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Cheap flights from London to Southeast Asia from $588

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
23 Aug — 30 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Southeast Asia

Enter your travel dates to find the best prices.

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 24 July 2026.

Fri 18/911:35
LGW
-
BKK
1 stop18h 55m
China Eastern
Fri 16/1021:55
BKK
-
LGW
1 stop23h 05m
China Eastern
Deal found 23/7$913
Thu 17/921:20
LHR
-
BKK
2 stops21h 50m
China Eastern
Tue 13/1003:00
BKK
-
LHR
2 stops21h 40m
China Eastern
Deal found 23/7$913
Sat 26/918:00
LGW
-
BKK
2 stops22h 15m
China Eastern
Mon 12/1015:55
BKK
-
LGW
3 stops53h 05m
China Eastern
Deal found 24/7$914
Fri 2/1021:20
LHR
-
BKK
3 stops35h 35m
China Eastern
Sun 11/1020:50
BKK
-
LHR
2 stops51h 50m
China Eastern
Deal found 20/7$914
Sun 15/1110:30
LGW
-
BKK
1 stop24h 55m
China Eastern
Mon 23/1116:50
BKK
-
LGW
1 stop20h 40m
China Eastern
Deal found 20/7$916
Sun 20/917:55
LGW
-
BKK
1 stop18h 10m
China Eastern
Mon 19/1019:10
BKK
-
LGW
1 stop25h 50m
China Eastern
Deal found 21/7$917
Sun 6/1217:00
LGW
-
BKK
2 stops22h 35m
China Eastern
Thu 4/307:50
BKK
-
LGW
3 stops37h 10m
China Eastern
Deal found 21/7$919
Tue 8/911:15
LGW
-
BKK
1 stop31h 10m
Multiple Airlines
Sat 12/901:30
BKK
-
LGW
1 stop23h 20m
Multiple Airlines
Deal found 23/7$921
Mon 30/1117:00
LGW
-
BKK
1 stop17h 50m
China Eastern
Mon 21/1221:05
BKK
-
LGW
2 stops47h 55m
China Eastern
Deal found 24/7$923
Wed 25/1110:30
LGW
-
BKK
1 stop24h 20m
China Eastern
Wed 9/1221:05
BKK
-
LGW
3 stops40h 25m
China Eastern
Deal found 22/7$924
Thu 12/1121:00
LHR
-
BKK
2 stops34h 55m
China Eastern
Sat 14/1101:55
BKK
-
LHR
1 stop22h 35m
China Eastern
Deal found 21/7$924
Mon 2/1110:30
LGW
-
BKK
1 stop18h 50m
China Eastern
Mon 23/1121:05
BKK
-
LGW
3 stops40h 25m
China Eastern
Deal found 20/7$926

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 24 July 2026.

Round-trip from

$913

One-way from

$585

Popular in

December

Cheapest in

September

Average price

$1,527
China Eastern
  • China Eastern
  • 18/9-23/10
  • 2 total stops
  • 43h 45m total
  • London to Southeast Asia
Search Deals
China Eastern
  • China Eastern
  • 8/9
  • 3 total stops
  • 26h 15m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($123 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($55 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 24 July 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 return flight

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 22/11

10:30-20:10

2 stops26h 40m

Bangkok Suvarnabhumi

Thu 3/12

19:05-14:00

1 stop25h 55m

$926

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 30/11

21:00-04:05

1 stop24h 05m

Bangkok Suvarnabhumi

Sun 13/12

07:50-17:30

2 stops40h 40m

$983

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 10/1

10:30-12:20

1 stop18h 50m

Bangkok Suvarnabhumi

Tue 19/1

01:55-06:30

1 stop35h 35m

$990

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 20/11

10:30-12:20

1 stop18h 50m

Bangkok Suvarnabhumi

Tue 24/11

03:10-06:30

2 stops34h 20m

$1,003

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 7/9

22:00-19:50

2 stops39h 50m

Bangkok Suvarnabhumi

Wed 9/9

02:10-06:40

2 stops34h 30m

$1,049

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 4/9

18:00-22:15

2 stops22h 15m

Bangkok Suvarnabhumi

Sun 13/9

05:05-19:15

1 stop20h 10m

$1,099

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 1/9

18:00-22:15

2 stops22h 15m

Bangkok Suvarnabhumi

Wed 9/9

16:50-06:40

1 stop19h 50m

$1,100

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 1/11

06:40-10:35

1 stop20h 55m

Bangkok Suvarnabhumi

Sun 15/11

12:35-09:35

2 stops28h 00m

$1,173

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 28/9

09:55-09:30

1 stop17h 35m

Bangkok Suvarnabhumi

Mon 12/10

12:05-07:55

2 stops25h 50m

$1,199

LondonKuala Lumpur

LCY - KUL

LCYKUL

London City

Wed 6/1

09:50-16:40

1 stop22h 50m

Kuala Lumpur Intl

Thu 21/1

23:55-09:15

1 stop17h 20m

$1,236

Flights are sorted by cheapest return flights first.

Deals found on 20/7

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 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 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 $1,176). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,957). 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 24 July 2026.

When flying from London to Southeast Asia, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 40% versus a flight in the afternoon.

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 24 July 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?

The price you pay for your flight from London to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 50 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

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 24 July 2026.
See what other customers who have flown with Etihad Airways from London to Southeast Asia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Etihad Airways
7.3
Good
1,486 reviews
Check prices

Overall

7.3

Crew

7.8

Food

7.2

Boarding

7.6

Entertainment

7.2

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,June 2026

AUH - KBL

really liked the excellent customer service, friendly staff, smooth check-in process, and comfortable flight. Everyone was professional and helpful, which made my journey enjoyable and stress-free.
Etihad Airways
7.3
Good
1,486 reviews
Etihad Airways
7.3
Good
1,486 reviews
Check prices

Overall

7.3

Crew

7.8

Food

7.2

Boarding

7.6

Entertainment

7.2

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,June 2026

AUH - KBL

really liked the excellent customer service, friendly staff, smooth check-in process, and comfortable flight. Everyone was professional and helpful, which made my journey enjoyable and stress-free.

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?

    China Eastern, Etihad Airways, and Scandinavian Airlines can get you from London to Southeast Asia in just under 20h 55m. Your travel time can differ by up to 12h 30m. Airlines will cover a distance of 9571 km. Both multi-stop and direct flights can be found to your destination and back.

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

    While some choose either London Stansted - Denpasar Bali Ngurah Rai or London City - Phuket City, London City - Denpasar Bali Ngurah Rai is the most popular route from London to Southeast Asia.

  • 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: EVA Air (91%), Thai Airways (91%), Air Canada (87%).

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

    On average you can expect to pay $2,174 for a flight from London to Southeast Asia. The cheapest flight overall is $1,266 while the most popular route, (London City - Denpasar Bali Ngurah Rai) is currently priced at $873.

  • 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 holiday 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 $1,176). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,957). 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

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Alternative routes for London to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Suvarnabhumi flights
Gatwick to Suvarnabhumi flights
Heathrow to Singapore flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Southeast Asia?

When you search for this flight from London 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 London to Southeast Asia?

Cheapflights helps you find that perfect flight to Southeast Asia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Southeast Asia with no change fees?

Yes! Cheapflights helps users easily find flights from London to Southeast Asia with no change fees.

Can Cheapflights notify me if prices for flights from London to Southeast Asia become cheaper?

Not ready to book yet? You can track prices for flights from London to Southeast Asia on Cheapflights with our Price Alert feature and get notified when better prices are available.

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