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

Etihad Airways, Scandinavian Airlines, and Gulf Air can get you from London Heathrow Airport to Southeast Asia in just under 17h 15m. Your travel time can differ by up to 11h 40m. Airlines will cover a distance of 9571 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 popular routes from London Heathrow Airport to Southeast Asia?

The most popular route from London Heathrow Airport to Southeast Asia is London Heathrow - Bangkok Suvarnabhumi. You may also consider London Heathrow - Singapore Changi or London Heathrow - Kuala Lumpur Intl.

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Looking at all options, your cheapest flight can be booked for $933. While the most popular route (London Heathrow - Bangkok Suvarnabhumi) can be booked for $835 on average, our data indicates $1,864 when flying from London Heathrow Airport to Southeast Asia.

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

Consider EVA Air (85%), Thai Airways (85%) or Air Canada (80%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Southeast Asia.

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.

$473+ 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.

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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 31 August 2026.

Mon 2/1121:10 -

1 stop21h 10m

Sun 15/1117:55 -

1 stop32h 15m

Deal found 30/8$835

Mon 2/1121:00 -

2 stops30h 05m

Sun 15/1119:10 -

2 stops30h 05m

Deal found 30/8$840

Sun 11/1022:10 -

1 stop21h 20m

Sun 18/1019:00 -

1 stop30h 20m

Deal found 27/8$849

Wed 2/921:20 -

1 stop17h 35m

Sun 6/919:10 -

1 stop29h 30m

Deal found 27/8$876

Mon 2/1121:10 -

1 stop21h 10m

Sun 15/1102:20 -

1 stop23h 50m

Deal found 30/8$881

Fri 6/1121:10 -

1 stop36h 45m

Tue 1/1217:55 -

1 stop32h 15m

Deal found 31/8$882

Wed 28/1021:10 -

1 stop21h 10m

Thu 19/1117:55 -

1 stop32h 15m

Deal found 29/8$883

Mon 2/1121:10 -

1 stop31h 00m

Sun 29/1102:20 -

1 stop23h 50m

Deal found 28/8$885

Sat 28/1121:10 -

1 stop21h 10m

Tue 8/1202:20 -

1 stop23h 50m

Deal found 27/8$886

Mon 2/1121:10 -

1 stop36h 45m

Thu 26/1102:20 -

1 stop23h 50m

Deal found 26/8$888

Sun 11/1006:00 -

2 stops19h 50m

Sun 18/1019:20 -

2 stops30h 10m

Deal found 27/8$916

Wed 2/921:20 -

2 stops22h 00m

Mon 7/916:50 -

1 stop31h 50m

Deal found 29/8$923

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 31 August 2026.

