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Southeast Asia

$366+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
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 March 22, 2026.

This Mytrip deal was found by Cheapflights users on 3/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/119:20 pm
LHR
-
HAN
1 stop34h 40m
China Eastern
Mon 5/183:00 pm
HAN
-
LHR
1 stop33h 40m
China Eastern
Deal found 3/20$556
This Mytrip deal was found by Cheapflights users on 3/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:20 pm
LHR
-
HAN
1 stop38h 25m
China Eastern
Tue 5/126:45 pm
HAN
-
LHR
1 stop29h 55m
China Eastern
Deal found 3/21$562
This Booking.com deal was found by Cheapflights users on 3/22. 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.
Wed 5/1310:05 pm
LHR
-
BKK
1 stop22h 10m
Shenzhen Airlines
Tue 5/263:15 am
BKK
-
LHR
1 stop22h 45m
Shenzhen Airlines
Deal found 3/22$568
This Booking.com deal was found by Cheapflights users on 3/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:15 pm
LHR
-
BKK
1 stop15h 30m
SAUDIA
Sun 5/243:25 pm
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 3/21$569
This Justfly.com deal was found by Cheapflights users on 3/22. 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.
Fri 5/14:15 pm
LHR
-
BKK
1 stop15h 30m
SAUDIA
Sun 5/173:25 pm
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 3/22$570
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/63:35 pm
LGW
-
BKK
1 stop15h 00m
Condor
Thu 9/1710:35 pm
BKK
-
LGW
1 stop16h 55m
Condor
Deal found 3/20$571
This China Eastern deal was found by Cheapflights users on 3/20. 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 China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:20 pm
LHR
-
BKK
1 stop21h 20m
China Eastern
Wed 5/135:05 am
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 3/20$571
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/193:45 pm
LGW
-
BKK
1 stop14h 50m
Condor
Sat 7/410:35 pm
BKK
-
LGW
1 stop22h 05m
Condor
Deal found 3/18$572
This China Eastern deal was found by Cheapflights users on 3/20. 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 China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/209:20 pm
LHR
-
HAN
1 stop22h 00m
China Eastern
Tue 5/192:20 am
HAN
-
LHR
1 stop22h 20m
China Eastern
Deal found 3/20$572
This China Eastern deal was found by Cheapflights users on 3/18. 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 China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/279:20 pm
LHR
-
BKK
1 stop33h 10m
China Eastern
Wed 5/135:05 am
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 3/18$572
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:45 pm
LGW
-
BKK
1 stop14h 50m
Condor
Sat 9/1910:35 pm
BKK
-
LGW
1 stop16h 25m
Condor
Deal found 3/20$573
This China Eastern deal was found by Cheapflights users on 3/18. 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 China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/149:20 pm
LHR
-
HAN
1 stop22h 00m
China Eastern
Sun 5/173:00 pm
HAN
-
LHR
1 stop33h 40m
China Eastern
Deal found 3/18$573

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 March 22, 2026.

Round-trip from

$556
(Mytrip)

One-way from

$366
(Booking.com)

Popular in

December

Cheapest in

May

Average price

$928
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. 5% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 22, 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

Mon 4/27

10:05 pm-11:10 am

1 stop31h 05m

Bangkok Suvarnabhumi

Sat 5/9

12:10 pm-8:00 pm

1 stop37h 50m

$581

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 4/27

10:05 pm-2:15 am

1 stop22h 10m

Bangkok Suvarnabhumi

Sun 5/10

3:15 am-7:50 pm

1 stop22h 35m

$584

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 4/29

9:20 pm-2:45 pm

2 stops59h 25m

Hanoi Noibai

Sat 5/9

3:45 pm-6:40 pm

3 stops56h 55m

$587

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 6/4

11:35 am-3:50 pm

1 stop22h 15m

Bangkok Suvarnabhumi

Mon 6/8

7:10 pm-3:00 pm

1 stop25h 50m

$620

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 5/6

6:00 pm-1:15 am

2 stops25h 15m

Bangkok Suvarnabhumi

Tue 5/12

2:10 am-3:00 pm

1 stop18h 50m

$627

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Fri 6/12

10:05 pm-9:40 am

1 stop29h 35m

Hanoi Noibai

Sat 6/27

6:40 pm-8:00 pm

1 stop31h 20m

$634

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Sat 5/2

10:05 pm-9:40 am

1 stop29h 35m

Hanoi Noibai

Fri 5/8

2:10 am-7:50 pm

1 stop23h 40m

$636

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 5/5

9:20 pm-10:00 pm

1 stop18h 40m

Phuket City

Wed 5/13

12:05 am-6:40 pm

1 stop24h 35m

$658

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 5/13

9:20 pm-2:45 pm

2 stops35h 25m

Hanoi Noibai

Sun 6/14

2:20 am-6:40 pm

1 stop22h 20m

$666

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 4/7

2:55 pm-7:25 pm

1 stop22h 30m

Bangkok Suvarnabhumi

Mon 6/8

7:40 pm-6:40 am

1 stop17h 00m

$751

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 $407). Flying from London to Southeast Asia in July is currently the most expensive (average of $558). 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 March 22, 2026.

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

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 March 22, 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 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 March 22, 2026.
Read through reviews of airlines operating flights from London to Southeast Asia, such as Singapore Airlines,Qatar Airways, andChina 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
8.2
Very good
1,484 reviews

Comfort

8.0

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

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
1,484 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Comfort

8.0

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

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
7.4
Good
3,733 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Comfort

8.0

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
China Southern
7.4
Good
145 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Comfort

8.0

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

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
142 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Comfort

8.0

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

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
7.2
Good
198 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Comfort

8.0

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

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 Etihad Airways can get you from London to Southeast Asia in just under 15h 30m. Your travel time can differ by up to 43h 55m. The distance from London to Southeast Asia is about 5947 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. SAUDIA flights start at $292 while deals on China Eastern start at $328 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 Heathrow - Langkawi or London Gatwick - Bangkok Suvarnabhumi 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 (88%), Air Canada (86%), EVA Air (84%).

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

    On average you can expect to pay $2,436 for a flight from London to Southeast Asia. The cheapest flight overall is $521 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $532.

  • 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 $407). Flying from London to Southeast Asia in July is currently the most expensive (average of $558). 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest$403Average$830FlexibilityNo cancel feeOn-time86%
Hainan AirlinesCheapest$434Average$709FlexibilityNo cancel feeOn-time61%
Air IndiaCheapest$472Average$801FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$490Average$683FlexibilityNo cancel feeOn-time62%
Shenzhen AirlinesCheapest$494Average$584FlexibilityNo cancel feeOn-time63%
Norse Atlantic UKCheapest$534Average$742FlexibilityNo cancel feeOn-timeN/A
China SouthernCheapest$540Average$686FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$602Average$973FlexibilityNo cancel feeOn-time70%
Gulf AirCheapest$625Average$822FlexibilityNo cancel feeOn-time67%
Austrian AirlinesCheapest$641Average$885FlexibilityNo cancel feeOn-time78%

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