Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from London to Southeast Asia from C$ 563

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Southeast Asia departing on 14/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London to Southeast Asia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:40 p.m. - 7:10 a.m.LGW-BKK
30h 30m1 stop
Multiple Airlines Logo
12:20 p.m. - 4:55 p.m.BKK-LGW
35h 35m1 stop
C$ 839Multiple Airlines
Find Deal
Fri, 28 Nov - Fri, 5 Dec
Air China Logo
11:05 a.m. - 1:30 a.m.LGW-BKK
31h 25m1 stop
Air China Logo
7:30 p.m. - 5:35 a.m.BKK-LGW
17h 05m1 stop
C$ 841Air China
Find Deal
Thu, 27 Nov - Thu, 4 Dec
Norse Atlantic UK Logo
4:00 p.m. - 10:25 a.m.LGW-BKK
11h 25mdirect
Norse Atlantic UK Logo
12:30 p.m. - 6:30 p.m.BKK-LGW
13h 00mdirect
C$ 846Norse Atlantic UK
Find Deal
Wed, 26 Nov - Wed, 3 Dec
China Eastern Logo
10:30 a.m. - 10:25 p.m.LGW-BKK
28h 55m1 stop
China Eastern Logo
4:50 p.m. - 6:30 a.m.BKK-LGW
20h 40m1 stop
C$ 860China Eastern
Find Deal
Tue, 11 Nov - Tue, 25 Nov
Austrian Airlines Logo
7:25 p.m. - 3:30 p.m.LHR-BKK
13h 05m1 stop
Austrian Airlines Logo
2:00 p.m. - 9:40 p.m.BKK-LHR
14h 40m1 stop
C$ 863Austrian Airlines
Find Deal
Tue, 6 Jan - Mon, 19 Jan
China Southern Logo
9:30 p.m. - 6:15 p.m.LHR-BKK
61h 45m2 stops
China Southern Logo
6:05 p.m. - 6:35 p.m.BKK-LHR
31h 30m1 stop
C$ 866China Southern
Find Deal
Thu, 27 Nov - Thu, 4 Dec
China Southern Logo
10:00 p.m. - 10:10 a.m.LHR-BKK
29h 10m1 stop
China Southern Logo
7:15 p.m. - 5:55 p.m.BKK-LHR
29h 40m2 stops
C$ 867China Southern
Find Deal
Thu, 20 Nov - Thu, 27 Nov
Norse Atlantic UK Logo
4:10 p.m. - 10:25 a.m.LGW-BKK
11h 15mdirect
Norse Atlantic UK Logo
12:30 p.m. - 6:30 p.m.BKK-LGW
13h 00mdirect
C$ 877Norse Atlantic UK
Find Deal
Sun, 16 Nov - Wed, 3 Dec
China Eastern Logo
5:00 p.m. - 1:15 a.m.LGW-BKK
25h 15m2 stops
China Eastern Logo
1:35 p.m. - 6:40 a.m.BKK-LGW
23h 05m1 stop
C$ 887China Eastern
Find Deal
Sun, 1 Feb - Tue, 31 Mar
Austrian Airlines Logo
7:25 p.m. - 3:30 p.m.LHR-BKK
13h 05m1 stop
Austrian Airlines Logo
2:00 p.m. - 9:40 p.m.BKK-LHR
14h 40m1 stop
C$ 986Austrian Airlines
Find Deal
Sat, 10 Jan - Mon, 19 Jan

Air China flights from London to Southeast Asia

Our best Air China deals on London to Southeast Asia flight tickets
Air China
27 Nov
LGW11:05 a.m.London Gatwick
31h 25m
1 stop
BKK1:30 a.m.Bangkok Suvarnabhumi
4 Dec
BKK7:30 p.m.Bangkok Suvarnabhumi
17h 05m
1 stop
LGW5:35 a.m.London Gatwick
C$ 841
Find similar
Air China
27 Nov
LHR5:40 p.m.London Heathrow
23h 30m
1 stop
BKK12:10 a.m.Bangkok Suvarnabhumi
3 Dec
BKK1:30 a.m.Bangkok Suvarnabhumi
23h 20m
1 stop
LHR5:50 p.m.London Heathrow
C$ 850
Find similar
Air China
9 Nov
LHR8:25 p.m.London Heathrow
37h 05m
1 stop
HKT4:30 p.m.Phuket City
15 Nov
HKT6:25 p.m.Phuket City
30h 25m
1 stop
LHR5:50 p.m.London Heathrow
C$ 1,156
Find similar

