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Southeast Asia

$391+ Cheap flights from London (LON) 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
Jul 18 — Jul 251
Sat 7/18
Sat 7/25
1 adult, Economy
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Cheap flight deals from London to Southeast Asia

Cheapest flights from London to Southeast Asia
Explore the most affordable flight options available from London to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2026.

This FlightHub deal was found by Cheapflights users on 6/18. 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 11/205:00 pm
LGW
-
BKK
2 stops38h 55m
China Eastern
Sun 12/63:55 pm
BKK
-
LGW
2 stops29h 05m
China Eastern
Deal found 6/18$622
This FlightHub deal was found by Cheapflights users on 6/17. 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 11/225:00 pm
LGW
-
BKK
2 stops27h 05m
China Eastern
Sun 12/63:55 pm
BKK
-
LGW
2 stops29h 05m
China Eastern
Deal found 6/17$623
This Justfly.com deal was found by Cheapflights users on 6/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1410:05 pm
LHR
-
BKK
1 stop31h 05m
Shenzhen Airlines
Sun 9/203:15 am
BKK
-
LHR
1 stop22h 35m
Shenzhen Airlines
Deal found 6/15$624
This Shenzhen Airlines deal was found by Cheapflights users on 6/15. 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.
Fri 11/209:10 pm
LHR
-
BKK
1 stop31h 00m
Shenzhen Airlines
Sun 11/2912:10 pm
BKK
-
LHR
1 stop38h 00m
Shenzhen Airlines
Deal found 6/15$625
This China Eastern deal was found by Cheapflights users on 6/17. 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 Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:30 am
LGW
-
BKK
1 stop31h 25m
China Eastern
Mon 3/11:55 am
BKK
-
LGW
1 stop35h 35m
China Eastern
Deal found 6/17$626
This Shenzhen Airlines deal was found by Cheapflights users on 6/18. 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 9/510:05 pm
LHR
-
BKK
1 stop31h 05m
Shenzhen Airlines
Sun 9/203:15 am
BKK
-
LHR
1 stop22h 35m
Shenzhen Airlines
Deal found 6/18$626
This Priceline deal was found by Cheapflights users on 6/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:30 am
LGW
-
BKK
1 stop18h 50m
China Eastern
Thu 12/101:55 am
BKK
-
LGW
1 stop35h 35m
China Eastern
Deal found 6/16$627
This Shenzhen Airlines deal was found by Cheapflights users on 6/16. 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 11/49:10 pm
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Sun 11/2912:10 pm
BKK
-
LHR
1 stop38h 00m
Shenzhen Airlines
Deal found 6/16$627
This China Eastern deal was found by Cheapflights users on 6/13. 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 Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:30 am
LGW
-
BKK
1 stop18h 50m
China Eastern
Sun 11/221:55 am
BKK
-
LGW
1 stop35h 35m
China Eastern
Deal found 6/13$628
This Shenzhen Airlines deal was found by Cheapflights users on 6/16. 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 11/49:10 pm
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Fri 11/203:15 am
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 6/16$628
This China Eastern deal was found by Cheapflights users on 6/16. 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 Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:00 pm
LGW
-
BKK
1 stop24h 55m
China Eastern
Tue 3/21:35 pm
BKK
-
LGW
1 stop31h 25m
China Eastern
Deal found 6/16$629
This Shenzhen Airlines deal was found by Cheapflights users on 6/16. 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 9/1210:05 pm
LHR
-
BKK
1 stop22h 10m
Shenzhen Airlines
Tue 9/223:15 am
BKK
-
LHR
1 stop22h 45m
Shenzhen Airlines
Deal found 6/16$629

Find flight deals from London to Southeast Asia

Keep the following information in mind while searching for London to Southeast Asia flight deals. Data was last updated June 18, 2026.

Round-trip from

$623
(FlightHub)

One-way from

$391
(China Eastern)

Popular in

December

Cheapest in

November

Average price

$877
From London (LON) to Southeast Asia
Search Deals
One-way flight from London (LON) to Southeast Asia
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 June 18, 2026.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 11/25

