How long is the flight from London Heathrow Airport to Southeast Asia?

Air India, Shenzhen Airlines, and China Eastern can get you from London Heathrow Airport to Southeast Asia in just under 17h 20m. Your travel time can differ by up to 18h 40m. The distance between London Heathrow Airport and Southeast Asia is about 6345 mi. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

The cheapest airline one-way is Shenzhen Airlines, with whom users have recently found tickets for as low as £183. However, be on the lookout for offers from Air China and SAUDIA, as they are both options that can get you from London Heathrow Airport to Southeast Asia for a low price.

In terms of precipitation, rainfall in Southeast Asia ranges from 10.0 - 320.0 inches per month. September is typically the wettest month, when rainfall can reach 320.0 mm. January is typically the driest time to visit Southeast Asia when rainfall is around 10.0 mm.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.0 C).

What are the most popular routes from London Heathrow Airport to Southeast Asia?

While some choose either London Heathrow - Kuala Lumpur Intl or London Heathrow - Manila Ninoy Aquino Intl, London Heathrow - Bangkok Suvarnabhumi is the most popular route from London Heathrow Airport to Southeast Asia.

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Looking for the cheapest flight from London Heathrow Airport to Southeast Asia? While on average our users pay £2,341, our data indicates the cheapest price to be £466. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £360.

What are the most popular airlines that fly from London Heathrow Airport to Southeast Asia?

The most popular airlines flying from London Heathrow Airport to Southeast Asia are Thai Airways, Etihad Airways and Singapore Airlines. Something to consider prior to booking your flight.

Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

Yes. In addition to deals on Heathrow to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Southeast Asia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southeast Asia.

Can I find deals for business class flights from Heathrow to Southeast Asia?

Yes. Cheapflights offers flight deals from Heathrow to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£246+ Flights from London Heathrow Airport to Southeast Asia

Cheap flight deals from Heathrow to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Southeast Asia
Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Wed 31/1221:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Fri 30/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 15/12£440

Sun 28/1221:15LHR - BKK

1 stop29h 50mHainan Airlines

Tue 20/111:10BKK - LHR

1 stop36h 10mHainan Airlines

Deal found 16/12£446

Wed 31/1219:45LHR - BKK

1 stop31h 20mHainan Airlines

Tue 20/111:10BKK - LHR

1 stop36h 10mHainan Airlines

Deal found 15/12£454

Sun 28/1221:15LHR - BKK

1 stop29h 50mHainan Airlines

Sun 25/111:10BKK - LHR

2 stops37h 45mHainan Airlines

Deal found 16/12£460

Sun 28/1221:15LHR - BKK

1 stop29h 50mHainan Airlines

Thu 22/111:10BKK - LHR

2 stops37h 25mHainan Airlines

Deal found 15/12£466

Wed 31/1221:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Fri 23/119:40HAN - LHR

1 stop30h 30mShenzhen Airlines

Deal found 14/12£503

Wed 31/1219:45LHR - BKK

1 stop31h 20mHainan Airlines

Tue 13/119:10BKK - LHR

1 stop28h 10mHainan Airlines

Deal found 16/12£510

Mon 29/1221:10LHR - KUL

1 stop38h 20mShenzhen Airlines

Tue 20/120:30KUL - LHR

1 stop30h 40mShenzhen Airlines

Deal found 14/12£519

Tue 30/1219:20LHR - BKK

1 stop16h 25mEtihad Airways

Wed 14/109:25BKK - LHR

1 stop28h 15mEtihad Airways

Deal found 15/12£523

Wed 31/1220:55LHR - BKK

1 stop19h 30mEtihad Airways

Wed 28/114:40BKK - LHR

1 stop23h 00mEtihad Airways

Deal found 15/12£524

Sun 28/1217:15LHR - SGN

1 stop25h 25mChina Southern

Sat 24/102:40SGN - LHR

1 stop18h 20mChina Southern

Deal found 15/12£530

Wed 31/1221:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Sat 24/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 15/12£538

Best flights from Heathrow to Southeast Asia
Discover carefully curated flight deals from Heathrow to Southeast Asia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 December 2025.

