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Cheap flights from London to Southeast Asia from $280

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 8/26. 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 pm - 2:15 amLHR-BKK
22h 10m1 stop
Shenzhen Airlines Logo
12:10 pm - 8:00 pmBKK-LHR
37h 50m1 stop
$465Shenzhen Airlines
Find Deal
Mon, Sep 15 - Tue, Oct 14
Shenzhen Airlines Logo
10:05 pm - 11:10 amLHR-BKK
31h 05m1 stop
Shenzhen Airlines Logo
12:10 pm - 8:00 pmBKK-LHR
37h 50m1 stop
$466Shenzhen Airlines
Find Deal
Wed, Sep 17 - Thu, Oct 2
Air China Logo
5:40 pm - 11:55 amLHR-HAN
35h 15m1 stop
Air China Logo
1:20 pm - 5:50 pmHAN-LHR
35h 30m1 stop
$521Air China
Find Deal
Tue, Nov 4 - Tue, Nov 25
China Eastern Logo
10:30 am - 12:20 pmLGW-BKK
18h 50m1 stop
China Eastern Logo
1:55 am - 2:00 pmBKK-LGW
19h 05m1 stop
$560China Eastern
Find Deal
Sun, Nov 30 - Sun, Dec 14
China Eastern Logo
10:30 am - 12:45 amLGW-BKK
31h 15m2 stops
China Eastern Logo
1:55 am - 2:00 pmBKK-LGW
19h 05m1 stop
$561China Eastern
Find Deal
Sat, Nov 22 - Sat, Dec 13
China Southern Logo
10:10 pm - 10:20 amLHR-BKK
30h 10m1 stop
China Southern Logo
3:00 am - 7:00 pmBKK-LHR
22h 00m1 stop
$585China Southern
Find Deal
Wed, Oct 1 - Thu, Oct 16
China Southern Logo
10:10 pm - 12:50 pmLHR-BKK
32h 40m1 stop
China Southern Logo
8:20 am - 7:00 pmBKK-LHR
16h 40m1 stop
$589China Southern
Find Deal
Thu, Sep 25 - Fri, Oct 24
Air China Logo
9:35 pm - 1:25 amLHR-MNL
19h 50m1 stop
Air China Logo
2:55 am - 7:40 pmMNL-LHR
24h 45m1 stop
$591Air China
Find Deal
Thu, Nov 20 - Fri, Jan 23
Singapore Airlines Logo
10:05 pm - 2:45 pmLHR-LGK
33h 40m1 stop
Singapore Airlines Logo
3:30 pm - 7:25 amLGK-LHR
23h 55m1 stop
$1,041Singapore Airlines
Find Deal
Mon, Oct 13 - Mon, Oct 27
Singapore Airlines Logo
11:25 am - 2:15 pmLHR-LGK
19h 50m2 stops
Singapore Airlines Logo
11:15 am - 7:30 pmLGK-LHR
39h 15m2 stops
$2,004Singapore Airlines
Find Deal
Thu, Sep 11 - Sat, Sep 13

Shenzhen Airlines flights from London to Southeast Asia

Our best Shenzhen Airlines deals on London to Southeast Asia flight tickets
Shenzhen Airlines
Sep 15
LHR10:05 pmLondon Heathrow
22h 10m
1 stop
BKK2:15 amBangkok Suvarnabhumi
Oct 14
BKK12:10 pmBangkok Suvarnabhumi
37h 50m
1 stop
LHR8:00 pmLondon Heathrow
$465
Find similar
Shenzhen Airlines
Sep 17
LHR10:05 pmLondon Heathrow
31h 05m
1 stop
BKK11:10 amBangkok Suvarnabhumi
Oct 2
BKK12:10 pmBangkok Suvarnabhumi
37h 50m
1 stop
LHR8:00 pmLondon Heathrow
$466
Find similar
Shenzhen Airlines
Sep 1
LHR10:05 pmLondon Heathrow
31h 05m
1 stop
BKK11:10 amBangkok Suvarnabhumi
Sep 30
BKK7:30 pmBangkok Suvarnabhumi
30h 30m
1 stop
LHR8:00 pmLondon Heathrow
$468
Find similar

China Eastern flights from London to Southeast Asia

Our best China Eastern deals on London to Southeast Asia flight tickets
China Eastern
Nov 30
LGW10:30 amLondon Gatwick
18h 50m
1 stop
BKK12:20 pmBangkok Suvarnabhumi
Dec 14
BKK1:55 amBangkok Suvarnabhumi
19h 05m
1 stop
LGW2:00 pmLondon Gatwick
$560
Find similar
China Eastern
Nov 22
LGW10:30 amLondon Gatwick
31h 15m
2 stops
BKK12:45 amBangkok Suvarnabhumi
Dec 13
BKK1:55 amBangkok Suvarnabhumi
19h 05m
1 stop
LGW2:00 pmLondon Gatwick
$561
Find similar
China Eastern
Nov 30
LGW5:00 pmLondon Gatwick
36h 20m
1 stop
BKK12:20 pmBangkok Suvarnabhumi
Dec 14
BKK1:55 amBangkok Suvarnabhumi
19h 05m
1 stop
LGW2:00 pmLondon Gatwick
$563
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 832,500 searches. Data last updated July 29, 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