Tue 20/1021:45 -

1 stop28h 55m

Thu 29/1019:25 -

1 stop19h 15m

Deal found 31/8$1,044

Thu 19/1110:20 -

1 stop17h 15m

Fri 11/1212:35 -

2 stops33h 00m

Deal found 29/8$1,091

Fri 20/1121:10 -

Nonstop12h 55m

Sun 6/1223:15 -

Nonstop14h 05m

Deal found 28/8$1,146

Wed 28/1009:25 -

1 stop15h 25m

Tue 3/1100:25 -

1 stop18h 50m

Deal found 29/8$1,188

Sat 31/1009:30 -

2 stops22h 00m

Thu 26/1117:35 -

2 stops21h 00m

Deal found 26/8$1,235

Fri 12/211:20 -

1 stop59h 15m

Sun 21/208:15 -

1 stop22h 15m

Deal found 30/8$1,290

Wed 27/110:25 -

Nonstop12h 50m

Sat 15/523:30 -

Nonstop13h 25m

Deal found 28/8$1,298

Thu 17/911:00 -

Nonstop12h 45m

Wed 30/909:50 -

Nonstop13h 45m

Deal found 28/8$1,309

Thu 10/908:55 -

2 stops18h 55m

Thu 24/912:35 -

1 stop25h 20m

Deal found 29/8$1,369

Tue 17/1116:40 -

2 stops19h 00m

Wed 25/1120:35 -

2 stops21h 50m

Deal found 29/8$1,408

Thu 21/115:45 -

2 stops18h 50m

Mon 25/118:20 -

2 stops20h 20m

Deal found 30/8$1,419

Tue 17/1115:45 -

2 stops18h 50m

Tue 1/1211:55 -

1 stop16h 30m

Deal found 28/8$1,470

Wed 21/1019:30 -

2 stops17h 10m

Wed 28/1010:40 -

2 stops19h 00m

Deal found 29/8$1,552

Thu 15/1021:35 -

Nonstop11h 45m

Fri 23/1012:20 -

Nonstop13h 00m

Deal found 28/8$1,553

Wed 14/1020:50 -

2 stops40h 40m

Wed 21/1009:35 -

2 stops40h 35m

Deal found 30/8$1,771

Mon 12/1014:45 -

1 stop35h 55m

Wed 28/1019:25 -

1 stop19h 15m

Deal found 30/8$1,087

Sun 13/919:25 -

Nonstop13h 45m

Wed 23/923:25 -

Nonstop14h 10m

Deal found 26/8$1,185

Sun 6/1215:30 -

1 stop20h 25m

Wed 16/1200:25 -

1 stop20h 35m

Deal found 30/8$1,206

Mon 11/121:05 -

2 stops30h 30m

Mon 18/112:35 -

2 stops33h 00m

Deal found 28/8$1,308

Wed 27/109:30 -

2 stops22h 00m

Sat 15/517:35 -

2 stops20h 20m

Deal found 28/8$1,308

Sun 17/120:55 -

1 stop31h 50m

Sat 27/214:40 -

1 stop23h 00m

Deal found 27/8$1,196

Sat 31/1021:10 -

1 stop15h 25m

Sun 15/1123:15 -

Nonstop14h 30m

Deal found 29/8$1,224

Sun 1/1109:25 -

1 stop14h 15m

Sat 14/1102:00 -

1 stop18h 25m

Deal found 30/8$1,257

Thu 11/206:25 -

1 stop18h 05m

Thu 25/219:25 -

2 stops21h 20m

Deal found 28/8$1,495

Sun 13/1206:00 -

1 stop28h 05m

Tue 29/1200:05 -

1 stop20h 55m

Deal found 28/8$1,499

Sun 18/1021:35 -

Nonstop11h 45m

Sun 25/1012:40 -

Nonstop13h 25m

Deal found 28/8$1,553

Wed 27/115:45 -

2 stops18h 50m

Tue 9/218:20 -

2 stops21h 40m

Deal found 31/8$1,577

Sun 4/1010:00 -

2 stops22h 05m

Fri 16/1012:55 -

2 stops24h 00m

Deal found 28/8$1,442

Thu 1/1019:30 -

2 stops19h 25m

Sun 11/1018:30 -

2 stops20h 50m

Deal found 28/8$1,632

Tue 29/909:30 -

1 stop15h 25m

Tue 13/1022:50 -

Nonstop13h 35m

Deal found 30/8$1,350

Find flight deals from Heathrow to Southeast Asia

Round-trip from	$835
One-way from	$473
Popular in	December
Cheapest in	September
Average price	$1,306

Shenzhen Airlines
2/11-15/11
2 total stops
53h 25m total
London to Southeast Asia

Search Deals

7/9
2 total stops
33h 40m total
London to Southeast Asia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($131 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($56 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 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

