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Cheap flights from London to Southeast Asia from C$ 544

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 15/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London to Southeast Asia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Shenzhen Airlines Logo
9:10 p.m. - 6:30 p.m.
LHR
-
BKK
38h 20m1 stop
Shenzhen Airlines Logo
12:10 p.m. - 7:10 p.m.
BKK
-
LHR
38h 00m1 stop
C$ 821Shenzhen Airlines
Fri, 9 Jan - Sun, 18 Jan
Norse Atlantic UK Logo
4:00 p.m. - 10:25 a.m.
LGW
-
BKK
11h 25mdirect
Norse Atlantic UK Logo
12:25 p.m. - 6:20 p.m.
BKK
-
LGW
12h 55mdirect
C$ 840Norse Atlantic UK
Wed, 4 Mar - Thu, 26 Mar
Norse Atlantic UK Logo
4:00 p.m. - 10:25 a.m.
LGW
-
BKK
11h 25mdirect
Norse Atlantic UK Logo
12:25 p.m. - 6:20 p.m.
BKK
-
LGW
12h 55mdirect
C$ 841Norse Atlantic UK
Wed, 11 Mar - Thu, 26 Mar
China Eastern Logo
6:40 p.m. - 1:15 a.m.
LGW
-
BKK
24h 35m2 stops
China Eastern Logo
1:35 p.m. - 3:10 p.m.
BKK
-
LGW
31h 35m1 stop
C$ 896China Eastern
Fri, 10 Apr - Sun, 26 Apr
China Eastern Logo
11:35 a.m. - 1:15 a.m.
LGW
-
BKK
31h 40m2 stops
China Eastern Logo
2:10 a.m. - 3:10 p.m.
BKK
-
LGW
19h 00m1 stop
C$ 899China Eastern
Wed, 8 Apr - Sun, 26 Apr
Air India Logo
9:45 p.m. - 8:25 p.m.
LHR
-
BKK
16h 40m1 stop
Air India Logo
10:25 p.m. - 7:00 p.m.
BKK
-
LHR
26h 35m1 stop
C$ 986Air India
Tue, 26 May - Wed, 27 May
SAUDIA Logo
6:50 p.m. - 10:30 p.m.
LHR
-
HKT
20h 40m1 stop
SAUDIA Logo
4:00 p.m. - 7:30 a.m.
HKT
-
LHR
22h 30m1 stop
C$ 1,030SAUDIA
Thu, 15 Jan - Sun, 25 Jan
Air India Logo
9:45 a.m. - 9:35 p.m.
LHR
-
MNL
28h 50m1 stop
Air India Logo
10:40 p.m. - 11:30 a.m.
MNL
-
LHR
19h 50m1 stop
C$ 1,041Air India
Fri, 1 May - Mon, 25 May
SAUDIA Logo
4:15 p.m. - 10:30 p.m.
LHR
-
HKT
23h 15m1 stop
SAUDIA Logo
3:15 p.m. - 7:30 a.m.
HKT
-
LHR
23h 15m1 stop
C$ 1,071SAUDIA
Sun, 4 Jan - Fri, 23 Jan
Vietnam Airlines Logo
7:10 p.m. - 2:40 a.m.
LHR
-
MNL
24h 30m1 stop
Vietnam Airlines Logo
5:20 a.m. - 5:05 p.m.
MNL
-
LHR
18h 45m1 stop
C$ 1,082Vietnam Airlines
Thu, 30 Apr - Mon, 25 May

Turkish Airlines flights from London to Southeast Asia

Our best Turkish Airlines deals on London to Southeast Asia flight tickets
Turkish Airlines
28 Dec
LHR5:45 p.m.London Heathrow
14h 20m
1 stop
BKK3:05 p.m.Bangkok Suvarnabhumi
21 Feb
BKK10:10 a.m.Bangkok Suvarnabhumi
17h 55m
1 stop
LHR9:05 p.m.London Heathrow
C$ 1,334
Find similar
Turkish Airlines
23 Dec
LGW6:25 a.m.London Gatwick
19h 15m
1 stop
BKK8:40 a.m.Bangkok Suvarnabhumi
21 Feb
BKK11:15 p.m.Bangkok Suvarnabhumi
17h 05m
1 stop
LGW9:20 a.m.London Gatwick
C$ 1,561
Find similar

