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Cheap flights from London Heathrow Airport to Southeast Asia from €360

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 Heathrow Airport to Southeast Asia departing on 3/11. 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
0 bags

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Find the cheapest flights from London Heathrow Airport to Southeast Asia

Cheap return flights

Air China Logo
20:25 - 01:10LHR-SGN
21h 45m1 stop
Air China Logo
05:00 - 17:50SGN-LHR
19h 50m1 stop
€483Air China
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Mon, 27 Oct - Mon, 10 Nov
Air China Logo
20:25 - 01:10LHR-SGN
21h 45m1 stop
Air China Logo
05:00 - 17:50SGN-LHR
19h 50m1 stop
€486Air China
Find Deal
Mon, 27 Oct - Mon, 10 Nov
Shenzhen Airlines Logo
21:10 - 11:10LHR-BKK
31h 00m1 stop
Shenzhen Airlines Logo
03:15 - 19:10BKK-LHR
22h 55m1 stop
€511Shenzhen Airlines
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Sun, 2 Nov - Sat, 29 Nov
Shenzhen Airlines Logo
21:10 - 11:10LHR-BKK
31h 00m1 stop
Shenzhen Airlines Logo
12:10 - 19:10BKK-LHR
38h 00m1 stop
€512Shenzhen Airlines
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Fri, 7 Nov - Fri, 28 Nov
Shenzhen Airlines Logo
21:10 - 02:15LHR-BKK
22h 05m1 stop
Shenzhen Airlines Logo
03:15 - 19:10BKK-LHR
22h 55m1 stop
€512Shenzhen Airlines
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Sat, 29 Nov - Fri, 19 Dec
Air India Logo
13:30 - 19:35LHR-BKK
23h 05m1 stop
Air India Logo
20:50 - 11:05BKK-LHR
21h 15m1 stop
€534Air India
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Sun, 2 Nov - Sun, 30 Nov
Multiple Airlines Logo
17:40 - 01:20LHR-MNL
23h 40m2 stops
Multiple Airlines Logo
02:05 - 15:55MNL-LHR
21h 50m2 stops
€535Multiple Airlines
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Fri, 31 Oct - Thu, 6 Nov
Multiple Airlines Logo
19:25 - 15:30LHR-BKK
13h 05m1 stop
Multiple Airlines Logo
23:30 - 08:05BKK-LHR
15h 35m1 stop
€544Multiple Airlines
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Tue, 3 Feb - Tue, 17 Feb
China Eastern Logo
21:00 - 22:25LHR-BKK
18h 25m1 stop
China Eastern Logo
05:05 - 17:30BKK-LHR
19h 25m1 stop
€557China Eastern
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Sun, 9 Nov - Mon, 24 Nov
Air India Logo
22:00 - 08:10LHR-DPS
26h 10m1 stop
Air India Logo
10:35 - 06:35DPS-LHR
28h 00m1 stop
€822Air India
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Sun, 22 Feb - Thu, 26 Feb

Etihad Airways flights from London Heathrow Airport to Southeast Asia

Our best Etihad Airways deals on London Heathrow Airport to Southeast Asia flight tickets
Etihad Airways
9 Nov
LHR19:20London Heathrow
21h 00m
1 stop
BKK23:20Bangkok Suvarnabhumi
24 Nov
BKK09:25Bangkok Suvarnabhumi
36h 05m
1 stop
LHR14:30London Heathrow
€580
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Etihad Airways
29 Sept
LHR14:45London Heathrow
27h 10m
1 stop
BKK23:55Bangkok Suvarnabhumi
13 Nov
BKK02:55Bangkok Suvarnabhumi
18h 35m
1 stop
LHR14:30London Heathrow
€582
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Etihad Airways
29 Sept
LHR14:45London Heathrow
27h 10m
1 stop
BKK23:55Bangkok Suvarnabhumi
21 Oct
BKK20:55Bangkok Suvarnabhumi
24h 20m
1 stop
LHR15:15London Heathrow
€582
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Shenzhen Airlines flights from London Heathrow Airport to Southeast Asia