Thu 30/420:35LHR - SGN

1 stop17h 20mAir India

Thu 14/520:55SGN - LHR

1 stop20h 35mAir India

Deal found 15/12£450

Wed 14/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Sat 24/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 15/12£460

Sat 10/121:00LHR - SGN

2 stops36h 00mChina Eastern

Wed 4/204:40SGN - LHR

1 stop19h 50mChina Eastern

Deal found 16/12£480

Sat 17/116:40LHR - SIN

1 stop16h 45mLufthansa

Tue 27/123:45SIN - LHR

1 stop16h 20mLufthansa

Deal found 16/12£492

Thu 29/117:50LHR - SIN

1 stop15h 35mMultiple Airlines

Wed 4/200:05SIN - LHR

1 stop19h 10mMultiple Airlines

Deal found 15/12£506

Thu 22/117:05LHR - KUL

2 stops17h 40mKLM

Mon 26/123:50KUL - LHR

1 stop17h 10mKLM

Deal found 16/12£522

Thu 15/113:55LHR - KUL

1 stop21h 40mEtihad Airways

Mon 26/109:35KUL - LHR

1 stop36h 55mEtihad Airways

Deal found 16/12£526

Wed 11/209:30LHR - SIN

1 stop19h 00mGulf Air

Sun 15/220:00SIN - LHR

1 stop18h 35mGulf Air

Deal found 15/12£536

Sat 10/120:05LHR - SIN

1 stop37h 55mSWISS

Tue 20/100:05SIN - LHR

2 stops21h 35mSWISS

Deal found 17/12£548

Thu 15/116:15LHR - HKT

1 stop23h 15mSAUDIA

Fri 30/115:15HKT - LHR

1 stop23h 15mSAUDIA

Deal found 15/12£581

Tue 12/519:50LHR - DPS

1 stop36h 10mVietnam Airlines

Wed 20/516:00DPS - LHR

1 stop31h 55mVietnam Airlines

Deal found 14/12£598

Tue 20/122:00LHR - HKT

1 stop35h 25mChina Southern

Mon 16/223:20HKT - LHR

2 stops45h 40mChina Southern

Deal found 16/12£607

Tue 20/115:30LHR - SIN

1 stop15h 25mBritish Airways

Tue 10/223:15SIN - LHR

Nonstop14h 40mBritish Airways

Deal found 16/12£616

Tue 3/317:50LHR - HAN

1 stop17h 40mCathay Pacific

Wed 25/319:30HAN - LHR

1 stop26h 30mCathay Pacific

Deal found 16/12£645

Sat 2/521:35LHR - BKK

1 stop19h 30mMalaysia Airlines

Thu 28/518:40BKK - LHR

1 stop17h 15mMalaysia Airlines

Deal found 16/12£649

Fri 9/121:15LHR - MNL

1 stop34h 40mChina Airlines

Mon 19/110:55MNL - LHR

1 stop38h 00mChina Airlines

Deal found 14/12£674

Thu 5/321:20LHR - USM

1 stop17h 00mEVA Air

Sat 14/309:00USM - LHR

1 stop17h 05mEVA Air

Deal found 14/12£868

Sat 23/520:45LHR - SGN

1 stop17h 10mAir India

Wed 10/620:55SGN - LHR

1 stop16h 35mAir India

Deal found 16/12£451

Fri 27/221:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Sat 21/302:10HAN - LHR

1 stop24h 00mShenzhen Airlines

Deal found 16/12£463

Thu 7/509:45LHR - SGN

1 stop28h 10mAir India

Thu 21/520:55SGN - LHR

1 stop16h 35mAir India

Deal found 16/12£451

Sat 28/221:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Sun 22/302:10HAN - LHR

