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Southeast Asia

$331+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheap 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 December 21, 2025.

This FlightHub deal was found by Cheapflights users on 12/21. 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 12/3010:10 pmLHR - BKK
1 stop31h 20mAir China
Fri 1/235:55 pmBKK - LHR
1 stop32h 45mAir China
Deal found 12/21$609
This Shenzhen Airlines deal was found by Cheapflights users on 12/19. 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.
Wed 12/319:10 pmLHR - HAN
1 stop21h 00mShenzhen Airlines
Sun 1/187:40 pmHAN - LHR
1 stop30h 30mShenzhen Airlines
Deal found 12/19$623
This Air China deal was found by Cheapflights users on 12/20. 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 Air China is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/279:35 pmLHR - BKK
1 stop31h 55mAir China
Thu 2/51:30 amBKK - LHR
1 stop21h 25mAir China
Deal found 12/20$676
This Gotogate deal was found by Cheapflights users on 12/19. 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 12/299:00 pmLHR - KUL
2 stops30h 10mMultiple Airlines
Thu 3/59:35 amKUL - LHR
1 stop16h 35mMultiple Airlines
Deal found 12/19$766
This FlightHub deal was found by Cheapflights users on 12/21. 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.
Fri 12/269:00 pmLHR - BKK
1 stop24h 05mChina Eastern
Mon 2/25:05 amBKK - LHR
1 stop19h 25mChina Eastern
Deal found 12/21$775
This Trip.com deal was found by Cheapflights users on 12/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/289:30 pmLHR - BKK
1 stop29h 20mMultiple Airlines
Tue 2/311:10 amBKK - LHR
1 stop36h 10mMultiple Airlines
Deal found 12/20$785
This Shenzhen Airlines deal was found by Cheapflights users on 12/19. 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.
Sun 12/289:10 pmLHR - KUL
1 stop38h 20mShenzhen Airlines
Sun 1/188:30 pmKUL - LHR
1 stop30h 40mShenzhen Airlines
Deal found 12/19$789
This Shenzhen Airlines deal was found by Cheapflights users on 12/19. 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.
Sun 12/289:10 pmLHR - HAN
1 stop28h 30mShenzhen Airlines
Fri 1/232:10 amHAN - LHR
1 stop24h 00mShenzhen Airlines
Deal found 12/19$793
This FlightHub deal was found by Cheapflights users on 12/19. 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.
Mon 12/228:25 amLHR - BKK
1 stop15h 20mOman Air
Wed 1/78:05 pmBKK - LHR
1 stop29h 20mOman Air
Deal found 12/19$825
This SAUDIA deal was found by Cheapflights users on 12/20. 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 SAUDIA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:15 pmLHR - HKT
1 stop23h 15mSAUDIA
Wed 1/213:15 pmHKT - LHR
1 stop23h 15mSAUDIA
Deal found 12/20$831
This FlightHub deal was found by Cheapflights users on 12/21. 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 12/309:00 pmLHR - MNL
1 stop20h 00mChina Eastern
Mon 1/192:05 amMNL - LHR
1 stop23h 25mChina Eastern
Deal found 12/21$846
This FlightHub deal was found by Cheapflights users on 12/21. 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.
Sun 12/289:00 pmLHR - BKK
1 stop20h 55mChina Eastern
Sun 2/87:05 pmBKK - LHR
1 stop29h 25mChina Eastern
Deal found 12/21$856

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 December 21, 2025.

Round-trip from

$534
(FlightHub)

One-way from

$331
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$1,247
From London Heathrow to Southeast Asia
Search Deals
One-way flight from London Heathrow to Southeast Asia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 21, 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

