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

Air China, Shenzhen Airlines, and Air India can get you from London Heathrow Airport to Southeast Asia in just under 20h. Your travel time can differ by up to 13h 45m. 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 £184. 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 £2,536, our data indicates the cheapest price to be £468. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £370.

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.

£247+ 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 9 December 2025.

Sun 28/1221:10LHR - HAN

1 stop33h 45mShenzhen Airlines

Fri 16/102:10HAN - LHR

1 stop24h 00mShenzhen Airlines

Deal found 8/12£445

Wed 31/1221:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Fri 23/119:40HAN - LHR

1 stop30h 30mShenzhen Airlines

Deal found 7/12£455

Sun 7/1221:15LHR - BKK

1 stop29h 50mHainan Airlines

Tue 23/1211:10BKK - LHR

1 stop36h 10mHainan Airlines

Deal found 6/12£458

Wed 31/1221:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Sat 17/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 8/12£462

Wed 31/1221:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Thu 22/114:55HAN - LHR

1 stop35h 15mShenzhen Airlines

Deal found 8/12£466

Sun 7/1221:15LHR - BKK

1 stop29h 50mHainan Airlines

Sun 14/1219:10BKK - LHR

2 stops29h 45mHainan Airlines

Deal found 6/12£467

Sat 6/1221:35LHR - BKK

1 stop36h 05mAir China

Sat 20/1219:30BKK - LHR

1 stop29h 20mAir China

Deal found 6/12£470

Sun 7/1221:15LHR - BKK

1 stop29h 50mHainan Airlines

Sun 28/1211:10BKK - LHR

2 stops37h 45mHainan Airlines

Deal found 7/12£473

Tue 30/1222:00LHR - BKK

1 stop17h 30mChina Southern

Wed 25/311:25BKK - LHR

1 stop38h 10mChina Southern

Deal found 8/12£474

Wed 24/1222:00LHR - BKK

1 stop17h 30mMultiple Airlines

Sat 27/1209:25BKK - LHR

1 stop15h 45mMultiple Airlines

Deal found 8/12£476

Sun 7/1221:15LHR - SIN

1 stop29h 55mHainan Airlines

Wed 10/1204:40SIN - LHR

2 stops44h 55mHainan Airlines

Deal found 7/12£481

Sun 7/1208:25LHR - BKK

1 stop15h 20mMultiple Airlines

Tue 23/1212:45BKK - LHR

1 stop15h 55mMultiple Airlines

Deal found 6/12£496

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 9 December 2025.