1 stop24h 00mShenzhen Airlines

Deal found 16/12£463

Thu 22/121:50LHR - SIN

1 stop30h 40mGulf Air

Mon 26/120:00SIN - LHR

1 stop18h 35mGulf Air

Deal found 16/12£537

Thu 22/113:55LHR - KUL

1 stop21h 40mEtihad Airways

Sat 28/209:35KUL - LHR

1 stop29h 05mEtihad Airways

Deal found 14/12£545

Sat 10/121:10LHR - SGN

1 stop21h 40mMultiple Airlines

Thu 5/214:50SGN - LHR

3 stops33h 45mMultiple Airlines

Deal found 16/12£557

Sat 24/121:10LHR - HAN

1 stop33h 45mShenzhen Airlines

Sun 15/214:55HAN - LHR

1 stop35h 15mShenzhen Airlines

Deal found 16/12£463

Wed 13/507:00LHR - DPS

3 stops34h 05mSWISS

Wed 20/513:05DPS - LHR

2 stops25h 50mSWISS

Deal found 14/12£577

Thu 11/619:10LHR - DPS

1 stop36h 50mVietnam Airlines

Wed 17/616:00DPS - LHR

1 stop31h 55mVietnam Airlines

Deal found 15/12£598

Thu 30/421:45LHR - DPS

1 stop32h 50mAir India

Mon 11/510:00DPS - LHR

1 stop32h 30mAir India

Deal found 14/12£501

Thu 5/214:15LHR - DPS

2 stops21h 55mSAUDIA

Wed 18/222:05DPS - LHR

2 stops22h 10mSAUDIA

Deal found 14/12£612

Wed 4/321:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Tue 17/302:10HAN - LHR

1 stop24h 00mShenzhen Airlines

Deal found 16/12£463

Direct flights from Heathrow to Southeast Asia
Explore direct flight options from Heathrow to Southeast Asia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 December 2025.

Wed 18/320:35LHR - KUL

Nonstop12h 50mBritish Airways

Sun 24/522:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 16/12£500

Wed 18/320:35LHR - KUL

Nonstop12h 50mBritish Airways

Tue 12/522:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 16/12£501

Sat 11/421:30LHR - KUL

Nonstop13h 20mBritish Airways

Tue 5/522:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 15/12£517

Sun 1/221:20LHR - BKK

Nonstop11h 40mEVA Air

Wed 30/912:45BKK - LHR

Nonstop12h 35mEVA Air

Deal found 16/12£527

Fri 17/421:35LHR - KUL

Nonstop13h 15mMalaysia Airlines

Tue 5/509:50KUL - LHR

Nonstop13h 45mMalaysia Airlines

Deal found 15/12£532

Mon 13/421:35LHR - BKK

Nonstop11h 55mEVA Air

Fri 8/512:20BKK - LHR

Nonstop13h 00mEVA Air

Deal found 15/12£533

Tue 17/320:10LHR - SIN

Nonstop13h 30mQantas Airways

Sat 28/323:05SIN - LHR

Nonstop15h 10mQantas Airways

Deal found 15/12£536

Wed 13/521:35LHR - BKK

Nonstop11h 55mEVA Air

Thu 21/512:20BKK - LHR

Nonstop13h 00mEVA Air

Deal found 16/12£536

Sat 10/121:00LHR - SIN

Nonstop13h 25mBritish Airways

Mon 19/123:15SIN - LHR

Nonstop14h 40mBritish Airways

Deal found 15/12£542

Sat 11/421:30LHR - KUL

Nonstop13h 20mBritish Airways

Fri 1/522:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 15/12£546

Tue 17/309:10LHR - SIN

Nonstop13h 00mSingapore Airlines

Tue 24/309:00SIN - LHR

Nonstop14h 20mSingapore Airlines

Deal found 16/12£550

Thu 15/121:45LHR - SIN

Nonstop13h 15mSingapore Airlines

Thu 29/109:00SIN - LHR

Nonstop14h 20mSingapore Airlines

Deal found 15/12£551

Last-minute flights from Heathrow to Southeast Asia
Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 17 December 2025 and is based on user searches.

Wed 31/1221:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Fri 30/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 15/12£440

Wed 7/117:15LHR - BKK

2 stops25h 25mChina Southern

Fri 6/311:25BKK - LHR

1 stop38h 10mChina Southern

Deal found 16/12£439

Wed 7/119:45LHR - BKK

1 stop31h 20mHainan Airlines

Thu 22/111:10BKK - LHR

2 stops37h 25mHainan Airlines

Deal found 14/12£440

Fri 9/121:00LHR - HAN

2 stops42h 10mHainan Airlines

Sun 25/123:15HAN - LHR

2 stops25h 40mHainan Airlines

Deal found 16/12£394

Fri 9/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Sat 24/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 16/12£437

