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Cheap flights from London Heathrow Airport to Southeast Asia from ₹ 36,984

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 15/2. 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.
Multiple Airlines Logo
18:40 - 17:05
LHR
-
SIN
15h 25m1 stop
Multiple Airlines Logo
23:40 - 08:40
SIN
-
LHR
16h 00m1 stop
₹ 56,781Multiple Airlines
Tue, 5 May - Wed, 20 May
Lufthansa Logo
17:50 - 16:40
LHR
-
SIN
15h 50m1 stop
Lufthansa Logo
23:40 - 08:40
SIN
-
LHR
16h 00m1 stop
₹ 56,961Lufthansa
Sun, 19 Apr - Sat, 9 May
Lufthansa Logo
17:50 - 17:25
LHR
-
SIN
15h 35m1 stop
Lufthansa Logo
23:55 - 08:45
SIN
-
LHR
16h 50m1 stop
₹ 57,231Lufthansa
Tue, 17 Mar - Wed, 25 Mar
SWISS Logo
14:25 - 18:00
LHR
-
SIN
19h 35m2 stops
SWISS Logo
00:05 - 11:15
SIN
-
LHR
19h 10m1 stop
₹ 58,131SWISS
Tue, 10 Mar - Mon, 23 Mar
SWISS Logo
14:25 - 18:00
LHR
-
SIN
19h 35m2 stops
SWISS Logo
00:05 - 11:15
SIN
-
LHR
19h 10m1 stop
₹ 58,401SWISS
Tue, 10 Mar - Mon, 23 Mar
Gulf Air Logo
09:30 - 12:30
LHR
-
SIN
19h 00m1 stop
Gulf Air Logo
20:00 - 14:45
SIN
-
LHR
26h 45m1 stop
₹ 58,491Gulf Air
Tue, 3 Feb - Tue, 24 Feb
Gulf Air Logo
09:30 - 12:30
LHR
-
SIN
19h 00m1 stop
Gulf Air Logo
20:00 - 06:35
SIN
-
LHR
18h 35m1 stop
₹ 58,851Gulf Air
Tue, 3 Feb - Mon, 9 Feb
Gulf Air Logo
09:30 - 12:30
LHR
-
SIN
19h 00m1 stop
Gulf Air Logo
20:00 - 06:35
SIN
-
LHR
18h 35m1 stop
₹ 58,941Gulf Air
Thu, 22 Jan - Mon, 26 Jan
Air India Logo
21:05 - 09:10
LHR
-
IXZ
30h 35m1 stop
Air India Logo
11:30 - 11:30
IXZ
-
LHR
29h 30m1 stop
₹ 60,830Air India
Sun, 18 Jan - Sun, 25 Jan
Air India Logo
21:05 - 09:10
LHR
-
IXZ
30h 35m2 stops
Air India Logo
10:05 - 11:30
IXZ
-
LHR
30h 55m1 stop
₹ 64,250Air India
Sun, 18 Jan - Sun, 25 Jan

SWISS flights from London Heathrow Airport to Southeast Asia

Our best SWISS deals on London Heathrow Airport to Southeast Asia flight tickets
SWISS
10 Mar
LHR14:25London Heathrow
19h 35m
2 stops
SIN18:00Singapore Changi
23 Mar
SIN00:05Singapore Changi
19h 10m
1 stop
LHR11:15London Heathrow
₹ 58,131
Find similar
SWISS
10 Mar
LHR14:25London Heathrow
19h 35m
2 stops
SIN18:00Singapore Changi
23 Mar
SIN00:05Singapore Changi
19h 10m
1 stop
LHR11:15London Heathrow
₹ 58,401
Find similar
SWISS
17 Mar
LHR14:25London Heathrow
19h 35m
2 stops
SIN18:00Singapore Changi
23 Mar
SIN00:05Singapore Changi
16h 00m
1 stop
LHR08:05London Heathrow
₹ 58,581
Find similar

