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Cheap flights from London Heathrow Airport to Southeast Asia from €303

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 16/2. 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 Heathrow Airport to Southeast Asia

Cheap return flights

Enter your travel dates to find the best prices.
China Eastern Logo
21:00 - 00:55
LHR
-
BKK
20h 55m
1 stop
China Eastern Logo
21:55 - 18:40
BKK
-
LHR
26h 45m
1 stop
€472China Eastern
Wed, 4 Mar - Fri, 3 Apr
China Eastern Logo
21:00 - 22:45
LHR
-
HKT
18h 45m
1 stop
China Eastern Logo
23:05 - 18:40
HKT
-
LHR
25h 35m
1 stop
€473China Eastern
Sat, 14 Mar - Sun, 29 Mar
China Eastern Logo
21:00 - 04:45
LHR
-
BKK
24h 45m
1 stop
China Eastern Logo
21:55 - 18:40
BKK
-
LHR
26h 45m
1 stop
€473China Eastern
Tue, 17 Feb - Tue, 31 Mar
China Eastern Logo
21:00 - 00:55
LHR
-
BKK
20h 55m
1 stop
China Eastern Logo
21:55 - 18:40
BKK
-
LHR
26h 45m
1 stop
€475China Eastern
Thu, 12 Mar - Tue, 31 Mar
Air China Logo
20:25 - 00:10
LHR
-
BKK
20h 45m
1 stop
Air China Logo
01:30 - 15:55
BKK
-
LHR
21h 25m
1 stop
€480Air China
Tue, 10 Mar - Tue, 24 Mar
Hainan Airlines Logo
19:45 - 10:05
LHR
-
BKK
31h 20m
1 stop
Hainan Airlines Logo
11:10 - 17:35
BKK
-
LHR
37h 25m
2 stops
€484Hainan Airlines
Wed, 4 Feb - Thu, 12 Mar
Shenzhen Airlines Logo
21:10 - 01:40
LHR
-
MNL
20h 30m
1 stop
Shenzhen Airlines Logo
02:55 - 19:10
MNL
-
LHR
24h 15m
1 stop
€558Shenzhen Airlines
Fri, 6 Mar - Thu, 26 Mar
Shenzhen Airlines Logo
22:05 - 01:40
LHR
-
MNL
20h 35m
1 stop
Shenzhen Airlines Logo
02:55 - 20:00
MNL
-
LHR
24h 05m
1 stop
€567Shenzhen Airlines
Fri, 10 Apr - Thu, 30 Apr
Air India Logo
14:00 - 08:30
LHR
-
DPS
35h 30m
1 stop
Air India Logo
14:35 - 11:30
DPS
-
LHR
27h 55m
1 stop
€570Air India
Thu, 30 Apr - Mon, 11 May
Air India Logo
09:45 - 08:30
LHR
-
DPS
39h 45m
1 stop
Air India Logo
10:00 - 11:30
DPS
-
LHR
32h 30m
1 stop
€573Air India
Thu, 30 Apr - Mon, 11 May

China Eastern flights from London Heathrow Airport to Southeast Asia

Our best China Eastern deals on London Heathrow Airport to Southeast Asia flight tickets
China Eastern
26 Jan
LHR21:00London Heathrow
18h 25m
1 stop
BKK22:25Bangkok Suvarnabhumi
4 Feb
BKK05:45Bangkok Suvarnabhumi
18h 45m
1 stop
LHR17:30London Heathrow
€471
China Eastern
4 Mar
LHR21:00London Heathrow
20h 55m
1 stop
BKK00:55Bangkok Suvarnabhumi
3 Apr
BKK21:55Bangkok Suvarnabhumi
26h 45m
1 stop
LHR18:40London Heathrow
€472
China Eastern
17 Feb
LHR21:00London Heathrow
24h 45m
1 stop
BKK04:45Bangkok Suvarnabhumi
31 Mar
BKK21:55Bangkok Suvarnabhumi
26h 45m
1 stop
LHR18:40London Heathrow
€473

Air India flights from London Heathrow Airport to Southeast Asia

Our best Air India deals on London Heathrow Airport to Southeast Asia flight tickets
Air India
14 Apr
LHR21:45London Heathrow
27h 35m
1 stop
HKT07:20Phuket City
28 Apr
HKT08:20Phuket City
16h 40m
1 stop
LHR19:00London Heathrow
€515
Air India
24 Feb
LHR13:00London Heathrow
20h 55m
1 stop
BKK16:55Bangkok Suvarnabhumi
24 Mar
BKK14:45Bangkok Suvarnabhumi
27h 20m
1 stop
LHR11:05London Heathrow
€516
Air India
14 Apr
LHR20:35London Heathrow
28h 45m
1 stop
HKT07:20Phuket City
28 Apr
HKT08:20Phuket City
16h 40m
1 stop
LHR19:00London Heathrow
€518

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 25 January 2026.
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

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 4/3

21:00-00:55

1 stop20h 55m

Bangkok Suvarnabhumi

Fri 3/4

21:55-18:40

1 stop26h 45m

€472

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sat 14/3

21:00-22:45

1 stop18h 45m

Phuket City

Sun 29/3

23:05-18:40

1 stop25h 35m

€473

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 17/2

21:00-04:45

1 stop24h 45m

Bangkok Suvarnabhumi

Tue 31/3

21:55-18:40

1 stop26h 45m

€473

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 12/3

21:00-00:55

1 stop20h 55m

Bangkok Suvarnabhumi

Tue 31/3

21:55-18:40

1 stop26h 45m

€475

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 10/3

20:25-00:10

1 stop20h 45m

Bangkok Suvarnabhumi

Tue 24/3

01:30-15:55

1 stop21h 25m

€480

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 4/2

19:45-10:05

1 stop31h 20m

Bangkok Suvarnabhumi

Thu 12/3

11:10-17:35

2 stops37h 25m

€484

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Fri 6/3

21:10-01:40

1 stop20h 30m

Manila Ninoy Aquino Intl

Thu 26/3

02:55-19:10

1 stop24h 15m

€558

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Fri 10/4

22:05-01:40

1 stop20h 35m

Manila Ninoy Aquino Intl

Thu 30/4

02:55-20:00

1 stop24h 05m

€567

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Thu 30/4

14:00-08:30

1 stop35h 30m

Denpasar Bali Ngurah Rai

Mon 11/5

14:35-11:30

1 stop27h 55m

€570

LondonDenpasar

LHR - DPS

LHRDPS

London Heathrow

Thu 30/4

09:45-08:30

1 stop39h 45m

Denpasar Bali Ngurah Rai

Mon 11/5

10:00-11:30

1 stop32h 30m

€573

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 September. Flight prices, which tend to average around €689, are often lower during this time because this is during the off-season. If you’re not able to fly to Southeast Asia in September, then May is your next best option. Flight prices from London Heathrow Airport to Southeast Asia during May average around €693.

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 €779. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around €1,127. 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 evening. Flights from London Heathrow Airport to Southeast Asia during this time can be as low as €823. Flights to Southeast Asia are more costly in the morning, with an average ticket price of €825. Departure times in the morning 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 €792 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 €740 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 40m

Direct flights

Every day

Airports in Southeast Asia

295 airports
The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 40m
Direct flights go from London Heathrow Airport to Southeast Asia every day.
There are 295 airports in Southeast Asia. From London Heathrow Airport there are direct flights to Bangkok Suvarnabhumi (BKK).
Search flight deals

  • 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 €438Free CancellationRating
7.2
138 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

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