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

Airlines like Air India, Shenzhen Airlines, and British Airways fly from London Heathrow Airport to Southeast Asia in about 13h 25m. The time it takes to get you to your destination can typically vary by up to 22h 25m. Airlines will cover a distance of 10874 km. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Southeast Asia ranges from 10.0 - 320.0 inches per month. September is typically the wettest month, when rainfall can reach 320.0 mm. January is typically the driest time to visit Southeast Asia when rainfall is around 10.0 mm.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.0 C).

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(84%), EVA Air(84%) or Air Canada(82%), 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.

₹ 34,892+ Cheap Flights from London Heathrow Airport to Southeast Asia

Cheap flight deals from Heathrow to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 13 September 2026.

Wed 30/922:05 -

1 stop36h 55m

Wed 7/1019:00 -

1 stop31h 50m

Deal found 8/9₹ 63,284

Wed 23/922:05 -

1 stop36h 55m

Tue 29/903:00 -

1 stop24h 00m

Deal found 8/9₹ 63,379

Sun 1/1121:05 -

1 stop35h 50m

Sun 8/1111:40 -

1 stop37h 10m

Deal found 9/9₹ 64,048

Sun 1/1121:05 -

1 stop35h 50m

Mon 9/1111:40 -

2 stops37h 20m

Deal found 9/9₹ 64,335

Fri 18/922:05 -

1 stop31h 15m

Fri 13/1103:00 -

1 stop24h 10m

Deal found 12/9₹ 64,717

Fri 30/1021:10 -

1 stop36h 05m

Thu 19/1118:45 -

1 stop32h 25m

Deal found 9/9₹ 64,813

Sun 18/1022:05 -

1 stop36h 55m

Sun 25/1003:00 -

1 stop24h 10m

Deal found 10/9₹ 64,909

Tue 8/1221:00 -

1 stop39h 25m

Tue 15/1218:00 -

1 stop31h 30m

Deal found 8/9₹ 65,100

Fri 30/1021:10 -

1 stop20h 50m

Wed 18/1118:45 -

1 stop33h 45m

Deal found 12/9₹ 65,482

Mon 2/1121:10 -

1 stop36h 05m

Tue 17/1118:45 -

1 stop32h 25m

Deal found 11/9₹ 65,578

Sat 31/1021:10 -

1 stop31h 20m

Sun 8/1113:40 -

1 stop37h 30m

Deal found 10/9₹ 65,673

Sun 8/1121:00 -

2 stops30h 40m

Sun 15/1115:30 -

2 stops34h 00m

Deal found 8/9₹ 65,960

Best flights from Heathrow to Southeast Asia
Discover carefully curated flight deals from Heathrow to Southeast Asia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Sun 1/1121:05 -

1 stop35h 50m

Mon 9/1111:40 -

1 stop29h 20m

Deal found 9/9₹ 64,048

Wed 4/1121:00 -

Nonstop13h 25m

Sun 15/1123:15 -

Nonstop14h 30m

Deal found 11/9₹ 76,284

Sun 1/1120:05 -

3 stops31h 15m

Mon 9/1110:00 -

2 stops25h 25m

Deal found 9/9₹ 79,248

Sat 26/920:50 -

Nonstop13h 40m

Sat 3/1023:20 -

Nonstop14h 15m

Deal found 12/9₹ 104,007

Wed 7/1009:05 -

1 stop22h 55m

Mon 12/1010:35 -

1 stop16h 40m

Deal found 11/9₹ 104,963

Sun 4/1020:50 -

2 stops40h 40m

Sun 18/1018:15 -

2 stops31h 55m

Deal found 13/9₹ 117,008

Sun 1/1121:05 -

1 stop35h 50m

Tue 10/1109:35 -

1 stop31h 25m

Deal found 9/9₹ 64,048

Mon 7/1209:05 -

2 stops25h 10m

Sun 3/110:40 -

2 stops19h 00m

Deal found 9/9₹ 168,246

Thu 7/121:10 -

1 stop15h 25m

Thu 14/123:15 -

Nonstop14h 30m

Deal found 10/9₹ 84,505

Sun 11/1022:00 -

Nonstop13h 40m

Sun 18/1019:15 -

1 stop17h 10m

Deal found 13/9₹ 84,505

Fri 30/1013:30 -

1 stop15h 55m

Mon 9/1110:30 -

2 stops30h 05m

Deal found 9/9₹ 95,977

Fri 30/1013:30 -

1 stop15h 55m

Tue 10/1110:30 -

2 stops30h 05m

Deal found 9/9₹ 101,521

Sat 24/1022:00 -

Nonstop13h 40m

Sun 8/1123:05 -

Nonstop14h 20m

Deal found 8/9₹ 98,367

Thu 7/120:05 -

2 stops40h 30m

Thu 14/106:20 -

2 stops20h 05m

Deal found 10/9₹ 125,420

Sun 11/1008:25 -

2 stops26h 05m

Sun 18/1021:15 -

2 stops28h 55m

Deal found 13/9₹ 125,611

Sun 1/1108:45 -

1 stop18h 50m

Wed 11/1111:40 -

1 stop24h 25m

Deal found 9/9₹ 143,870

Sun 11/1007:25 -

2 stops21h 45m

Sun 18/1018:25 -

2 stops24h 05m

Deal found 13/9₹ 158,591

Find flight deals from Heathrow to Southeast Asia

Round-trip from	₹ 63,284
One-way from	₹ 34,892
Popular in	December
Cheapest in	September
Average price	₹ 68,828

Shenzhen Airlines
30/9-7/10
2 total stops
68h 45m total
London to Southeast Asia

Search Deals

4/3-31/12
1 total stop
24h 10m total
London to Southeast Asia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (₹ 622,807 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (₹ 258,382 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

