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Cheap flights from London Heathrow Airport to Southeast Asia from ₹ 39,801

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
21 May — 28 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Southeast Asia
Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 April 2026.

Sat 3/1022:05
LHR
-
SIN
1 stop31h 15m
Shenzhen Airlines
Thu 29/1018:30
SIN
-
LHR
1 stop32h 40m
Shenzhen Airlines
Deal found 21/4₹ 65,933
Wed 20/522:05
LHR
-
SIN
1 stop20h 55m
Shenzhen Airlines
Thu 4/618:10
SIN
-
LHR
1 stop32h 50m
Shenzhen Airlines
Deal found 17/4₹ 66,026
Wed 20/522:05
LHR
-
SIN
1 stop35h 35m
Shenzhen Airlines
Thu 4/603:00
SIN
-
LHR
1 stop24h 00m
Shenzhen Airlines
Deal found 16/4₹ 66,119
Sun 26/421:20
LHR
-
SIN
1 stop25h 05m
China Eastern
Tue 12/500:55
SIN
-
LHR
1 stop24h 45m
China Eastern
Deal found 20/4₹ 69,559
Sun 1/1121:00
LHR
-
SIN
1 stop24h 25m
China Eastern
Thu 12/1100:25
SIN
-
LHR
1 stop25h 05m
China Eastern
Deal found 19/4₹ 69,652
Sun 13/910:00
LHR
-
SIN
1 stop19h 45m
Gulf Air
Thu 17/920:00
SIN
-
LHR
1 stop26h 20m
Gulf Air
Deal found 20/4₹ 69,931
Thu 10/910:00
LHR
-
SIN
1 stop19h 45m
Gulf Air
Mon 21/920:00
SIN
-
LHR
1 stop17h 55m
Gulf Air
Deal found 19/4₹ 70,024
Tue 15/910:00
LHR
-
SIN
1 stop19h 45m
Gulf Air
Thu 1/1020:00
SIN
-
LHR
1 stop26h 20m
Gulf Air
Deal found 17/4₹ 70,117
Thu 10/910:00
LHR
-
SIN
1 stop19h 45m
Gulf Air
Wed 23/920:00
SIN
-
LHR
1 stop26h 20m
Gulf Air
Deal found 16/4₹ 70,210
Sun 8/1121:00
LHR
-
SIN
1 stop24h 25m
China Eastern
Thu 24/1212:40
SIN
-
LHR
2 stops60h 50m
China Eastern
Deal found 16/4₹ 70,489
Wed 29/421:20
LHR
-
SIN
2 stops34h 05m
China Eastern
Mon 11/502:30
SIN
-
LHR
2 stops47h 10m
China Eastern
Deal found 20/4₹ 70,954
Thu 4/622:10
LHR
-
IXZ
2 stops32h 20m
Air India
Thu 11/611:40
IXZ
-
LHR
1 stop24h 20m
Air India
Deal found 20/4₹ 72,628

Find flight deals from Heathrow to Southeast Asia

Keep the following information in mind while searching for Heathrow to Southeast Asia flight deals. Data was last updated 21 April 2026.

Round-trip from

₹ 65,933

One-way from

₹ 39,801

Popular in

December

Cheapest in

May

Average price

₹ 76,441
Shenzhen Airlines
  • Shenzhen Airlines
  • 3/10-27/10
  • 2 total stops
  • 63h 55m total
  • London to Southeast Asia
Search Deals
14/5
  • 14/5
  • 1 total stop
  • 25h 35m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (₹ 398,369 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (₹ 206,184 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 454,620 searches. Data last updated 21 April 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

Cheapest return flight

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Thu 4/6

22:10-11:00

2 stops32h 20m

Port Blair

Thu 11/6

11:40-07:30

1 stop24h 20m

₹ 72,628

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 11/9

10:00-12:45

1 stop19h 45m

Singapore Changi

Mon 21/9

20:00-06:55

1 stop17h 55m

₹ 73,186

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Mon 18/5

13:15-11:00

1 stop17h 15m

Port Blair

Mon 25/5

11:40-19:00

1 stop35h 50m

₹ 73,372

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 19/6

14:45-09:40

1 stop35h 55m

Singapore Changi

Mon 29/6

21:00-12:45

1 stop22h 45m

₹ 75,325

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Thu 4/6

14:45-14:15

2 stops19h 00m

Port Blair

Thu 11/6

07:25-12:45

3 stops33h 50m

₹ 76,348

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Mon 18/5

14:45-14:15

2 stops19h 00m

Port Blair

Mon 25/5

09:10-07:00

2 stops26h 20m

₹ 78,859

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 9/5

14:45-09:40

1 stop35h 55m

Singapore Changi

Mon 11/5

21:00-07:00

1 stop17h 00m

₹ 79,231

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Fri 15/5

13:15-11:00

1 stop17h 15m

Port Blair

Wed 20/5

11:40-19:00

1 stop35h 50m

₹ 89,367

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 8/6

19:30-21:55

2 stops19h 25m

Singapore Changi

Tue 16/6

18:30-11:25

2 stops23h 55m

₹ 93,924

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 20/5

14:25-20:30

2 stops23h 05m

Singapore Changi

Wed 27/5

10:35-20:15

1 stop16h 40m

₹ 102,386

Flights are sorted by cheapest return flights first.

Deals found on 19/4

Showing 1-10 of 29 resultsSorted by cheapest first
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Best time to book a flight from Heathrow to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Southeast Asia

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of ₹ 76,906). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of ₹ 125,449). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to YJX?

Find hourly flight availability from Heathrow to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.

Weekly flight availability from London Heathrow Airport to Southeast Asia

Explore weekly flight availability from Heathrow to Southeast Asia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 21 April 2026.

The most flights from LHR to zzYJX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Heathrow Airport to Southeast Asia?

    Airlines like Air India, Gulf Air, and Etihad Airways fly from London Heathrow Airport to Southeast Asia in about 19h 45m. The time it takes to get you to your destination can typically vary by up to 16h 10m. Airlines will cover a distance of 10874 km. This flight may include one or multiple stops.

  • What are the most reliable airlines from London Heathrow Airport to Southeast Asia?

    No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Southeast Asia consider choosing Thai Airways(77%), Air Canada(74%) or EVA Air(71%), as they are the most reliable in getting you off to your destination on time.

  • Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on Heathrow to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southeast Asia.

  • Can I find deals for business class flights from Heathrow to Southeast Asia?

    Yes. Cheapflights offers flight deals from Heathrow to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

    Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of ₹ 76,906). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of ₹ 125,449). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Heathrow to Southeast Asia

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Southeast Asia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Southeast Asia for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Certainly. Search results for flights to Southeast Asia from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

Yes! Start tracking prices for Heathrow to Southeast Asia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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