Finnair flights from London Heathrow Airport to Southeast Asia

Our best Finnair deals on London Heathrow Airport to Southeast Asia flight tickets
Finnair
23 Apr
LHR10:20London Heathrow
25h 10m
1 stop
SIN18:30Singapore Changi
28 May
SIN21:35Singapore Changi
26h 30m
1 stop
LHR17:05London Heathrow
₹ 64,880
Find similar
Finnair
9 Dec
LHR07:30London Heathrow
27h 10m
1 stop
SIN18:40Singapore Changi
16 Dec
SIN22:05Singapore Changi
26h 55m
1 stop
LHR17:00London Heathrow
₹ 74,058
Find similar
Finnair
9 Dec
LHR07:30London Heathrow
27h 10m
1 stop
SIN18:40Singapore Changi
29 Dec
SIN22:05Singapore Changi
30h 35m
1 stop
LHR20:40London Heathrow
₹ 76,308
Find similar

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 59,053 searches. Data last updated 5 December 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

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 5/5

18:40-17:05

1 stop15h 25m

Singapore Changi

Wed 20/5

23:40-08:40

1 stop16h 00m

₹ 56,781

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 19/4

17:50-16:40

1 stop15h 50m

Singapore Changi

Sat 9/5

23:40-08:40

1 stop16h 00m

₹ 56,961

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 17/3

17:50-17:25

1 stop15h 35m

Singapore Changi

Wed 25/3

23:55-08:45

1 stop16h 50m

₹ 57,231

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 10/3

14:25-18:00

2 stops19h 35m

Singapore Changi

Mon 23/3

00:05-11:15

1 stop19h 10m

₹ 58,131

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 10/3

14:25-18:00

2 stops19h 35m

Singapore Changi

Mon 23/3

00:05-11:15

1 stop19h 10m

₹ 58,401

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 3/2

09:30-12:30

1 stop19h 00m

Singapore Changi

Tue 24/2

20:00-14:45

1 stop26h 45m

₹ 58,491

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 3/2

09:30-12:30

1 stop19h 00m

Singapore Changi

Mon 9/2

20:00-06:35

1 stop18h 35m

₹ 58,851

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 22/1

09:30-12:30

1 stop19h 00m

Singapore Changi

Mon 26/1

20:00-06:35

1 stop18h 35m

₹ 58,941

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Sun 18/1

21:05-09:10

1 stop30h 35m

Port Blair

Sun 25/1

11:30-11:30

1 stop29h 30m

₹ 60,830

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Sun 18/1

21:05-09:10

2 stops30h 35m

Port Blair

Sun 25/1

10:05-11:30

1 stop30h 55m

₹ 64,250

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?

In general, September is the cheapest month to fly from London Heathrow Airport to Southeast Asia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around ₹ 73,608. If you aren’t able to travel during the month of September, then book flights to Southeast Asia from London Heathrow Airport during May instead. Flights to Southeast Asia in May, while not as cheap as those in September, still average around ₹ 74,148.

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 Thursday. Travellers who choose to depart for Southeast Asia on a Thursday will often find tickets for as low as ₹ 87,036. The most expensive day to fly to Southeast Asia is Wednesday, with ticket prices averaging around ₹ 126,904.

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 afternoon. momondo users have found flights departing from London Heathrow Airport to Southeast Asia in the afternoon for as low as ₹ 71,583. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are ₹ 116,601 on average. Flights to Southeast Asia from London Heathrow Airport in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Fly from London Heathrow to Singapore Changi 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 ₹ 84,751 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 ₹ 78,198 on momondo.

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

There are 3 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

13h 10m

Direct flights

Every day

Airports in Southeast Asia

1 airport
The fastest flight from London Heathrow Airport to Southeast Asia takes 13h 10m
Direct flights go from London Heathrow Airport to Southeast Asia every day.
There is 1 airport near Southeast Asia: Singapore Changi (SIN)
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 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 layovers. 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 travel and health documents required for your trip to Southeast Asia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Southeast Asia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
EVA AirPriceFrom ₹ 87,036Free CancellationRating
8.4
1,292 reviews
Search EVA Air 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?

momondo does allow users to show only those flights to Southeast Asia from London which offer a flexible booking policy as well as other useful filters and features.

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?

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, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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