Our best Shenzhen Airlines deals on London Heathrow Airport to Southeast Asia flight tickets
Shenzhen Airlines
2 Nov
LHR21:10London Heathrow
31h 00m
1 stop
BKK11:10Bangkok Suvarnabhumi
29 Nov
BKK03:15Bangkok Suvarnabhumi
22h 55m
1 stop
LHR19:10London Heathrow
€511
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Shenzhen Airlines
7 Nov
LHR21:10London Heathrow
31h 00m
1 stop
BKK11:10Bangkok Suvarnabhumi
28 Nov
BKK12:10Bangkok Suvarnabhumi
38h 00m
1 stop
LHR19:10London Heathrow
€512
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Shenzhen Airlines
29 Nov
LHR21:10London Heathrow
22h 05m
1 stop
BKK02:15Bangkok Suvarnabhumi
19 Dec
BKK03:15Bangkok Suvarnabhumi
22h 55m
1 stop
LHR19:10London Heathrow
€512
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momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 13,528 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Mon 27/10

20:25-01:10

1 stop21h 45m

Ho Chi Minh City

Mon 10/11

05:00-17:50

1 stop19h 50m

€483

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Mon 27/10

20:25-01:10

1 stop21h 45m

Ho Chi Minh City

Mon 10/11

05:00-17:50

1 stop19h 50m

€486

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 2/11

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Sat 29/11

03:15-19:10

1 stop22h 55m

€511

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 7/11

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Fri 28/11

12:10-19:10

1 stop38h 00m

€512

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 29/11

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Fri 19/12

03:15-19:10

1 stop22h 55m

€512

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 2/11

13:30-19:35

1 stop23h 05m

Bangkok Suvarnabhumi

Sun 30/11

20:50-11:05

1 stop21h 15m

€534

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Fri 31/10

17:40-01:20

2 stops23h 40m

Manila Ninoy Aquino Intl

Thu 6/11

02:05-15:55

2 stops21h 50m

€535

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 3/2

19:25-15:30

1 stop13h 05m

Bangkok Suvarnabhumi

Tue 17/2

23:30-08:05

1 stop15h 35m

€544

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 9/11

21:00-22:25

1 stop18h 25m

Bangkok Suvarnabhumi

Mon 24/11

05:05-17:30

1 stop19h 25m

€557

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Sun 22/2

22:00-08:10

1 stop26h 10m

Denpasar Bali Ngurah Rai

Thu 26/2

10:35-06:35

1 stop28h 00m

€822

Flights are sorted by cheapest return 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 Heathrow Airport 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 Heathrow Airport is in May. Flight prices, which tend to average around €697, are often lower during this time because this is during the off-season. If you’re not able to fly to Southeast Asia in May, then June is your next best option. Flight prices from London Heathrow Airport to Southeast Asia during June average around €702.

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

The cheapest day to depart from London Heathrow Airport to Southeast Asia is on a Wednesday. Travellers who choose to depart for Southeast Asia on a Wednesday will often find tickets for as low as €775. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around €1,142. 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?

Our most recent data shows that the best time of day to fly to Southeast Asia is in the afternoon. Flights from London Heathrow Airport to Southeast Asia during this time can be as low as €671. Flights to Southeast Asia are more costly in the evening, with an average ticket price of €905. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest London Heathrow to Southeast Asia flight route?

Fly from London Heathrow to Bangkok Suvarnabhumi for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around €798 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from London Heathrow Airport for as low as €734 on momondo.

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

There are 2 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Southeast Asia flights?

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

Cheap London Heathrow Airport to Southeast Asia flight deals and tips

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

Fastest flight time

11h 25m

Direct flights

Every day

Airports in Southeast Asia

1 airport
The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 25m
Direct flights go from London Heathrow Airport to Southeast Asia every day.
There is 1 airport near Southeast Asia: Bangkok Suvarnabhumi (BKK)
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  • When did momondo last update prices for flights from London Heathrow Airport to Southeast Asia?

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport 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 licence 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 Heathrow Airport to Southeast Asia?

Best airlines flying from London Heathrow Airport to Southeast Asia

Compare and see reviews for airlines that fly from London Heathrow Airport to Southeast Asia with momondo
Airline
Rating
Free Cancellation
Price
Air ChinaPriceFrom €437Free CancellationRating
7.3
101 reviews
Search Air China flights

Why use momondo?

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

Finding the right flight to Southeast Asia from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Southeast Asia quick and easy, saving you time and money.

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?

momondo helps you find the best flight between London and Southeast Asia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for London to Southeast Asia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Southeast Asia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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