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$406+ Cheap flights from Heathrow (LHR) to Southeast Asia

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap 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 July 29, 2025.

Round-trip from

$652
(Shenzhen Airlines)

One-way from

$406
(Mytrip)

Popular in

December

Cheapest in

November

Average price

$1,185
From London Heathrow to Southeast Asia
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One-way flight from London Heathrow to Southeast Asia
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Highest demand for flights based on searches. 4% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Heathrow to Southeast Asia

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 July 29, 2025.

This Shenzhen Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/110:05 pmLHR - HAN
1 stop28h 35mShenzhen Airlines
Sun 9/72:10 amHAN - LHR
1 stop23h 40mShenzhen Airlines
Deal found 7/29$652
This Lufthansa deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:40 pmLHR - SIN
1 stop16h 45mLufthansa
Sat 11/2211:45 pmSIN - LHR
1 stop16h 20mLufthansa
Deal found 7/27$658
This Gotogate deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2210:05 pmLHR - SIN
1 stop21h 25mShenzhen Airlines
Fri 9/266:10 pmSIN - LHR
1 stop32h 40mShenzhen Airlines
Deal found 7/28$659
This Booking.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:05 pmLHR - SIN
1 stop21h 25mMultiple Airlines
Sun 9/2112:05 pmSIN - LHR
2 stops38h 25mMultiple Airlines
Deal found 7/27$661
This FlightHub deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:35 pmLHR - SIN
1 stop18h 10mAir India
Mon 10/68:45 amSIN - LHR
1 stop17h 15mAir India
Deal found 7/27$663
This SWISS deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:40 pmLHR - SIN
1 stop15h 20mSWISS
Sat 11/1512:05 amSIN - LHR
2 stops21h 35mSWISS
Deal found 7/29$666
This Etihad Airways deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/89:30 amLHR - SIN
1 stop17h 10mEtihad Airways
Tue 9/239:10 pmSIN - LHR
1 stop16h 50mEtihad Airways
Deal found 7/28$682
This Booking.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:25 pmLHR - BKK
1 stop20h 45mAir China
Thu 12/45:55 pmBKK - LHR
2 stops30h 55mAir China
Deal found 7/28$682
This China Southern deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Southern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/279:00 pmLHR - BKK
2 stops22h 30mChina Southern
Sat 10/253:05 pmBKK - LHR
1 stop34h 10mChina Southern
Deal found 7/27$683
This Oman Air deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Oman Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/118:50 pmLHR - BKK
1 stop14h 55mOman Air
Mon 9/229:00 amBKK - LHR
1 stop16h 10mOman Air
Deal found 7/29$684
This Austrian Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/27:30 pmLHR - BKK
1 stop13h 20mAustrian Airlines
Thu 9/1811:40 pmBKK - LHR
1 stop14h 40mAustrian Airlines
Deal found 7/28$685
This Shenzhen Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:10 pmLHR - BKK
1 stop31h 00mShenzhen Airlines
Sat 11/2212:10 pmBKK - LHR
1 stop38h 00mShenzhen Airlines
Deal found 7/28$686