9:10 pm-11:10 am

1 stop31h 00m

Bangkok Suvarnabhumi

Sun 11/29

12:10 pm-7:10 pm

1 stop38h 00m

$625

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 11/12

10:30 am-12:20 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Sat 11/21

3:55 pm-2:00 pm

3 stops53h 05m

$635

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 11/25

5:00 pm-12:20 pm

1 stop36h 20m

Bangkok Suvarnabhumi

Sun 11/29

3:55 pm-6:30 am

2 stops45h 35m

$669

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 11/25

9:00 pm-12:20 pm

1 stop32h 20m

Bangkok Suvarnabhumi

Sun 11/29

3:55 pm-5:30 pm

2 stops32h 35m

$707

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 9/14

10:05 pm-11:10 am

1 stop31h 05m

Bangkok Suvarnabhumi

Sun 9/20

3:15 am-7:50 pm

1 stop22h 35m

$712

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 10/8

9:00 am-6:20 am

1 stop15h 20m

Bangkok Suvarnabhumi

Thu 10/22

8:00 pm-6:40 am

1 stop16h 40m

$762

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 11/11

6:45 pm-4:05 pm

Nonstop13h 20m

Singapore Changi

Sun 11/15

11:15 pm-5:45 am

Nonstop14h 30m

$801

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 11/12

9:05 pm-10:40 am

2 stops30h 35m

Bangkok Suvarnabhumi

Sun 11/29

12:35 pm-12:55 pm

2 stops31h 20m

$801

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 10/1

7:25 pm-4:10 pm

Nonstop13h 45m

Singapore Changi

Tue 10/13

11:25 pm-6:35 am

Nonstop14h 10m

$802

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 11/4

6:45 pm-4:05 pm

Nonstop13h 20m

Singapore Changi

Wed 11/18

11:15 pm-5:45 am

Nonstop14h 30m

$803

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from London to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from London 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 to Southeast Asia

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

Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of $819). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,377). 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 LON to YJX?

Find hourly flight availability from London 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 June 18, 2026.

A simple way to save on the total cost of your ticket is to fly from London to Southeast Asia in the afternoon. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight at noon.

Weekly flight availability from London to Southeast Asia

Explore weekly flight availability from London 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 June 18, 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (11 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 to Southeast Asia?

To ensure you get the cheapest price possible for a flight from London to Southeast Asia, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 June 18, 2026.
Read through reviews of airlines operating flights from London to Southeast Asia, such as Singapore Airlines,Qatar Airways, andEtihad Airways. 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
8.2
Very good
1,545 reviews

Boarding

8.3

Crew

8.6

Overall

8.2

Comfort

8.0

Entertainment

8.1

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.2
Very good
1,545 reviews
Singapore Airlines
8.2
Very good
1,545 reviews

Boarding

8.3

Crew

8.6

Overall

8.2

Comfort

8.0

Entertainment

8.1

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Qatar Airways
7.3
Good
3,727 reviews
Singapore Airlines
8.2
Very good
1,545 reviews

Boarding

8.3

Crew

8.6

Overall

8.2

Comfort

8.0

Entertainment

8.1

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Etihad Airways
7.3
Good
1,453 reviews
Singapore Airlines
8.2
Very good
1,545 reviews

Boarding

8.3

Crew

8.6

Overall

8.2

Comfort

8.0

Entertainment

8.1

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
China Eastern
7.3
Good
223 reviews
Singapore Airlines
8.2
Very good
1,545 reviews

Boarding

8.3

Crew

8.6

Overall

8.2

Comfort

8.0

Entertainment

8.1

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Air China
7.3
Good
155 reviews
Singapore Airlines
8.2
Very good
1,545 reviews

Boarding

8.3

Crew

8.6

Overall

8.2

Comfort

8.0

Entertainment

8.1

Food

7.8

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

Related info for your journey

Find useful and relevant information for your journey from London 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 to Southeast Asia?

    Shenzhen Airlines, China Eastern, and Qatar Airways can get you from London to Southeast Asia in just under 15h 20m. Your travel time can differ by up to 15h 40m. The distance from London to Southeast Asia is about 5942 mi. 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 to Southeast Asia one-way?

    To fly one-way, consider booking your trip with Shenzhen Airlines, which is currently one of the cheapest options available, starting at $207. China Eastern flights start at $328 while deals on Hainan Airlines start at $357 one-way.

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

    When deciding which route to take from London to Southeast Asia consider London Heathrow - Bangkok Suvarnabhumi, London Gatwick - Bangkok Suvarnabhumi or London Heathrow - Manila Ninoy Aquino Intl as they are the most popular.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Southeast Asia on time: Thai Airways (92%), EVA Air (90%), Air Canada (89%).

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

    On average you can expect to pay $2,360 for a flight from London to Southeast Asia. The cheapest flight overall is $681 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $609.

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

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

  • How can I find direct flights from London to Southeast Asia?

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

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

    Yes. Cheapflights offers flight deals from London 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 to Southeast Asia?

    Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of $819). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,377). 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

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

Top 10 airlines flying from London to Southeast Asia

Discover the top 10 airlines that operate flights from London 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 June 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Gulf AirCheapest$462Average$890FlexibilityNo cancel feeOn-time67%
Air IndiaCheapest$472Average$815FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$490Average$706FlexibilityNo cancel feeOn-time62%
Shenzhen AirlinesCheapest$494Average$612FlexibilityNo cancel feeOn-time63%
Norse Atlantic UKCheapest$534Average$732FlexibilityNo cancel feeOn-timeN/A
China SouthernCheapest$535Average$706FlexibilityNo cancel feeOn-time69%
SAUDIACheapest$544Average$834FlexibilityNo cancel feeOn-time86%
CondorCheapest$562Average$608FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$641Average$885FlexibilityNo cancel feeOn-time78%
Oman AirCheapest$657Average$847FlexibilityNo cancel feeOn-time76%

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