Wed 8/422:40LHR - SGN

1 stop20h 00mAir China

Tue 14/402:50SGN - LHR

2 stops47h 25mAir China

Deal found 8/12£454

Wed 31/1221:10LHR - HAN

1 stop33h 45mShenzhen Airlines

Fri 23/119:40HAN - LHR

1 stop30h 30mShenzhen Airlines

Deal found 8/12£456

Thu 5/321:05LHR - DPS

1 stop32h 45mAir India

Mon 23/310:00DPS - LHR

1 stop33h 30mAir India

Deal found 8/12£491

Sun 1/217:15LHR - DPS

2 stops30h 20mChina Southern

Thu 12/208:35DPS - LHR

1 stop42h 00mChina Southern

Deal found 8/12£496

Mon 20/417:50LHR - DPS

2 stops19h 40mLufthansa

Mon 18/513:05DPS - LHR

2 stops26h 10mLufthansa

Deal found 8/12£511

Thu 23/410:20LHR - SIN

1 stop25h 10mFinnair

Thu 28/521:35SIN - LHR

1 stop30h 05mFinnair

Deal found 8/12£545

Fri 1/520:05LHR - DPS

2 stops45h 00mMultiple Airlines

Tue 12/513:05DPS - LHR

2 stops26h 35mMultiple Airlines

Deal found 8/12£548

Thu 8/120:05LHR - SIN

1 stop37h 55mSWISS

Wed 14/100:05SIN - LHR

1 stop16h 00mSWISS

Deal found 8/12£558

Fri 16/108:50LHR - HKT

1 stop31h 45mEtihad Airways

Sat 24/115:30HKT - LHR

1 stop27h 35mEtihad Airways

Deal found 8/12£583

Thu 22/114:55LHR - KUL

1 stop15h 45mQatar Airways

Wed 11/202:00KUL - LHR

1 stop18h 15mQatar Airways

Deal found 7/12£586

Tue 6/121:30LHR - DPS

2 stops31h 40mIndiGo

Tue 13/118:50DPS - LHR

2 stops32h 30mIndiGo

Deal found 8/12£607

Wed 29/411:25LHR - SIN

Nonstop13h 05mSingapore Airlines

Wed 6/512:35SIN - LHR

Nonstop13h 55mSingapore Airlines

Deal found 7/12£613

Sun 11/110:00LHR - MNL

1 stop19h 50mSAUDIA

Thu 26/321:40MNL - LHR

1 stop22h 35mSAUDIA

Deal found 8/12£616

Mon 2/220:10LHR - SIN

Nonstop13h 30mQantas Airways

Wed 25/323:05SIN - LHR

Nonstop15h 10mQantas Airways

Deal found 8/12£627

Fri 13/209:30LHR - SIN

1 stop19h 00mGulf Air

Thu 19/220:00SIN - LHR

1 stop18h 35mGulf Air

Deal found 7/12£628

Thu 4/617:10LHR - KUL

2 stops19h 15mKLM

Sun 7/623:55KUL - LHR

1 stop26h 30mKLM

Deal found 7/12£639

Wed 20/516:00LHR - KUL

1 stop17h 15mBritish Airways

Thu 18/622:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 8/12£639

Wed 7/111:00LHR - MNL

1 stop33h 20mVietnam Airlines

Mon 1/605:20MNL - LHR

1 stop18h 45mVietnam Airlines

Deal found 6/12£651

Sun 11/119:50LHR - BKK

2 stops32h 10mScandinavian Airlines

Sat 24/112:45BKK - LHR

2 stops32h 50mScandinavian Airlines

Deal found 7/12£666

Fri 23/121:15LHR - MNL

1 stop28h 40mChina Airlines

Mon 23/210:55MNL - LHR

1 stop38h 00mChina Airlines

Deal found 7/12£677

Sat 21/311:30LHR - HKT

2 stops17h 30mTurkish Airlines

Wed 8/419:40HKT - LHR

2 stops19h 55mTurkish Airlines

Deal found 7/12£776

Sun 11/116:50LHR - HKT

1 stop17h 45mCathay Pacific

Wed 28/118:35HKT - LHR

2 stops26h 00mCathay Pacific

Deal found 8/12£798

Fri 6/215:45LHR - MNL

1 stop17h 35mKuwait Airways

Thu 18/622:45MNL - LHR

1 stop23h 00mKuwait Airways

Deal found 6/12£799

Fri 16/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Fri 30/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 7/12£461

Thu 15/121:35LHR - SGN

2 stops45h 15mAir China

Wed 11/205:00SGN - LHR

1 stop19h 50mAir China

Deal found 8/12£475

Thu 5/321:05LHR - DPS

1 stop32h 45mAir India

Sun 22/310:00DPS - LHR

1 stop41h 20mAir India

Deal found 8/12£491

Sun 1/221:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Sat 28/202:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 8/12£461

Sun 18/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Thu 29/102:50SGN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 7/12£461

Thu 21/509:45LHR - SGN

1 stop28h 10mAir India

Fri 5/620:55SGN - LHR

1 stop20h 35mAir India

Deal found 8/12£507

Thu 29/114:25LHR - SIN

2 stops19h 35mSWISS

Sun 8/200:05SIN - LHR

2 stops21h 35mSWISS

Deal found 8/12£573

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 9 December 2025.

