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

China Eastern, Shenzhen Airlines, and Gulf Air can get you from London Heathrow Airport to Southeast Asia in just under 18h 45m. Your travel time can differ by up to 17h 20m. The distance between London Heathrow Airport and Southeast Asia is about 6149 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 Hainan Airlines, with whom users have recently found tickets for as low as £181. However, be on the lookout for offers from Shenzhen Airlines 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 - Bangkok Don Mueang Intl or London Heathrow - Kuala Lumpur 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 £1,715, our data indicates the cheapest price to be £479. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £416.

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 Etihad Airways, Qatar Airways and Cathay Pacific. 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.

£242+ Cheap 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

Best

Direct

Last-minute

One-way

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 15 September 2026.

Sun 25/1022:00 -

1 stop30h 25m

Wed 18/1102:10 -

1 stop23h 25m

Deal found 14/9£374

Thu 19/1122:00 -

1 stop20h 05m

Mon 14/1219:55 -

1 stop29h 40m

Deal found 13/9£386

Wed 28/1017:45 -

1 stop26h 30m

Tue 17/1104:30 -

1 stop20h 20m

Deal found 14/9£391

Thu 5/1121:30 -

1 stop32h 00m

Wed 2/1201:30 -

1 stop23h 20m

Deal found 14/9£394

Fri 18/912:35 -

1 stop22h 05m

Tue 20/1012:15 -

1 stop24h 20m

Deal found 14/9£396

Sun 20/922:05 -

1 stop20h 35m

Mon 5/1002:55 -

1 stop23h 55m

Deal found 14/9£400

Wed 23/922:10 -

1 stop21h 15m

Sun 11/1008:20 -

1 stop18h 00m

Deal found 14/9£402

Thu 1/1022:10 -

1 stop18h 05m

Thu 8/1008:20 -

1 stop18h 00m

Deal found 14/9£403

Mon 21/922:10 -

1 stop29h 25m

Sun 4/1017:45 -

1 stop32h 35m

Deal found 11/9£404

Fri 25/922:10 -

1 stop29h 25m

Fri 9/1008:20 -

1 stop18h 00m

Deal found 11/9£404

Mon 21/922:10 -

1 stop29h 25m

Mon 28/917:45 -

1 stop32h 35m

Deal found 11/9£405

Fri 27/1121:10 -

1 stop21h 00m

Wed 9/1202:10 -

1 stop25h 20m

Deal found 14/9£405

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 15 September 2026.