China Eastern flights from London to Southeast Asia

Our best China Eastern deals on London to Southeast Asia flight tickets
China Eastern
11 Nov
LGW10:30 a.m.London Gatwick
28h 55m
1 stop
BKK10:25 p.m.Bangkok Suvarnabhumi
25 Nov
BKK4:50 p.m.Bangkok Suvarnabhumi
20h 40m
1 stop
LGW6:30 a.m.London Gatwick
C$ 860
Find similar
China Eastern
1 Feb
LGW5:00 p.m.London Gatwick
25h 15m
2 stops
BKK1:15 a.m.Bangkok Suvarnabhumi
31 Mar
BKK1:35 p.m.Bangkok Suvarnabhumi
23h 05m
1 stop
LGW6:40 a.m.London Gatwick
C$ 887
Find similar
China Eastern
1 Feb
LGW10:30 a.m.London Gatwick
29h 05m
2 stops
BKK10:35 p.m.Bangkok Suvarnabhumi
31 Mar
BKK1:35 p.m.Bangkok Suvarnabhumi
23h 05m
1 stop
LGW6:40 a.m.London Gatwick
C$ 895
Find similar

momondo 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, momondo users made 96,600 searches. Data last updated 30 October 2025.
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

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 28/11

5:40 p.m.-7:10 a.m.

1 stop30h 30m

Bangkok Suvarnabhumi

Fri 5/12

12:20 p.m.-4:55 p.m.

1 stop35h 35m

C$ 839

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 27/11

11:05 a.m.-1:30 a.m.

1 stop31h 25m

Bangkok Suvarnabhumi

Thu 4/12

7:30 p.m.-5:35 a.m.

1 stop17h 05m

C$ 841

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 26/11

4:00 p.m.-10:25 a.m.

Nonstop11h 25m

Bangkok Suvarnabhumi

Wed 3/12

12:30 p.m.-6:30 p.m.

Nonstop13h 00m

C$ 846

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 11/11

10:30 a.m.-10:25 p.m.

1 stop28h 55m

Bangkok Suvarnabhumi

Tue 25/11

4:50 p.m.-6:30 a.m.

1 stop20h 40m

C$ 860

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 6/1

7:25 p.m.-3:30 p.m.

1 stop13h 05m

Bangkok Suvarnabhumi

Mon 19/1

2:00 p.m.-9:40 p.m.

1 stop14h 40m

C$ 863

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 27/11

9:30 p.m.-6:15 p.m.

2 stops61h 45m

Bangkok Suvarnabhumi

Thu 4/12

6:05 p.m.-6:35 p.m.

1 stop31h 30m

C$ 866

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 20/11

10:00 p.m.-10:10 a.m.

1 stop29h 10m

Bangkok Suvarnabhumi

Thu 27/11

7:15 p.m.-5:55 p.m.

2 stops29h 40m

C$ 867

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 16/11

4:10 p.m.-10:25 a.m.

Nonstop11h 15m

Bangkok Suvarnabhumi

Wed 3/12

12:30 p.m.-6:30 p.m.

Nonstop13h 00m

C$ 877

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 1/2

5:00 p.m.-1:15 a.m.

2 stops25h 15m

Bangkok Suvarnabhumi

Tue 31/3

1:35 p.m.-6:40 a.m.

1 stop23h 05m

C$ 887

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 10/1

7:25 p.m.-3:30 p.m.

1 stop13h 05m

Bangkok Suvarnabhumi

Mon 19/1

2:00 p.m.-9:40 p.m.