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Heathrow

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Mon 9/1

10:05 pm-8:40 am

1 stop28h 35m

Hanoi Noibai

Sun 9/7

2:10 am-7:50 pm

1 stop23h 40m

$652

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 11/4

4:40 pm-5:25 pm

1 stop16h 45m

Singapore Changi

Sat 11/22

11:45 pm-8:05 am

1 stop16h 20m

$658

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 9/22

10:05 pm-2:30 am

1 stop21h 25m

Singapore Changi

Fri 9/26

6:10 pm-7:50 pm

1 stop32h 40m

$659

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 9/12

10:05 pm-2:30 am

1 stop21h 25m

Singapore Changi

Sun 9/21

12:05 pm-7:30 pm

2 stops38h 25m

$661

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 9/30

8:35 pm-9:45 pm

1 stop18h 10m

Singapore Changi

Mon 10/6

8:45 am-7:00 pm

1 stop17h 15m

$663

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 11/4

6:40 pm-6:00 pm

1 stop15h 20m

Singapore Changi

Sat 11/15

12:05 am-1:40 pm

2 stops21h 35m

$666

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 1/15

7:20 pm-9:05 am

1 stop29h 45m

Singapore Changi

Tue 3/3

8:40 pm-2:30 pm

1 stop25h 50m

$671

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 9/27

9:00 pm-1:30 am

2 stops22h 30m

Bangkok Suvarnabhumi

Sat 10/25

3:05 pm-7:15 pm

1 stop34h 10m

$683

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 9/11

8:50 pm-5:45 pm

1 stop14h 55m

Bangkok Suvarnabhumi

Sun 9/21

7:10 pm-7:10 pm

1 stop30h 00m

$684

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 9/2

7:30 pm-2:50 pm

1 stop13h 20m

Bangkok Suvarnabhumi

Thu 9/18

11:40 pm-8:20 am

1 stop14h 40m

$685

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 60 results
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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 round-trip 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $946). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $1,563). 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?

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 July 29, 2025.

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

Explore weekly flight availability from Heathrow to Southeast Asia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

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

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated July 29, 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Southeast Asia, such as China Airlines, Hainan Airlines, and Garuda Indonesia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
754 reviews

Comfort

8.0

Boarding

8.3

Overall

8.3

Entertainment

8.0

Food

7.8

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Airlines
8.3
Very good
754 reviews
China Airlines
8.3
Very good
754 reviews

Comfort

8.0

Boarding

8.3

Overall

8.3

Entertainment

8.0

Food

7.8

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Hainan Airlines
8.2
Very good
43 reviews
China Airlines
8.3
Very good
754 reviews

Comfort

8.0

Boarding

8.3

Overall

8.3

Entertainment

8.0

Food

7.8

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Garuda Indonesia
8.1
Very good
78 reviews
China Airlines
8.3
Very good
754 reviews

Comfort

8.0

Boarding

8.3

Overall

8.3

Entertainment

8.0

Food

7.8

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Singapore Airlines
8.1
Very good
1,335 reviews
China Airlines
8.3
Very good
754 reviews

Comfort

8.0

Boarding

8.3

Overall

8.3

Entertainment

8.0

Food

7.8

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

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.

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

    The cheapest airline one-way is China Southern, with whom users have recently found tickets for as low as $422. However, be on the lookout for offers from Air India and Oman Air, 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?

    The most popular route from London Heathrow Airport to Southeast Asia is London Heathrow - Bangkok Suvarnabhumi. You may also consider London Heathrow - Langkawi or London Heathrow - Manila Ninoy Aquino Intl.

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

    Before booking your flight to Southeast Asia from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: EVA Air (85%), Thai Airways (82%), Air Canada( 77%).

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

    On average you can expect to pay $2,705 for a flight from London Heathrow Airport to Southeast Asia. The cheapest flight overall is $550 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $469.

  • 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 vacation 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $946). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $1,563). 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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Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Heathrow to Southeast Asia

Discover the top 10 airlines that operate flights from Heathrow to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest$407Average$840FlexibilityNo cancel feeOn-time86%
Shenzhen AirlinesCheapest$457Average$583FlexibilityNo cancel feeOn-time63%
Gulf AirCheapest$514Average$794FlexibilityNo cancel feeOn-time67%
China EasternCheapest$533Average$693FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$540Average$732FlexibilityNo cancel feeOn-time69%
Hainan AirlinesCheapest$560Average$636FlexibilityNo cancel feeOn-time61%
Air IndiaCheapest$590Average$900FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$620Average$942FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$673Average$1,152FlexibilityNo cancel feeOn-time78%
Oman AirCheapest$686Average$808FlexibilityNo cancel feeOn-time76%

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