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Cheap flights from London to Southeast Asia from C$ 454

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 28/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London to Southeast Asia

Cheap round-trip flights

Shenzhen Airlines Logo
10:05 p.m. - 2:15 a.m.LHR-BKK
22h 10m1 stop
Shenzhen Airlines Logo
3:15 a.m. - 7:50 p.m.BKK-LHR
22h 35m1 stop
C$ 662Shenzhen Airlines
Find Deal
Wed, 17 Sep - Sun, 19 Oct
Shenzhen Airlines Logo
10:05 p.m. - 11:10 a.m.LHR-BKK
31h 05m1 stop
Shenzhen Airlines Logo
7:30 p.m. - 7:10 p.m.BKK-LHR
30h 40m1 stop
C$ 665Shenzhen Airlines
Find Deal
Sat, 13 Sep - Sat, 6 Dec
Norse Atlantic UK Logo
3:55 p.m. - 10:25 a.m.LGW-BKK
11h 30mdirect
Norse Atlantic UK Logo
12:30 p.m. - 6:30 p.m.BKK-LGW
13h 00mdirect
C$ 782Norse Atlantic UK
Find Deal
Fri, 5 Dec - Mon, 8 Dec
Logo
9:15 a.m. - 10:15 a.m.LGW-BKK
18h 00m1 stop
Logo
12:40 p.m. - 4:55 p.m.BKK-LGW
35h 15m1 stop
C$ 788
Find Deal
Thu, 27 Nov - Mon, 8 Dec
China Eastern Logo
5:00 p.m. - 12:55 a.m.LGW-BKK
24h 55m1 stop
China Eastern Logo
1:35 p.m. - 2:00 p.m.BKK-LGW
31h 25m1 stop
C$ 800China Eastern
Find Deal
Mon, 10 Nov - Sat, 15 Nov
Logo
5:40 p.m. - 10:15 a.m.LGW-BKK
33h 35m1 stop
Logo
12:20 p.m. - 8:35 a.m.BKK-LGW
27h 15m1 stop
C$ 801
Find Deal
Wed, 5 Nov - Fri, 21 Nov
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$ 803Norse Atlantic UK
Find Deal
Wed, 5 Nov - Wed, 17 Dec
China Eastern Logo
10:30 a.m. - 12:55 a.m.LGW-BKK
31h 25m1 stop
China Eastern Logo
3:55 p.m. - 2:00 p.m.BKK-LGW
53h 05m3 stops
C$ 808China Eastern
Find Deal
Mon, 10 Nov - Sat, 15 Nov
Air China Logo
9:35 p.m. - 1:25 a.m.LHR-MNL
19h 50m1 stop
Air China Logo
2:55 a.m. - 7:40 p.m.MNL-LHR
24h 45m1 stop
C$ 841Air China
Find Deal
Thu, 27 Nov - Wed, 28 Jan
Air China Logo
5:40 p.m. - 12:05 a.m.LHR-MNL
22h 25m1 stop
Air China Logo
2:55 a.m. - 7:40 p.m.MNL-LHR
24h 45m1 stop
C$ 852Air China
Find Deal
Mon, 24 Nov - Wed, 28 Jan

China Eastern flights from London to Southeast Asia

Our best China Eastern deals on London to Southeast Asia flight tickets
China Eastern
10 Nov
LGW5:00 p.m.London Gatwick
24h 55m
1 stop
BKK12:55 a.m.Bangkok Suvarnabhumi
15 Nov
BKK1:35 p.m.Bangkok Suvarnabhumi
31h 25m
1 stop
LGW2:00 p.m.London Gatwick
C$ 800
Find similar
China Eastern
10 Nov
LGW10:30 a.m.London Gatwick
31h 25m
1 stop
BKK12:55 a.m.Bangkok Suvarnabhumi
15 Nov
BKK3:55 p.m.Bangkok Suvarnabhumi
53h 05m
3 stops
LGW2:00 p.m.London Gatwick
C$ 808
Find similar
China Eastern
10 Nov
LGW10:30 a.m.London Gatwick
18h 50m
1 stop
BKK12:20 p.m.Bangkok Suvarnabhumi
15 Nov
BKK7:50 a.m.Bangkok Suvarnabhumi
37h 10m
3 stops
LGW2:00 p.m.London Gatwick
C$ 810
Find similar