Sun 11/121:00LHR - HAN

1 stop21h 45mChina Eastern

Fri 23/102:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 15/12£401

Mon 12/121:00LHR - HAN

1 stop21h 45mChina Eastern

Sun 25/102:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 15/12£398

Tue 13/121:00LHR - HAN

1 stop37h 45mChina Eastern

Tue 20/118:45HAN - LHR

1 stop29h 45mChina Eastern

Deal found 16/12£398

Wed 14/121:00LHR - HAN

1 stop37h 45mChina Eastern

Thu 29/102:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 14/12£367

Wed 14/121:00LHR - HAN

1 stop21h 45mChina Eastern

Wed 21/118:45HAN - LHR

1 stop29h 45mChina Eastern

Deal found 15/12£393

Thu 29/121:00LHR - HAN

1 stop37h 45mChina Eastern

Wed 4/202:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 14/12£390

Fri 30/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Tue 24/202:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 16/12£439

One-way flights from Heathrow to Southeast Asia
Search for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 17 December 2025.

Wed 28/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 16/12£246

Fri 9/121:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Deal found 16/12£247

Sun 11/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 16/12£248

Wed 14/121:10LHR - HAN

1 stop33h 45mShenzhen Airlines

Deal found 16/12£248

Sat 28/221:10LHR - HAN

1 stop33h 45mShenzhen Airlines

Deal found 15/12£249

Fri 20/221:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Deal found 15/12£250

Sat 24/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 16/12£251

Wed 4/221:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 15/12£255

Fri 30/121:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Deal found 16/12£257

Fri 23/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Deal found 15/12£257

Sat 10/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 15/12£257

Fri 9/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Deal found 15/12£258

Find flight deals from Heathrow to Southeast Asia

Round-trip from	£367
One-way from	£246
Popular in	December
Cheapest in	May
Average price	£850

China Eastern
14/1-29/1
2 total stops
59h 30m total
London to Southeast Asia

Search Deals

Shenzhen Airlines
28/1
1 total stop
21h 00m total
London to Southeast Asia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£40 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Thu 30/4

20:35-19:55

1 stop17h 20m

Ho Chi Minh City

Thu 14/5

20:55-11:30

1 stop20h 35m

£450

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sat 23/5

20:45-19:55

1 stop17h 10m

Ho Chi Minh City

Wed 10/6

20:55-07:30

1 stop16h 35m

£451

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Thu 7/5

09:45-19:55

1 stop28h 10m

Ho Chi Minh City

Thu 21/5

20:55-07:30

1 stop16h 35m

£451

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Wed 14/1

21:10-01:50

1 stop21h 40m

Ho Chi Minh City

Sat 24/1

02:50-19:10

1 stop23h 20m

£460

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Fri 27/2

21:10-01:10

1 stop21h 00m

Hanoi Noibai

Sat 21/3

02:10-19:10

1 stop24h 00m

£463

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Sat 28/2

21:10-01:10

1 stop21h 00m

Hanoi Noibai

Sun 22/3

02:10-19:10

1 stop24h 00m

£463

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Sat 24/1

21:10-13:55

1 stop33h 45m

Hanoi Noibai

Sun 15/2

14:55-19:10

1 stop35h 15m

£463

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 4/3

21:10-01:10

1 stop21h 00m

Hanoi Noibai

Tue 17/3

02:10-19:10

1 stop24h 00m

£463

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sat 10/1

21:00-16:00

2 stops36h 00m

Ho Chi Minh City

Wed 4/2

04:40-17:30

1 stop19h 50m

£480

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 17/1

16:40-17:25

1 stop16h 45m

Singapore Changi

Tue 27/1

23:45-08:05

1 stop16h 20m

£492

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 60 results

...

Best time to book a flight from Heathrow to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Heathrow with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Southeast Asia

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £372). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £548). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to YJX?

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Southeast Asia in the afternoon. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight at midday.

What is the cheapest day to fly from London Heathrow Airport to Southeast Asia?