Tue 20/10

21:45-09:40

1 stop28h 55m

Singapore Changi

Thu 29/10

19:25-06:40

1 stop19h 15m

$1,044

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Mon 12/10

14:45-09:40

1 stop35h 55m

Singapore Changi

Wed 28/10

19:25-06:40

1 stop19h 15m

$1,087

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Thu 19/11

10:20-10:35

1 stop17h 15m

Bangkok Suvarnabhumi

Fri 11/12

12:35-14:35

2 stops33h 00m

$1,091

LondonKuala Lumpur

LHR London Heathrow - KUL Kuala Lumpur Intl

LHRKUL

London Heathrow

Fri 20/11

21:10-18:05

Nonstop12h 55m

Kuala Lumpur Intl

Sun 6/12

23:15-05:20

Nonstop14h 05m

$1,146

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Sun 13/9

19:25-16:10

Nonstop13h 45m

Singapore Changi

Wed 23/9

23:25-06:35

Nonstop14h 10m

$1,185

LondonPhuket City

LHR London Heathrow - HKT Phuket City

LHRHKT

London Heathrow

Wed 28/10

09:25-07:50

1 stop15h 25m

Phuket City

Tue 3/11

00:25-12:15

1 stop18h 50m

$1,188

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Sun 17/1

20:55-11:45

1 stop31h 50m

Bangkok Suvarnabhumi

Sat 27/2

14:40-06:40

1 stop23h 00m

$1,196

LondonPhuket City

LHR London Heathrow - HKT Phuket City

LHRHKT

London Heathrow

Sun 6/12

15:30-18:55

1 stop20h 25m

Phuket City

Wed 16/12

00:25-14:00

1 stop20h 35m

$1,206

LondonSingapore

LHR London Heathrow - SIN Singapore Changi

LHRSIN

London Heathrow

Sat 31/10

21:10-20:35

1 stop15h 25m

Singapore Changi

Sun 15/11

23:15-05:45

Nonstop14h 30m

$1,224

LondonKuala Lumpur

LHR London Heathrow - KUL Kuala Lumpur Intl

LHRKUL

London Heathrow

Sat 31/10

09:30-15:30

2 stops22h 00m

Kuala Lumpur Intl

Thu 26/11

17:35-06:35

2 stops21h 00m

$1,235

Flights are sorted by cheapest return flights first.

Deals found on 29/8

Showing 1-10 of 60 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-BKK

LHR-KUL

LHR-SIN

LHR-HKT

LHR-DPS

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-BKK

LHR-KUL

LHR-SIN

LHR-HKT

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 $1,161). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $1,934). 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?

When flying from London Heathrow Airport to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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?

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Southeast Asia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

How long is the flight from London Heathrow Airport to Southeast Asia?
Etihad Airways, Scandinavian Airlines, and Gulf Air can get you from London Heathrow Airport to Southeast Asia in just under 17h 15m. Your travel time can differ by up to 11h 40m. Airlines will cover a distance of 9571 km. This flight may include one or multiple stops.
What are the most popular routes from London Heathrow Airport to Southeast Asia?
The most popular route from London Heathrow Airport to Southeast Asia is London Heathrow - Bangkok Suvarnabhumi. You may also consider London Heathrow - Singapore Changi or London Heathrow - Kuala Lumpur Intl.
What are the most reliable airlines from London Heathrow Airport to Southeast Asia?
Consider EVA Air (85%), Thai Airways (85%) or Air Canada (80%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Southeast Asia.
What are the cheapest flights from London Heathrow Airport to Southeast Asia?
Looking at all options, your cheapest flight can be booked for $933. While the most popular route (London Heathrow - Bangkok Suvarnabhumi) can be booked for $835 on average, our data indicates $1,864 when flying from London Heathrow Airport to Southeast Asia.
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 $1,161). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $1,934). 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.

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When you search for this flight from Heathrow to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Southeast Asia flexibly with Cheapflights today.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Southeast Asia from Heathrow today and book when prices fit your budget.

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Cheap flights from London Heathrow Airport to Southeast Asia from $473

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 7/9. 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 31 August 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 31 August 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 31 August 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 31 August 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 31 August 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 31 August 2026.

Last-minute flights from Heathrow to Southeast AsiaDiscover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 31 August 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 31 August 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 31 August 2026.

Search for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.

Find flight deals from Heathrow to Southeast Asia

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Popular in

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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 31 August 2026.

When flying from London Heathrow Airport to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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?

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Southeast Asia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

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

What are the most popular routes from London Heathrow Airport to Southeast Asia?

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

What are the cheapest flights 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

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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 31 August 2026.

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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 31 August 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 31 August 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 31 August 2026.

Last-minute flights from Heathrow to Southeast Asia
Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 31 August 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 31 August 2026.