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Cheap flights from London Heathrow Airport to Southeast Asia from ₹ 35,888

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 28/2. 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

Multiple Airlines Logo
17:50 - 17:25LHR-SIN
15h 35m1 stop
Multiple Airlines Logo
00:05 - 08:05SIN-LHR
16h 00m1 stop
₹ 54,229Multiple Airlines
Find Deal
Thu, 30 Oct - Wed, 5 Nov
Multiple Airlines Logo
17:50 - 17:25LHR-SIN
15h 35m1 stop
Multiple Airlines Logo
00:05 - 08:05SIN-LHR
16h 00m1 stop
₹ 54,318Multiple Airlines
Find Deal
Thu, 6 Nov - Tue, 11 Nov
Lufthansa Logo
17:50 - 17:25LHR-SIN
15h 35m1 stop
Lufthansa Logo
23:55 - 10:45SIN-LHR
18h 50m1 stop
₹ 54,494Lufthansa
Find Deal
Fri, 6 Mar - Sun, 22 Mar
Lufthansa Logo
17:50 - 17:25LHR-SIN
15h 35m1 stop
Lufthansa Logo
23:55 - 09:45SIN-LHR
17h 50m1 stop
₹ 54,670Lufthansa
Find Deal
Fri, 6 Mar - Sun, 22 Mar
Air India Logo
08:45 - 09:05LHR-IXZ
18h 50m1 stop
Air India Logo
14:30 - 19:30IXZ-LHR
34h 30m1 stop
₹ 55,464Air India
Find Deal
Wed, 29 Oct - Wed, 5 Nov
SWISS Logo
18:40 - 18:00LHR-SIN
15h 20m1 stop
SWISS Logo
00:05 - 11:15SIN-LHR
19h 10m1 stop
₹ 56,169SWISS
Find Deal
Wed, 12 Nov - Mon, 24 Nov
Air India Logo
13:30 - 13:50LHR-IXZ
18h 50m2 stops
Air India Logo
14:30 - 19:30IXZ-LHR
34h 30m1 stop
₹ 56,434Air India
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Gulf Air Logo
22:05 - 12:20LHR-SIN
31h 15m1 stop
Gulf Air Logo
20:00 - 06:55SIN-LHR
17h 55m1 stop
₹ 58,021Gulf Air
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Thu, 2 Oct - Wed, 8 Oct
Gulf Air Logo
22:05 - 12:20LHR-SIN
31h 15m1 stop
Gulf Air Logo
20:00 - 06:55SIN-LHR
17h 55m1 stop
₹ 58,197Gulf Air
Find Deal
Wed, 8 Oct - Tue, 14 Oct
SWISS Logo
20:05 - 18:00LHR-SIN
37h 55m1 stop
SWISS Logo
00:05 - 08:05SIN-LHR
16h 00m1 stop
₹ 58,462SWISS
Find Deal
Thu, 6 Nov - Tue, 18 Nov

Lufthansa flights from London Heathrow Airport to Southeast Asia

Our best Lufthansa deals on London Heathrow Airport to Southeast Asia flight tickets
Lufthansa
6 Mar
LHR17:50London Heathrow
15h 35m
1 stop
SIN17:25Singapore Changi
21 Mar
SIN23:55Singapore Changi
16h 50m
1 stop
LHR08:45London Heathrow
₹ 54,494
Find similar
Lufthansa
6 Mar
LHR17:50London Heathrow
15h 35m
1 stop
SIN17:25Singapore Changi
20 Mar
SIN23:55Singapore Changi
16h 50m
1 stop
LHR08:45London Heathrow
₹ 54,670
Find similar
Lufthansa
20 Nov
LHR17:50London Heathrow
15h 35m
1 stop
SIN17:25Singapore Changi
16 Dec
SIN23:45Singapore Changi
16h 20m
1 stop
LHR08:05London Heathrow
₹ 56,081
Find similar

SWISS flights from London Heathrow Airport to Southeast Asia

Our best SWISS deals on London Heathrow Airport to Southeast Asia flight tickets
SWISS
12 Nov
LHR18:40London Heathrow
15h 20m
1 stop
SIN18:00Singapore Changi
24 Nov
SIN00:05Singapore Changi
19h 10m
1 stop
LHR11:15London Heathrow
₹ 56,169
Find similar
SWISS
6 Nov
LHR20:05London Heathrow
37h 55m
1 stop
SIN18:00Singapore Changi
18 Nov
SIN00:05Singapore Changi
16h 00m
1 stop
LHR08:05London Heathrow
₹ 58,462
Find similar
SWISS
6 Nov
LHR20:05London Heathrow
37h 55m
1 stop
SIN18:00Singapore Changi
18 Nov
SIN00:05Singapore Changi
16h 00m
1 stop
LHR08:05London Heathrow
₹ 59,167
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 16 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

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 30/10

17:50-17:25

1 stop15h 35m

Singapore Changi

Wed 5/11

00:05-08:05

1 stop16h 00m

₹ 54,229

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 6/11

17:50-17:25

1 stop15h 35m

Singapore Changi

Tue 11/11

00:05-08:05

1 stop16h 00m

₹ 54,318

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 6/3

17:50-17:25

1 stop15h 35m

Singapore Changi

Sun 22/3

23:55-10:45

1 stop18h 50m

₹ 54,494

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 6/3

17:50-17:25

1 stop15h 35m

Singapore Changi

Sun 22/3

23:55-09:45

1 stop17h 50m

₹ 54,670

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Wed 29/10

08:45-09:05

1 stop18h 50m

Port Blair

Wed 5/11

14:30-19:30

1 stop34h 30m

₹ 55,464

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 12/11

18:40-18:00

1 stop15h 20m

Singapore Changi

Mon 24/11

00:05-11:15

1 stop19h 10m

₹ 56,169

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Wed 29/10

13:30-13:50

2 stops18h 50m

Port Blair

Wed 5/11

14:30-19:30

1 stop34h 30m

₹ 56,434

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 2/10

22:05-12:20

1 stop31h 15m

Singapore Changi

Wed 8/10

20:00-06:55

1 stop17h 55m

₹ 58,021

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 8/10

22:05-12:20

1 stop31h 15m

Singapore Changi

Tue 14/10

20:00-06:55

1 stop17h 55m

₹ 58,197

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 6/11

20:05-18:00

1 stop37h 55m

Singapore Changi

Tue 18/11

00:05-08:05

1 stop16h 00m

₹ 58,462

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, May 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 ₹ 72,835. If you aren’t able to travel during the month of May, then book flights to Southeast Asia from London Heathrow Airport during June instead. Flights to Southeast Asia in June, while not as cheap as those in May, still average around ₹ 73,364.

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 ₹ 85,288. The most expensive day to fly to Southeast Asia is Wednesday, with ticket prices averaging around ₹ 125,230.

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 ₹ 70,145. 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 ₹ 114,258 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 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 ₹ 83,357 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 ₹ 76,715 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 00m

Direct flights

Every day

Airports in Southeast Asia

1 airport
The fastest flight from London Heathrow Airport to Southeast Asia takes 13h 00m
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 ₹ 85,288Free CancellationRating
8.4
1,236 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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