Mon 9/15

10:05 pm-2:15 am

1 stop22h 10m

Bangkok Suvarnabhumi

Tue 10/14

12:10 pm-8:00 pm

1 stop37h 50m

$465

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 9/17

10:05 pm-11:10 am

1 stop31h 05m

Bangkok Suvarnabhumi

Thu 10/2

12:10 pm-8:00 pm

1 stop37h 50m

$466

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Tue 11/4

5:40 pm-11:55 am

1 stop35h 15m

Hanoi Noibai

Tue 11/25

1:20 pm-5:50 pm

1 stop35h 30m

$521

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 11/30

10:30 am-12:20 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Sun 12/14

1:55 am-2:00 pm

1 stop19h 05m

$560

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 11/22

10:30 am-12:45 am

2 stops31h 15m

Bangkok Suvarnabhumi

Sat 12/13

1:55 am-2:00 pm

1 stop19h 05m

$561

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 10/1

10:10 pm-10:20 am

1 stop30h 10m

Bangkok Suvarnabhumi

Thu 10/16

3:00 am-7:00 pm

1 stop22h 00m

$585

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 9/25

10:10 pm-12:50 pm

1 stop32h 40m

Bangkok Suvarnabhumi

Fri 10/24

8:20 am-7:00 pm

1 stop16h 40m

$589

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Thu 11/20

9:35 pm-1:25 am

1 stop19h 50m

Manila Ninoy Aquino Intl

Fri 1/23

2:55 am-7:40 pm

1 stop24h 45m

$591

LondonLangkawi

LHR - LGK

LHRLGK

London Heathrow

Mon 10/13

10:05 pm-2:45 pm

1 stop33h 40m

Langkawi

Mon 10/27

3:30 pm-7:25 am

1 stop23h 55m

$1,041

LondonLangkawi

LHR - LGK

LHRLGK

London Heathrow

Thu 9/11

11:25 am-2:15 pm

2 stops19h 50m

Langkawi

Sat 9/13

11:15 am-7:30 pm

2 stops39h 15m

$2,004

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 month of May is, on average, the cheapest month to fly to Southeast Asia from London, with most prices found around $543. If you don’t want to visit Southeast Asia in May, then you should wait until September to fly from London, when ticket prices are also cheap, with an average price of $737.

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 Monday when prices can be found for as low as $996. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,077. 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?

In the afternoon is the cheapest time of day to fly from London to Southeast Asia when you can find flight prices for as low as $798. Flying to Southeast Asia in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $1,058. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $945 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 $872 on momondo.

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

There are 4 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

$280

Fastest flight time

11h 20m

Direct flights

Mon, Tue, Wed, Thu and Sat

Airports in Southeast Asia

7 airports
The best one-way flight to Southeast Asia from London in the past 72 hours is $280. The best round-trip flight deal from London to Southeast Asia found on momondo in the last 72 hours is $465.
The fastest flight from London to Southeast Asia takes 11h 20m
Direct flights go from London to Southeast Asia on Monday, Tuesday, Wednesday, Thursday and Saturday. Airlines offering direct flights are: Vietnam Airlines, A.P.G. and Norse Atlantic UK.
There are 7 airports near Southeast Asia: Phuket City (HKT), Langkawi (LGK), Bangkok Suvarnabhumi (BKK), Kuala Lumpur Intl (KUL), Hanoi Noibai (HAN), Singapore Changi (SIN), Manila Ninoy Aquino Intl (MNL)
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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 for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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
Norse Atlantic UKPriceFrom $370Free CancellationRating
7.2
47 reviews
Search Norse Atlantic UK flights
SAUDIAPriceFrom $407Free CancellationRating
7.4
626 reviews
Search SAUDIA flights
Shenzhen AirlinesPriceFrom $457Free CancellationRating
6.5
14 reviews
Search Shenzhen Airlines flights
Gulf AirPriceFrom $514Free CancellationRating
7.1
203 reviews
Search Gulf Air flights
China EasternPriceFrom $533Free CancellationRating
7.2
158 reviews
Search China Eastern flights
China SouthernPriceFrom $540Free CancellationRating
7.6
104 reviews
Search China Southern flights
Hainan AirlinesPriceFrom $560Free CancellationRating
8.2
43 reviews
Search Hainan Airlines flights
Air IndiaPriceFrom $590Free CancellationRating
5.5
2,927 reviews
Search Air India flights
British AirwaysPriceFrom $620Free CancellationRating
6.6
7,208 reviews
Search British Airways flights
Austrian AirlinesPriceFrom $673Free CancellationRating
7.6
821 reviews
Search Austrian Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southeast Asia from London.

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

Yes. All flights to Southeast Asia from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

Price alerts on flights to Southeast Asia from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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