1 stop14h 40m

C$ 986

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Southeast Asia from

How to get the cheapest flight ticket from London to Southeast Asia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Southeast Asia?

The cheapest month to fly to Southeast Asia from London is in May. Flight prices, which tend to average around C$ 1,025, are often lower during this time because this is during the off-season. If you don’t want to visit Southeast Asia in May, then you should wait until November to fly from London, when ticket prices are also cheap, with an average price of C$ 1,044.

What is the cheapest day to depart on your flight to Southeast Asia?

The cheapest day to depart from London to Southeast Asia is on a Tuesday when prices can be found for as low as C$ 935. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around C$ 1,307. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southeast Asia.

What is the cheapest time of day to depart on your flight to Southeast Asia?

According to our data, the cheapest time of day to fly to Southeast Asia is in the evening. momondo users have found flights departing from London to Southeast Asia in the evening for as low as C$ 944. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Southeast Asia are more costly in the afternoon, with an average ticket price of C$ 1,129. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest London to Southeast Asia flight route?

Fly from London Gatwick to Bangkok Suvarnabhumi for the best London - Southeast Asia flight prices

How far in advance should I book a flight to Southeast Asia?

You are more likely to see cheaper flights to Southeast Asia from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around C$ 1,311 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from London for as low as C$ 1,226 on momondo.

What cabin class options are available on London to Southeast Asia flights?

There are 3 cabin classes available to choose from on London to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to Southeast Asia flights?

No. A direct flight is the cheapest option for a flight between London to Southeast Asia.

Cheap London to Southeast Asia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Southeast Asia

Fastest flight time

11h 15m

Direct flights

Mon, Tue, Wed, Thu, Sat and Sun

Airports in Southeast Asia

1 airport
The fastest flight from London to Southeast Asia takes 11h 15m
Direct flights go from London to Southeast Asia on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Southeast Asia: Bangkok Suvarnabhumi (BKK)
Search flight deals

  • When did momondo last update prices for flights from London to Southeast Asia?

    Prices for flights from London to Southeast Asia are refreshed on a daily basis.

  • How many operators does momondo search for flights from London to Southeast Asia?

  • How old do you have to be to fly from London to Southeast Asia?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Southeast Asia.

  • What documentation or ID do you need to fly to Southeast Asia?

    The necessary travel and health documents for your Southeast Asia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London to Southeast Asia?

Best airlines flying from London to Southeast Asia

Compare and see reviews for airlines that fly from London to Southeast Asia with momondo
Airline
Rating
Free Cancellation
Price
Thai AirwaysPriceFrom C$ 752Free CancellationRating
7.8
361 reviews
Search Thai Airways flights
Air ChinaPriceFrom C$ 778Free CancellationRating
7.1
119 reviews
Search Air China flights
EVA AirPriceFrom C$ 1,263Free CancellationRating
8.4
1,268 reviews
Search EVA Air flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Southeast Asia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Southeast Asia for you.

Can I find flights from London to Southeast Asia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Southeast Asia from London with this policy.

How can momondo help me find flights from London to Southeast Asia?

Once all potential London to Southeast Asia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to Southeast Asia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Southeast Asia, momondo offers a useful price alert feature which will track prices for flights to Southeast Asia from London and alert you when they change.

An easier way to manage your Southeast Asia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 29/11
Sat 6/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Southeast Asia

Popular Cities in Southeast Asia

Popular flights according to clicks in the last 7 days on momondo
Flights to Torontofrom C$ 99
Flights to Vancouverfrom C$ 74
Flights to New Delhifrom C$ 954
Flights to Montrealfrom C$ 197
Flights to Calgaryfrom C$ 82
Flights to Parisfrom C$ 589
Flights to Londonfrom C$ 635
Flights to Cancúnfrom C$ 289
Flights to Manilafrom C$ 832
Flights to Tokyofrom C$ 645
Flights to Bangkokfrom C$ 687
Flights to Istanbulfrom C$ 813