Sun 25/118:40LHR - SIN

Nonstop13h 15mBritish Airways

Fri 6/223:05SIN - LHR

Nonstop14h 40mBritish Airways

Deal found 8/12£473

Sun 17/519:50LHR - HAN

Nonstop11h 45mVietnam Airlines

Sun 31/511:05HAN - LHR

Nonstop12h 45mVietnam Airlines

Deal found 7/12£483

Tue 13/110:25LHR - KUL

Nonstop12h 50mMalaysia Airlines

Sun 1/209:15KUL - LHR

Nonstop14h 10mMalaysia Airlines

Deal found 8/12£509

Thu 22/120:35LHR - KUL

Nonstop12h 50mBritish Airways

Sun 8/223:20KUL - LHR

Nonstop14h 05mBritish Airways

Deal found 8/12£518

Tue 12/521:30LHR - KUL

Nonstop13h 20mBritish Airways

Wed 20/522:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 8/12£520

Tue 20/110:25LHR - KUL

Nonstop12h 50mMalaysia Airlines

Sat 31/109:15KUL - LHR

Nonstop14h 10mMalaysia Airlines

Deal found 7/12£521

Tue 13/110:25LHR - KUL

Nonstop12h 50mMalaysia Airlines

Sat 31/109:15KUL - LHR

Nonstop14h 10mMalaysia Airlines

Deal found 8/12£524

Mon 9/210:25LHR - KUL

Nonstop12h 50mMalaysia Airlines

Wed 25/309:15KUL - LHR

Nonstop14h 10mMalaysia Airlines

Deal found 7/12£527

Tue 3/321:20LHR - BKK

Nonstop11h 40mEVA Air

Fri 8/512:20BKK - LHR

Nonstop13h 00mEVA Air

Deal found 8/12£530

Mon 12/120:35LHR - KUL

Nonstop12h 50mBritish Airways

Sun 1/223:20KUL - LHR

Nonstop14h 05mBritish Airways

Deal found 8/12£532

Sun 15/220:35LHR - KUL

Nonstop12h 50mBritish Airways

Mon 23/323:20KUL - LHR

Nonstop14h 05mBritish Airways

Deal found 7/12£533

Sun 17/521:35LHR - BKK

Nonstop11h 55mEVA Air

Sun 31/512:20BKK - LHR

Nonstop13h 00mEVA Air

Deal found 7/12£539

Last-minute flights from Heathrow to Southeast Asia
Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 9 December 2025 and is based on user searches.

Sun 11/121:00LHR - HAN

2 stops34h 45mChina Eastern

Sun 1/216:15HAN - LHR

2 stops32h 15mChina Eastern

Deal found 8/12£406

Mon 12/121:00LHR - HAN

1 stop34h 10mChina Eastern

Sun 25/102:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 8/12£412

Mon 12/120:25LHR - SGN

1 stop21h 45mAir China

Mon 26/105:00SGN - LHR

1 stop19h 50mAir China

Deal found 7/12£453

Tue 13/120:25LHR - HAN

1 stop32h 30mAir China

Fri 30/113:30HAN - LHR

1 stop35h 20mAir China

Deal found 6/12£401

Wed 14/121:00LHR - HAN

2 stops35h 15mChina Eastern

Sun 25/118:45HAN - LHR

1 stop29h 45mChina Eastern

Deal found 7/12£401

Wed 14/121:00LHR - HAN

2 stops35h 15mChina Eastern

Tue 27/102:35HAN - LHR

2 stops21h 55mChina Eastern

Deal found 8/12£410

Thu 15/121:00LHR - HAN

1 stop21h 45mChina Eastern

Sun 25/102:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 7/12£395

Thu 15/121:35LHR - HAN

2 stops30h 40mAir China

Thu 29/113:20HAN - LHR

1 stop35h 30mAir China

Deal found 7/12£414

Mon 19/119:35LHR - BKK

1 stop16h 20mChina Southern

Mon 2/300:30BKK - LHR

2 stops44h 30mChina Southern

Deal found 8/12£453

Wed 21/121:00LHR - HAN

1 stop21h 45mChina Eastern

Tue 27/102:45HAN - LHR

1 stop21h 45mChina Eastern

Deal found 7/12£409

Sun 25/121:00LHR - HAN

1 stop37h 45mChina Eastern

Sun 1/215:10HAN - LHR

1 stop33h 20mChina Eastern

Deal found 7/12£413

Thu 29/121:00LHR - HAN

1 stop37h 45mChina Eastern

Mon 16/218:45HAN - LHR

1 stop29h 45mChina Eastern

Deal found 7/12£400

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 9 December 2025.

Mon 12/121:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Deal found 7/12£247

Wed 7/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 8/12£248

Fri 9/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 8/12£248

Wed 4/321:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 8/12£250

Sat 24/121:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Deal found 7/12£251

Fri 30/121:10LHR - HAN

1 stop33h 45mShenzhen Airlines

Deal found 7/12£251

Fri 23/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 7/12£252

Sat 7/221:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 8/12£256

Wed 18/221:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Deal found 8/12£257

Sun 11/121:10LHR - HAN

1 stop21h 00mShenzhen Airlines

Deal found 7/12£257

Mon 12/121:10LHR - SGN

1 stop21h 40mShenzhen Airlines

Deal found 7/12£258

Sat 7/321:10LHR - HAN

1 stop28h 30mShenzhen Airlines

Deal found 7/12£258

Find flight deals from Heathrow to Southeast Asia

Round-trip from	£392
One-way from	£247
Popular in	December
Cheapest in	May
Average price	£855