Sat 31/1021:10 -

1 stop20h 50m

Fri 13/1118:45 -

1 stop32h 25m

Deal found 12/9£502

Thu 24/921:20 -

2 stops46h 50m

Thu 8/1019:10 -

2 stops29h 30m

Deal found 14/9£505

Tue 29/910:00 -

1 stop19h 05m

Thu 10/1217:35 -

2 stops21h 00m

Deal found 13/9£526

Wed 28/1018:45 -

Nonstop13h 20m

Wed 17/223:05 -

Nonstop14h 20m

Deal found 12/9£589

Thu 24/922:10 -

1 stop17h 50m

Thu 8/1014:15 -

1 stop22h 05m

Deal found 14/9£612

Thu 29/1015:30 -

1 stop20h 25m

Sat 5/1208:20 -

1 stop20h 35m

Deal found 11/9£625

Tue 1/1220:05 -

2 stops42h 35m

Mon 7/1219:45 -

3 stops25h 55m

Deal found 13/9£629

Mon 23/1117:40 -

1 stop21h 45m

Wed 25/1123:50 -

1 stop22h 45m

Deal found 14/9£670

Thu 24/920:50 -

2 stops40h 15m

Sun 22/1110:15 -

2 stops26h 40m

Deal found 11/9£673

Thu 4/220:10 -

1 stop30h 55m

Fri 26/211:15 -

1 stop39h 55m

Deal found 10/9£720

Thu 4/209:10 -

1 stop15h 45m

Thu 11/208:55 -

1 stop18h 05m

Deal found 12/9£725

Tue 8/1210:35 -

2 stops17h 00m

Mon 28/1212:35 -

2 stops28h 00m

Deal found 12/9£731

Sat 17/1021:45 -

1 stop20h 05m

Mon 26/1015:30 -

1 stop22h 10m

Deal found 11/9£756

Tue 8/1210:00 -

2 stops26h 20m

Tue 29/1221:40 -

2 stops21h 05m

Deal found 10/9£791

Fri 5/310:25 -

1 stop21h 00m

Wed 31/319:20 -

1 stop28h 15m

Deal found 10/9£817

Sat 5/1221:20 -

Nonstop11h 40m

Tue 22/1212:40 -

Nonstop13h 25m

Deal found 13/9£822

Sun 20/906:15 -

2 stops24h 25m

Tue 6/1006:55 -

1 stop17h 55m

Deal found 12/9£993

Sat 27/221:10 -

1 stop36h 05m

Wed 3/318:45 -

1 stop33h 45m

Deal found 11/9£502

Sun 18/1017:30 -

2 stops22h 50m

Wed 18/1117:15 -

2 stops22h 50m

Deal found 12/9£1,026

Thu 29/1009:30 -

2 stops22h 00m

Wed 18/1117:35 -

2 stops21h 00m

Deal found 9/9£535

Mon 12/1011:20 -

1 stop18h 50m

Wed 21/1014:00 -

1 stop25h 00m

Deal found 10/9£1,089

Mon 8/206:30 -

2 stops21h 05m

Thu 25/217:30 -

1 stop30h 25m

Deal found 10/9£1,096

Tue 2/221:00 -

Nonstop13h 25m

Mon 22/223:15 -

Nonstop14h 30m

Deal found 13/9£590

Mon 22/221:10 -

1 stop33h 45m

Thu 11/302:10 -

1 stop24h 00m

Deal found 12/9£553

Sat 31/1021:40 -

2 stops33h 50m

Wed 18/1117:35 -

2 stops21h 00m

Deal found 9/9£560

Sat 27/221:00 -

Nonstop13h 25m

Wed 3/323:15 -

Nonstop14h 30m

Deal found 14/9£590

Mon 23/1118:40 -

2 stops20h 00m

Sun 13/1219:45 -

3 stops25h 55m

Deal found 14/9£665

Sat 2/108:25 -

1 stop16h 15m

Mon 25/108:40 -

1 stop16h 45m

Deal found 11/9£673

Fri 20/1121:10 -

1 stop31h 10m

Sun 7/303:05 -

1 stop24h 05m

Deal found 14/9£562

Sun 6/1217:05 -

2 stops17h 40m

Tue 19/123:50 -

2 stops18h 40m

Deal found 11/9£690

Find flight deals from Heathrow to Southeast Asia

Round-trip from	£374
One-way from	£242
Popular in	December
Cheapest in	September
Average price	£533

China Southern
25/10-18/11
2 total stops
53h 50m total
London to Southeast Asia

Search Deals

19/9-31/12
2 total stops
38h 00m total
London to Southeast Asia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£37 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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

Cheapest return flight

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Fri 27/11

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Wed 31/12

00:00-18:00

Nonstop0h 00m

£288

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Wed 30/9

22:05-18:15

1 stop38h 10m

Bangkok Suvarnabhumi

Wed 31/12

00:00-18:00

Nonstop0h 00m

£289

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Thu 21/1

19:00-03:10

1 stop24h 10m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

£293

LondonManila

LHR London Heathrow - MNL Manila Ninoy Aquino Intl

LHRMNL

London Heathrow

Sun 15/11

21:10-01:40

1 stop20h 30m

Manila Ninoy Aquino Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£296

LondonPhuket City

LHR London Heathrow - HKT Phuket City

LHRHKT

London Heathrow

Thu 21/1

21:30-22:20

1 stop17h 50m

Phuket City

Wed 31/12

00:00-18:00

Nonstop0h 00m

£296

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Tue 29/9

20:50-17:45

1 stop14h 55m

Bangkok Suvarnabhumi

Wed 31/12

00:00-18:00

Nonstop0h 00m

£311

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Thu 1/10

20:50-06:50

1 stop28h 00m

Bangkok Suvarnabhumi

Wed 31/12

00:00-18:00

Nonstop0h 00m

£311

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Fri 27/11

20:05-06:45

1 stop27h 40m

Bangkok Suvarnabhumi

Wed 31/12

00:00-18:00

Nonstop0h 00m

£311

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Mon 7/12

20:05-06:45

1 stop27h 40m

Bangkok Suvarnabhumi

Wed 31/12

00:00-18:00

Nonstop0h 00m

£311

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Sun 10/1

16:35-03:10

1 stop26h 35m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

£323

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

LHR-HAN

LHR-BKK

LHR-SIN

LHR-HKT

LHR-KUL

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

LHR-zzYJX

LHR-HAN

LHR-BKK

LHR-SIN

LHR-HKT

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 £620). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,030). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.