Travellers seeking maximum savings on their London Heathrow Airport to Southeast Asia flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London Heathrow Airport to Southeast Asia

The most flights from LHR to zzYJX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Reviews of airlines servicing Southeast Asia

Check out reviews from past customers who have flown with Singapore Airlines, Cathay Pacific, andQatar Airways from London Heathrow Airport to Southeast Asia to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Singapore Airlines

8.1

Very Good

1,413 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

Singapore Airlines

8.1

Very Good

1,413 reviews

Singapore Airlines

8.1

Very Good

1,413 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

Cathay Pacific

7.6

Good

1,095 reviews

Singapore Airlines

8.1

Very Good

1,413 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

Qatar Airways

7.4

Good

3,683 reviews

Singapore Airlines

8.1

Very Good

1,413 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

Etihad Airways

7.4

Good

1,332 reviews

Singapore Airlines

8.1

Very Good

1,413 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

Air China

7.1

Good

129 reviews

Singapore Airlines

8.1

Very Good

1,413 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

Related info for your journey

How long is the flight from London Heathrow Airport to Southeast Asia?
Air India, Shenzhen Airlines, and China Eastern can get you from London Heathrow Airport to Southeast Asia in just under 17h 20m. Your travel time can differ by up to 18h 40m. The distance between London Heathrow Airport and Southeast Asia is about 6345 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?
The cheapest airline one-way is Shenzhen Airlines, with whom users have recently found tickets for as low as £183. However, be on the lookout for offers from Air China and SAUDIA, as they are both options that can get you from London Heathrow Airport to Southeast Asia for a low price.
What are the most popular routes from London Heathrow Airport to Southeast Asia?
While some choose either London Heathrow - Kuala Lumpur Intl or London Heathrow - Manila Ninoy Aquino Intl, London Heathrow - Bangkok Suvarnabhumi is the most popular route from London Heathrow Airport to Southeast Asia.
What are the most reliable airlines from London Heathrow Airport to Southeast Asia?
The top 3 most reliable airlines when flying from London Heathrow Airport to Southeast Asia are EVA Air (88%), Thai Airways (84%) and Air Canada (80%).
What are the cheapest flights from London Heathrow Airport to Southeast Asia?
Looking for the cheapest flight from London Heathrow Airport to Southeast Asia? While on average our users pay £2,341, our data indicates the cheapest price to be £466. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £360.
Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?
Yes. In addition to deals on Heathrow to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Southeast Asia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southeast Asia.
Can I find deals for business class flights from Heathrow to Southeast Asia?
Yes. Cheapflights offers flight deals from Heathrow to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?
Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £372). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £548). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Heathrow to Southeast Asia