China Eastern
3/3-16/3
2 total stops
51h 30m total
London to Southeast Asia

Search Deals

Shenzhen Airlines
12/1
1 total stop
28h 30m total
London to Southeast Asia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£41 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

Wed 8/4

22:40-00:40

1 stop20h 00m

Ho Chi Minh City

Tue 14/4

02:50-20:15

2 stops47h 25m

£454

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 31/12

21:10-13:55

1 stop33h 45m

Hanoi Noibai

Fri 23/1

19:40-19:10

1 stop30h 30m

£456

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Fri 16/1

21:10-01:50

1 stop21h 40m

Ho Chi Minh City

Fri 30/1

02:50-19:10

1 stop23h 20m

£461

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sun 1/2

21:10-01:50

1 stop21h 40m

Ho Chi Minh City

Sat 28/2

02:50-19:10

1 stop23h 20m

£461

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sun 18/1

21:10-01:50

1 stop21h 40m

Ho Chi Minh City

Thu 29/1

02:50-19:10

1 stop23h 20m

£461

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Thu 15/1

21:35-01:50

2 stops45h 15m

Ho Chi Minh City

Wed 11/2

05:00-17:50

1 stop19h 50m

£475

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Thu 5/3

21:05-13:50

1 stop32h 45m

Denpasar Bali Ngurah Rai

Mon 23/3

10:00-11:30

1 stop33h 30m

£491

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Thu 5/3

21:05-13:50

1 stop32h 45m

Denpasar Bali Ngurah Rai

Sun 22/3

10:00-19:20

1 stop41h 20m

£491

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Sun 1/2

17:15-07:35

2 stops30h 20m

Denpasar Bali Ngurah Rai

Thu 12/2

08:35-18:35

1 stop42h 00m

£496

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Thu 21/5

09:45-19:55

1 stop28h 10m

Ho Chi Minh City

Fri 5/6

20:55-11:30

1 stop20h 35m

£507

Flights are sorted by cheapest return flights first.

Deals found on 8/12

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 £374). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £550). 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

1,411 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

1,411 reviews

Singapore Airlines

8.1

Very Good

1,411 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

1,088 reviews

Singapore Airlines

8.1

Very Good

1,411 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

3,676 reviews

Singapore Airlines

8.1

Very Good

1,411 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

1,330 reviews

Singapore Airlines

8.1

Very Good

1,411 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

7.2

Good

127 reviews

Singapore Airlines

8.1

Very Good

1,411 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 China, Shenzhen Airlines, and Air India can get you from London Heathrow Airport to Southeast Asia in just under 20h. Your travel time can differ by up to 13h 45m. 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 £184. 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 (90%), Thai Airways (87%) and Air Canada (83%).
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 £2,536, our data indicates the cheapest price to be £468. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £370.
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 £374). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £550). 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

London City to Suvarnabhumi flights

Stansted to Suvarnabhumi flights

Heathrow to Haneda flights

Heathrow to Kuala Lumpur Intl flights

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Direct flights to

Heathrow to Southeast Asia flights

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Top 10 airlines flying from Heathrow to Southeast Asia

Airline	Cheapest	Average	Flexibility	On-time
Hainan Airlines	Cheapest£366	Average£440	FlexibilityNo cancel fee	On-time61%	Search Hainan Airlines flights
KLM	Cheapest£420	Average£805	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Royal Brunei Airlines	Cheapest£430	Average£574	FlexibilityNo cancel fee	On-time84%	Search Royal Brunei Airlines flights
Lufthansa	Cheapest£431	Average£654	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
SWISS	Cheapest£441	Average£704	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Austrian Airlines	Cheapest£443	Average£776	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Finnair	Cheapest£456	Average£791	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Norse Atlantic UK	Cheapest£459	Average£561	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
Hahn Air	Cheapest£484	Average£687	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights
IndiGo	Cheapest£515	Average£706	FlexibilityNo cancel fee	On-time80%	Search IndiGo flights

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Cheap flights from London Heathrow Airport to Southeast Asia from £247

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 12/1. 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 9 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 9 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 9 December 2025.

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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 9 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?

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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

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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?

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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 9 December 2025.