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sat 5/16

1:15 pm-7:55 pm

1 stop24h 40m

Ho Chi Minh City

Wed 6/3

8:55 pm-12:05 pm

1 stop21h 10m

$604

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sat 5/23

9:45 am-7:55 pm

1 stop28h 10m

Ho Chi Minh City

Wed 6/10

8:55 pm-7:30 am

1 stop16h 35m

$604

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Fri 3/6

9:10 pm-1:50 am

1 stop21h 40m

Ho Chi Minh City

Fri 3/20

2:50 am-7:10 pm

1 stop23h 20m

$616

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Mon 3/2

9:10 pm-1:50 am

1 stop21h 40m

Ho Chi Minh City

Sun 3/15

2:50 am-7:10 pm

1 stop23h 20m

$616

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Wed 1/14

9:10 pm-1:50 am

1 stop21h 40m

Ho Chi Minh City

Sun 1/25

2:50 am-7:10 pm

1 stop23h 20m

$617

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Sat 1/17

9:10 pm-1:50 am

1 stop21h 40m

Ho Chi Minh City

Fri 1/23

2:50 am-7:10 pm

1 stop23h 20m

$617

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Sat 1/10

9:10 pm-1:10 am

1 stop21h 00m

Hanoi Noibai

Sat 1/24

7:40 pm-7:10 pm

1 stop30h 30m

$621

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 2/12

9:00 pm-10:45 pm

1 stop18h 45m

Phuket City

Sun 2/15

12:05 am-5:30 pm

1 stop24h 25m

$688

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Thu 1/22

8:55 pm-7:35 pm

1 stop14h 40m

Kuala Lumpur Intl

Mon 2/2

9:35 am-6:10 pm

1 stop16h 35m

$705

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Tue 1/20

7:20 pm-7:35 pm

1 stop16h 15m

Kuala Lumpur Intl

Wed 2/4

9:35 am-6:10 pm

1 stop16h 35m

$705

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $498). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of $734). 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 December 21, 2025.

It’s typically best to fly out from London Heathrow Airport to Southeast Asia in the afternoon. Doing so could potentially save you 17% on the flight price compared to flying in the morning, which is usually more expensive.

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

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

Travelers seeking maximum savings on their London Heathrow Airport to Southeast Asia flight should consider departing on Sunday afternoons when fares are most often at their lowest. Sunday 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

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 December 21, 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 December 21, 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Southeast Asia, such as Singapore Airlines, Thai Airways, and China Southern. 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.
Singapore Airlines
8.1
Very good
1,414 reviews

Overall

8.1

Boarding

8.3

Entertainment

8.0

Crew

8.6

Comfort

8.0

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 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
1,414 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Overall

8.1

Boarding

8.3

Entertainment

8.0

Crew

8.6

Comfort

8.0

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Thai Airways
7.8
Good
369 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Overall

8.1

Boarding

8.3

Entertainment

8.0

Crew

8.6

Comfort

8.0

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
China Southern
7.5
Good
122 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Overall

8.1

Boarding

8.3

Entertainment

8.0

Crew

8.6

Comfort

8.0

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 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
3,685 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Overall

8.1

Boarding

8.3

Entertainment

8.0

Crew

8.6

Comfort

8.0

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 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
131 reviews
Singapore Airlines
8.1
Very good
1,414 reviews

Overall

8.1

Boarding

8.3

Entertainment

8.0

Crew

8.6

Comfort

8.0

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 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

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?

    A quick flight from London Heathrow Airport to Southeast Asia can take about 19h. Air India provides one of the quickest options available for as low as $629. There are 6757 mi between London Heathrow Airport and Southeast Asia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airline one-way is SAUDIA, with whom users have recently found tickets for as low as $292. However, be on the lookout for offers from Shenzhen Airlines and China Eastern, 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 (88%), Thai Airways (84%), Air Canada( 80%).

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

    On average you can expect to pay $2,292 for a flight from London Heathrow Airport to Southeast Asia. The cheapest flight overall is $636 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $521.

  • 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $498). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of $734). 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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Gatwick to Pu Dong flights
Heathrow to Karachi flights
Heathrow to Capital flights
Heathrow to Islamabad flights

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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest$407Average$838FlexibilityNo cancel feeOn-time86%
Gulf AirCheapest$462Average$772FlexibilityNo cancel feeOn-time67%
Air IndiaCheapest$472Average$832FlexibilityNo cancel feeOn-timeN/A
Shenzhen AirlinesCheapest$494Average$557FlexibilityNo cancel feeOn-time63%
China EasternCheapest$539Average$708FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$559Average$695FlexibilityNo cancel feeOn-time69%
Hainan AirlinesCheapest$560Average$848FlexibilityNo cancel feeOn-time61%
British AirwaysCheapest$620Average$939FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$641Average$925FlexibilityNo cancel feeOn-time78%
Oman AirCheapest$657Average$817FlexibilityNo cancel feeOn-time76%

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