Heathrow to Suvarnabhumi flights

Gatwick to Suvarnabhumi flights

Heathrow to Haneda flights

Stansted to Suvarnabhumi flights

London City to Suvarnabhumi flights

Heathrow to New Delhi flights

Heathrow to Narita flights

Heathrow to Kuala Lumpur Intl flights

Heathrow to Colombo flights

Gatwick to Narita flights

Gatwick to Haneda flights

Heathrow to Hong Kong flights

Luton to Suvarnabhumi flights

Heathrow to Manila flights

Heathrow to Mumbai flights

Stansted to Narita flights

London City to Narita flights

Heathrow to Don Mueang Intl flights

London City to Haneda flights

Heathrow to Incheon Intl flights

Heathrow to Islamabad flights

Heathrow to Singapore flights

Heathrow to Lahore flights

Gatwick to Manila flights

Heathrow to Phuket City flights

Stansted to Manila flights

Stansted to Haneda flights

Gatwick to New Delhi flights

Gatwick to Mumbai flights

Stansted to Mumbai flights

Stansted to New Delhi flights

London City to Manila flights

Gatwick to Kuala Lumpur Intl flights

Stansted to Colombo flights

Gatwick to Singapore flights

Gatwick to Colombo flights

Heathrow to Hyderabad flights

Stansted to Islamabad flights

Stansted to Kuala Lumpur Intl flights

Heathrow to Taiwan Taoyuan Intl flights

London City to Kuala Lumpur Intl flights

Gatwick to Islamabad flights

Heathrow to Denpasar flights

Heathrow to Hanoi flights

Heathrow to Malé flights

Heathrow to Dhaka flights

Heathrow to Ahmedabad flights

Gatwick to Lahore flights

Heathrow to Hongqiao Intl flights

Gatwick to Hong Kong flights

Complete your trip

Incheon Intl Airport car hire

Los Angeles Airport car hire

Bangkok Suvarnabhumi Airport car hire

Kastrup Copenhagen Airport car hire

Madrid Barajas Airport car hire

Miami Airport car hire

Manila Ninoy Aquino Intl Airport car hire

Bogotá El Dorado Airport car hire

San Francisco Airport car hire

Barcelona-El Prat Airport car hire

Boston Logan Intl Airport car hire

Frankfurt am Main Airport car hire

Direct flights to

Heathrow to Southeast Asia flights

Heathrow to Ho Chi Minh City flights

Heathrow to Ko Samui flights

Heathrow to Subang flights

Heathrow to Cebu City flights

Heathrow to Soekarno-Hatta Intl flights

Heathrow to Angeles City flights

Heathrow to Da Nang flights

Heathrow to Chiang Mai flights

Heathrow to Krabi flights

Heathrow to Penang flights

Heathrow to Davao City flights

Heathrow to Langkawi flights

Heathrow to Kota Kinabalu flights

Heathrow to Balikpapan flights

Heathrow to Yangon flights

Heathrow to Phu Quoc flights

Heathrow to Vientiane flights

Heathrow to Surabaya flights

Heathrow to Semarang flights

Heathrow to Surakarta City flights

Heathrow to Dumaguete City flights

Heathrow to Iloilo City flights

Heathrow to Medan flights

Heathrow to Laguindingan International flights

Heathrow to Rayong flights

Heathrow to Phnom Penh flights

Heathrow to Praya flights

Heathrow to Nha Trang flights

Heathrow to Boracay flights

Heathrow to Bandar Seri Begawan flights

Heathrow to Luang Prabang flights

Heathrow to Udon Thani flights

Heathrow to Bacolod flights

Heathrow to Panglao flights

Heathrow to Haiphong flights

Heathrow to Manado flights

Heathrow to Kuching flights

Heathrow to Senai flights

Heathrow to Port Blair flights

Heathrow to Sorong flights

Heathrow to Alor Setar flights

Heathrow to Hat Yai flights

Top 10 airlines flying from Heathrow to Southeast Asia

Airline	Cheapest	Average	Flexibility	On-time
Hainan Airlines	Cheapest£363	Average£438	FlexibilityNo cancel fee	On-time61%	Search Hainan Airlines flights
KLM	Cheapest£417	Average£793	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Royal Brunei Airlines	Cheapest£428	Average£571	FlexibilityNo cancel fee	On-time84%	Search Royal Brunei Airlines flights
Lufthansa	Cheapest£428	Average£647	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
SWISS	Cheapest£434	Average£697	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Austrian Airlines	Cheapest£440	Average£763	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Finnair	Cheapest£453	Average£787	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Norse Atlantic UK	Cheapest£456	Average£558	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
Hahn Air	Cheapest£481	Average£683	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights
IndiGo	Cheapest£512	Average£702	FlexibilityNo cancel fee	On-time80%	Search IndiGo flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

When you search for this flight from Heathrow to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Southeast Asia from Heathrow.

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Southeast Asia, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

Yes! Start tracking prices for Heathrow to Southeast Asia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Southeast Asia from £246

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Southeast Asia

Cheapest flights from Heathrow to Southeast AsiaExplore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Find flight deals from Heathrow to Southeast Asia

Keep the following information in mind while searching for Heathrow to Southeast Asia flight deals. Data was last updated 17 December 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Best time to book a flight from Heathrow to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Southeast Asia

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

What is the cheapest time of day to fly from LHR to YJX?

Find hourly flight availability from Heathrow to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 December 2025.

What is the cheapest day to fly from London Heathrow Airport to Southeast Asia?

Use this chart to determine the cheapest time to fly return from Heathrow to Southeast Asia. Price data was last updated on 16 December 2024.

Weekly flight availability from London Heathrow Airport to Southeast Asia

Reviews of airlines servicing Southeast Asia

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from London Heathrow Airport to Southeast Asia?

What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

What are the most popular routes from London Heathrow Airport to Southeast Asia?

What are the most reliable airlines from London Heathrow Airport to Southeast Asia?

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

How can I find direct flights from Heathrow to Southeast Asia?

Can I find deals for business class flights from Heathrow to Southeast Asia?

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Heathrow to Southeast Asia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Heathrow to Southeast Asia
Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.