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

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Thu 4/3

19:00-03:10

1 stop24h 10m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

₹ 34,892

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Thu 21/1

19:00-03:10

1 stop24h 10m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

₹ 37,855

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Sun 10/1

19:00-03:10

1 stop24h 10m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

₹ 41,679

LondonPort Blair

LHR London Heathrow - IXZ Port Blair

LHRIXZ

London Heathrow

Mon 26/10

13:30-10:55

2 stops39h 55m

Port Blair

Wed 31/12

00:00-19:30

Nonstop0h 00m

₹ 43,495

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Sat 30/1

21:40-12:50

1 stop31h 10m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

₹ 47,797

LondonPort Blair

LHR London Heathrow - IXZ Port Blair

LHRIXZ

London Heathrow

Sat 10/10

15:50-09:45

3 stops37h 25m

Port Blair

Wed 31/12

00:00-19:30

Nonstop0h 00m

₹ 51,812

Fastest return journey

LondonPort Blair

LHR London Heathrow - IXZ Port Blair

LHRIXZ

London Heathrow

Mon 11/1

08:45-07:50

1 stop17h 35m

Port Blair

Wed 31/12

00:00-19:30

Nonstop0h 00m

₹ 52,290

LondonPort Blair

LHR London Heathrow - IXZ Port Blair

LHRIXZ

London Heathrow

Mon 11/1

08:50-14:20

3 stops24h 00m

Port Blair

Wed 31/12

00:00-19:30

Nonstop0h 00m

₹ 55,062

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Wed 24/2

19:25-21:40

2 stops18h 15m

Singapore Changi

Wed 31/12

00:00-17:30

Nonstop0h 00m

₹ 60,224

LondonPort Blair

LHR London Heathrow - IXZ Port Blair

LHRIXZ

London Heathrow

Sun 1/11

21:05-14:25

1 stop35h 50m

Port Blair

Mon 9/11

11:40-11:30

1 stop29h 20m

₹ 64,048

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 33 resultsSorted by cheapest first

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.

LHR-SIN

LHR-IXZ

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

LHR-zzYJX

LHR-SIN

LHR-IXZ

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 ₹ 80,013). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of ₹ 132,972). 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?

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

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

The best time to book flights from London Heathrow Airport to Southeast Asia is 61 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Southeast Asia

Get a feel of what it's like to fly with Cathay Pacific from London Heathrow Airport to Southeast Asia by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Cathay Pacific

7.6

Good

1,482 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jul 2026

CGK - HKG

food quality is horrible for premium economy. one of the worst in the airlines. flight attendants is mediocre. won't flight this anymore. better to use Starlux, SQ, or ANA/JAL.

Cathay Pacific

7.6

Good

1,482 reviews

Cathay Pacific

7.6

Good

1,482 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jul 2026

CGK - HKG

food quality is horrible for premium economy. one of the worst in the airlines. flight attendants is mediocre. won't flight this anymore. better to use Starlux, SQ, or ANA/JAL.

Related info for your journey

How long is the flight from London Heathrow Airport to Southeast Asia?
Airlines like Air India, Shenzhen Airlines, and British Airways fly from London Heathrow Airport to Southeast Asia in about 13h 25m. The time it takes to get you to your destination can typically vary by up to 22h 25m. 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(84%), EVA Air(84%) or Air Canada(82%), 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 ₹ 80,013). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of ₹ 132,972). 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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Top 2 airlines flying from Heathrow to Southeast Asia

Airline	Cheapest	Average	Flexibility	On-time
Etihad Airways	Cheapest₹ 65,507	Average₹ 81,416	FlexibilityNo cancel fee	On-time75%	Search Etihad Airways flights
EVA Air	Cheapest₹ 92,461	Average₹ 117,807	FlexibilityNo cancel fee	On-time74%	Search EVA Air flights

Fly with Cheapflights

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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Cheap flights from London Heathrow Airport to Southeast Asia from ₹ 34,892

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Southeast Asia

Cheapest flights from Heathrow to Southeast AsiaExplore 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 13 September 2026.

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 13 September 2026.

Best flights from Heathrow to Southeast AsiaDiscover carefully curated flight deals from Heathrow to Southeast Asia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Discover carefully curated flight deals from Heathrow to Southeast Asia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Direct flights from Heathrow to Southeast AsiaExplore direct flight options from Heathrow to Southeast Asia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Explore direct flight options from Heathrow to Southeast Asia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Last-minute flights from Heathrow to Southeast AsiaDiscover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 13 September 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Heathrow to Southeast AsiaSearch for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Search for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Find flight deals from Heathrow to Southeast Asia

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

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.

Cheapflights Insights

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

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 13 September 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

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

The best time to book flights from London Heathrow Airport to Southeast Asia is 61 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Southeast Asia

Get a feel of what it's like to fly with Cathay Pacific from London Heathrow Airport to Southeast Asia by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Southeast Asia by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Heathrow to Southeast Asia by cabin class

Find flights from Heathrow to Southeast Asia, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Southeast Asia flights

Browse other Heathrow and Southeast Asia flight options. Last updated on 13 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Heathrow to Southeast Asia flights

Consider these flights travelling from Heathrow to Southeast Asia.

Top 2 airlines flying from Heathrow to Southeast Asia

Fly with Cheapflights

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

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

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

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

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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 13 September 2026.

Best flights from Heathrow to Southeast Asia
Discover carefully curated flight deals from Heathrow to Southeast Asia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Direct flights from Heathrow to Southeast Asia
Explore direct flight options from Heathrow to Southeast Asia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 September 2026.

Last-minute flights from Heathrow to Southeast Asia
Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Heathrow to Southeast Asia
Search for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.