Weekly flight availability from London Heathrow Airport to Southeast Asia

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

The price you pay for your flight from London Heathrow Airport to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Southeast Asia

Check out reviews from past customers who have flown with Singapore Airlines,Cathay Pacific, andAir China 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

8.2

Very Good

1,601 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SIN - JNB

Cabin crew in business class was just so amazing, friendly, caring and professional

Singapore Airlines

8.2

Very Good

1,601 reviews

Singapore Airlines

8.2

Very Good

1,601 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SIN - JNB

Cabin crew in business class was just so amazing, friendly, caring and professional

Cathay Pacific

7.6

Good

1,486 reviews

Singapore Airlines

8.2

Very Good

1,601 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SIN - JNB

Cabin crew in business class was just so amazing, friendly, caring and professional

Air China

7.5

Good

165 reviews

Singapore Airlines

8.2

Very Good

1,601 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SIN - JNB

Cabin crew in business class was just so amazing, friendly, caring and professional

Qatar Airways

7.4

Good

3,734 reviews

Singapore Airlines

8.2

Very Good

1,601 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SIN - JNB

Cabin crew in business class was just so amazing, friendly, caring and professional

Etihad Airways

7.3

Good

1,533 reviews

Singapore Airlines

8.2

Very Good

1,601 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SIN - JNB

Cabin crew in business class was just so amazing, friendly, caring and professional

Related info for your journey

How long is the flight from London Heathrow Airport to Southeast Asia?
China Eastern, Shenzhen Airlines, and Gulf Air can get you from London Heathrow Airport to Southeast Asia in just under 18h 45m. Your travel time can differ by up to 17h 20m. The distance between London Heathrow Airport and Southeast Asia is about 6149 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 Hainan Airlines, with whom users have recently found tickets for as low as £181. However, be on the lookout for offers from Shenzhen Airlines 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 - Bangkok Don Mueang Intl or London Heathrow - Kuala Lumpur 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 Thai Airways (84%), EVA Air (84%) and Air Canada (82%).
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 £1,715, our data indicates the cheapest price to be £479. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £416.
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 £620). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,030). 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

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Top 10 airlines flying from Heathrow to Southeast Asia

Airline	Cheapest	Average	Flexibility	On-time
HK Express	Cheapest£103	Average£125	FlexibilityNo cancel fee	On-time90%	Search HK Express flights
Norse Atlantic UK	Cheapest£288	Average£586	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
XiamenAir	Cheapest£295	Average£437	FlexibilityNo cancel fee	On-time49%	Search XiamenAir flights
Royal Jordanian	Cheapest£306	Average£711	FlexibilityNo cancel fee	On-time61%	Search Royal Jordanian flights
Scandinavian Airlines	Cheapest£338	Average£630	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Hainan Airlines	Cheapest£361	Average£430	FlexibilityNo cancel fee	On-time61%	Search Hainan Airlines flights
Riyadh Air	Cheapest£396	Average£545	FlexibilityNo cancel fee	On-timeN/A	Search Riyadh Air flights
Condor	Cheapest£447	Average£613	FlexibilityNo cancel fee	On-time76%	Search Condor flights
ITA Airways	Cheapest£470	Average£544	FlexibilityNo cancel fee	On-time81%	Search ITA Airways flights
KLM	Cheapest£478	Average£884	FlexibilityNo cancel fee	On-time75%	Search KLM 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.

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Cheap flights from London Heathrow Airport to Southeast Asia from £242

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/9. 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 15 September 2026.

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 15 September 2026.

Best flights from Heathrow to Southeast AsiaDiscover 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 15 September 2026.

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 15 September 2026.

Direct flights from Heathrow to Southeast AsiaExplore 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 15 September 2026.

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 15 September 2026.

Last-minute flights from Heathrow to Southeast AsiaDiscover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 15 September 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 15 September 2026 and is based on user searches.

One-way flights from Heathrow to Southeast AsiaSearch for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.

Search for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.

Find flight deals from Heathrow to Southeast Asia

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

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 15 September 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.

Weekly flight availability from London Heathrow Airport to Southeast Asia

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

The price you pay for your flight from London Heathrow Airport to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Southeast Asia

Related info for your journey

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.

Complete your trip

Complete your trip to Southeast Asia by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

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Heathrow and Southeast Asia flights

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Heathrow to Southeast Asia flights

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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 15 September 2026.

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 15 September 2026.

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 15 September 2026.

Last-minute flights from Heathrow to Southeast Asia
Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 15 September 2026 and is based on user searches.

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 15 September 2026.