Shenzhen Airlines flights from London to Southeast Asia

Our best Shenzhen Airlines deals on London to Southeast Asia flight tickets
Shenzhen Airlines
17 Sep
LHR10:05 p.m.London Heathrow
22h 10m
1 stop
BKK2:15 a.m.Bangkok Suvarnabhumi
19 Oct
BKK3:15 a.m.Bangkok Suvarnabhumi
22h 35m
1 stop
LHR7:50 p.m.London Heathrow
C$ 662
Find similar
Shenzhen Airlines
13 Sep
LHR10:05 p.m.London Heathrow
31h 05m
1 stop
BKK11:10 a.m.Bangkok Suvarnabhumi
6 Dec
BKK7:30 p.m.Bangkok Suvarnabhumi
30h 40m
1 stop
LHR7:10 p.m.London Heathrow
C$ 665
Find similar
Shenzhen Airlines
17 Sep
LHR10:05 p.m.London Heathrow
22h 10m
1 stop
BKK2:15 a.m.Bangkok Suvarnabhumi
16 Oct
BKK3:15 a.m.Bangkok Suvarnabhumi
22h 45m
1 stop
LHR8:00 p.m.London Heathrow
C$ 666
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 July 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

LHR - BKK

LHRBKK

London Heathrow

Wed 17/9

10:05 p.m.-2:15 a.m.

1 stop22h 10m

Bangkok Suvarnabhumi

Sun 19/10

3:15 a.m.-7:50 p.m.

1 stop22h 35m

C$ 662

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 13/9

10:05 p.m.-11:10 a.m.

1 stop31h 05m

Bangkok Suvarnabhumi

Sat 6/12

7:30 p.m.-7:10 p.m.

1 stop30h 40m

C$ 665

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 5/12

3:55 p.m.-10:25 a.m.

Nonstop11h 30m

Bangkok Suvarnabhumi

Mon 8/12

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

Nonstop13h 00m

C$ 782

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 27/11

9:15 a.m.-10:15 a.m.

1 stop18h 00m

Bangkok Suvarnabhumi

Mon 8/12

12:40 p.m.-4:55 p.m.

1 stop35h 15m

C$ 788

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 10/11

5:00 p.m.-12:55 a.m.

1 stop24h 55m

Bangkok Suvarnabhumi

Sat 15/11

1:35 p.m.-2:00 p.m.

1 stop31h 25m

C$ 800

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 5/11

5:40 p.m.-10:15 a.m.

1 stop33h 35m

Bangkok Suvarnabhumi

Fri 21/11

12:20 p.m.-8:35 a.m.

1 stop27h 15m

C$ 801

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 5/11

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

Nonstop11h 25m

Bangkok Suvarnabhumi

Wed 17/12

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

Nonstop13h 00m

C$ 803

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 10/11

10:30 a.m.-12:55 a.m.

1 stop31h 25m

Bangkok Suvarnabhumi

Sat 15/11

3:55 p.m.-2:00 p.m.

3 stops53h 05m

C$ 808

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Thu 27/11

9:35 p.m.-1:25 a.m.

1 stop19h 50m

Manila Ninoy Aquino Intl

Wed 28/1

2:55 a.m.-7:40 p.m.

1 stop24h 45m

C$ 841

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Mon 24/11

5:40 p.m.-12:05 a.m.

1 stop22h 25m

Manila Ninoy Aquino Intl

Wed 28/1

2:55 a.m.-7:40 p.m.

1 stop24h 45m

C$ 852

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 November. Flight prices, which tend to average around C$ 992, are often lower during this time because this is during the off-season. If you don’t want to visit Southeast Asia in November, then you should wait until May to fly from London, when ticket prices are also cheap, with an average price of C$ 1,019.

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$ 924. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around C$ 1,292. 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$ 932. 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$ 1,115. 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 Heathrow 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$ 1,285 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$ 1,186 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

Best price found

C$ 454

Fastest flight time

11h 25m

Direct flights

Every day

Airports in Southeast Asia

4 airports
The best one-way flight to Southeast Asia from London in the past 72 hours is C$ 454. The best round-trip flight deal from London to Southeast Asia found on momondo in the last 72 hours is C$ 662.
The fastest flight from London to Southeast Asia takes 11h 25m
Direct flights go from London to Southeast Asia every day.
There are 4 airports near Southeast Asia: Phuket City (HKT), Bangkok Suvarnabhumi (BKK), Manila Ninoy Aquino Intl (MNL), Phnom Penh Pochentong (PNH)
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  • 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$ 742Free CancellationRating
7.8
340 reviews
Search Thai Airways flights
Air ChinaPriceFrom C$ 769Free CancellationRating
7.3
93 reviews
Search Air China flights
EVA AirPriceFrom C$ 1,246Free CancellationRating
8.4
1,222 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.
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