Qatar Airways flights from London to Southeast Asia

Our best Qatar Airways deals on London to Southeast Asia flight tickets
Qatar Airways
30 Apr
LGW9:00 a.m.London Gatwick
21h 55m
1 stop
BKK12:55 p.m.Bangkok Suvarnabhumi
19 May
BKK7:40 p.m.Bangkok Suvarnabhumi
23h 45m
1 stop
LGW1:25 p.m.London Gatwick
C$ 1,064
Find similar
Qatar Airways
6 Apr
LGW2:55 p.m.London Gatwick
22h 10m
1 stop
BKK7:05 p.m.Bangkok Suvarnabhumi
27 Apr
BKK1:45 a.m.Bangkok Suvarnabhumi
34h 55m
1 stop
LGW6:40 a.m.London Gatwick
C$ 1,067
Find similar
Qatar Airways
12 Feb
LHR8:35 a.m.London Heathrow
15h 05m
1 stop
HKT6:40 a.m.Phuket City
17 Feb
HKT8:20 a.m.Phuket City
20h 35m
1 stop
LHR9:55 p.m.London Heathrow
C$ 1,091
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 15 December 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

Fri 9/1

9:10 p.m.-6:30 p.m.

1 stop38h 20m

Bangkok Suvarnabhumi

Sun 18/1

12:10 p.m.-7:10 p.m.

1 stop38h 00m

C$ 821

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 4/3

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

Nonstop11h 25m

Bangkok Suvarnabhumi

Thu 26/3

12:25 p.m.-6:20 p.m.

Nonstop12h 55m

C$ 840

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 11/3

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

Nonstop11h 25m

Bangkok Suvarnabhumi

Thu 26/3

12:25 p.m.-6:20 p.m.

Nonstop12h 55m

C$ 841

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 10/4

6:40 p.m.-1:15 a.m.

2 stops24h 35m

Bangkok Suvarnabhumi

Sun 26/4

1:35 p.m.-3:10 p.m.

1 stop31h 35m

C$ 896

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 8/4

11:35 a.m.-1:15 a.m.

2 stops31h 40m

Bangkok Suvarnabhumi

Sun 26/4

2:10 a.m.-3:10 p.m.

1 stop19h 00m

C$ 899

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 26/5

9:45 p.m.-8:25 p.m.

1 stop16h 40m

Bangkok Suvarnabhumi

Wed 27/5

10:25 p.m.-7:00 p.m.

1 stop26h 35m

C$ 986

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 15/1

6:50 p.m.-10:30 p.m.

1 stop20h 40m

Phuket City

Sun 25/1

4:00 p.m.-7:30 a.m.

1 stop22h 30m

C$ 1,030

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Fri 1/5

9:45 a.m.-9:35 p.m.

1 stop28h 50m

Manila Ninoy Aquino Intl

Mon 25/5

10:40 p.m.-11:30 a.m.

1 stop19h 50m

C$ 1,041

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 4/1

4:15 p.m.-10:30 p.m.

1 stop23h 15m

Phuket City

Fri 23/1

3:15 p.m.-7:30 a.m.

1 stop23h 15m

C$ 1,071

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Thu 30/4

7:10 p.m.-2:40 a.m.

1 stop24h 30m

Manila Ninoy Aquino Intl

Mon 25/5

5:20 a.m.-5:05 p.m.

1 stop18h 45m

C$ 1,082

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 May. Flight prices, which tend to average around C$ 991, 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$ 1,052.

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$ 922. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around C$ 1,289. 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$ 931. 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$ 1,113. 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 Singapore Changi 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$ 1,299 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$ 1,220 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 25m

Direct flights

Mon, Tue, Wed, Thu, Sat and Sun

Airports in Southeast Asia

295 airports
The fastest flight from London to Southeast Asia takes 11h 25m
Direct flights go from London to Southeast Asia on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
There are 295 airports in Southeast Asia. From London there are direct flights to 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$ 741Free CancellationRating
7.8
366 reviews
Search Thai Airways flights
Air ChinaPriceFrom C$ 767Free CancellationRating
7.2
127 reviews
Search Air China flights
EVA AirPriceFrom C$ 1,244Free CancellationRating
8.5
1,297 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
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