Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Southeast Asia from $639

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
22 Jan — 29 Jan1
1 adult

Cheap flight deals from Heathrow to Southeast Asia

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Southeast Asia (zzYJX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 January 2025.

Round-trip from

$985

One-way from

$639
Shenzhen Airlines
  • Shenzhen Airlines
  • 14/3-8/4
  • 2 total stops
  • 68h 50m total
  • London to Southeast Asia
6/4
  • 6/4
  • 1 total stop
  • 20h 35m total
  • London to Southeast Asia

Find flight deals from Heathrow to Southeast Asia

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 17 January 2025.

Thu 23/111:45LHR - SIN
2 stops21h 10mMultiple Airlines
Thu 30/122:55SIN - LHR
1 stop22h 50mMultiple Airlines
Deal found 16/1$980
Thu 23/111:45LHR - SIN
2 stops21h 10mKLM
Wed 29/101:40SIN - LHR
1 stop20h 10mKLM
Deal found 16/1$982
Fri 14/321:10LHR - SIN
1 stop30h 30mShenzhen Airlines
Tue 8/412:40SIN - LHR
1 stop38h 20mShenzhen Airlines
Deal found 16/1$985
Thu 27/209:00LHR - SIN
1 stop16h 35mEtihad Airways
Thu 13/319:25SIN - LHR
1 stop27h 05mEtihad Airways
Deal found 17/1$996
Mon 10/221:10LHR - HKT
1 stop36h 10mShenzhen Airlines
Thu 20/217:25HKT - LHR
1 stop32h 45mShenzhen Airlines
Deal found 17/1$998
Wed 22/121:10LHR - BKK
1 stop21h 55mShenzhen Airlines
Thu 20/212:10BKK - LHR
1 stop38h 00mShenzhen Airlines
Deal found 15/1$1,014
Tue 13/507:30LHR - BKK
1 stop16h 00mFinnair
Tue 27/507:05BKK - LHR
1 stop19h 35mFinnair
Deal found 16/1$1,015
Mon 31/310:20LHR - SIN
1 stop25h 05mFinnair
Mon 7/421:35SIN - LHR
1 stop31h 35mFinnair
Deal found 16/1$1,044
Mon 24/308:40LHR - BKK
2 stops17h 35mMultiple Airlines
Wed 21/511:35BKK - LHR
1 stop15h 50mMultiple Airlines
Deal found 16/1$1,044
Tue 11/309:30LHR - BKK
1 stop16h 45mGulf Air
Mon 24/319:15BKK - LHR
1 stop26h 30mGulf Air
Deal found 17/1$1,060
Sun 23/209:30LHR - SIN
1 stop19h 00mGulf Air
Fri 14/320:25SIN - LHR
1 stop26h 20mGulf Air
Deal found 17/1$1,067
Tue 23/909:55LHR - BKK
2 stops17h 20mKLM
Tue 7/1012:05BKK - LHR
1 stop14h 50mKLM
Deal found 17/1$1,069

Find flights from Heathrow to Southeast Asia within your budget

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 647,157 searches. Data last updated 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 23/1

11:45-16:55

2 stops21h 10m

Singapore Changi

Thu 30/1

22:55-13:45

1 stop22h 50m

$980

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 23/1

11:45-16:55

2 stops21h 10m

Singapore Changi

Wed 29/1

01:40-13:50

1 stop20h 10m

$982

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 14/3

21:10-11:40

1 stop30h 30m

Singapore Changi

Fri 4/4

18:10-19:50

1 stop32h 40m

$985

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 6/3

09:00-09:35

1 stop16h 35m

Singapore Changi

Tue 11/3

19:25-06:45

1 stop19h 20m

$996

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Mon 10/2

21:10-16:20

1 stop36h 10m

Phuket City

Thu 20/2

17:25-19:10

1 stop32h 45m

$998

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 13/5

07:30-05:30

1 stop16h 00m

Bangkok Suvarnabhumi

Tue 27/5

07:05-20:40

1 stop19h 35m

$1,015

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 31/3

10:20-18:25

1 stop25h 05m

Singapore Changi

Mon 7/4

21:35-22:10

1 stop31h 35m

$1,044

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 24/3

08:40-09:15

2 stops17h 35m

Bangkok Suvarnabhumi

Wed 21/5

11:35-21:25

1 stop15h 50m

$1,044

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 19/2

17:00-20:35

2 stops19h 35m

Singapore Changi

Tue 25/2

12:10-07:20

2 stops27h 10m

$1,057

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 11/3

09:30-09:15

1 stop16h 45m

Bangkok Suvarnabhumi

Mon 24/3

19:15-14:45

1 stop26h 30m

$1,060

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 60 results
1
2
3
...
6

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.

Travel insights for flights from Heathrow to Southeast Asia

Get recent, data-driven insights about flights from Heathrow to Southeast Asia including ideal travel times, pricing trends, and more.

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $489). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $911). 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 17 January 2025.

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

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 17 January 2025.

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).

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

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.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated 17 January 2025.
Read reviews from past customers who have flown Turkish Airlines, KLM and Vietnam Airlines from London to Southeast Asia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.4
Very Good
1,248 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.2

Crew

8.6

Food

8.0

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

8.4
Very Good
1,248 reviews
8.4
Very Good
1,248 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.2

Crew

8.6

Food

8.0

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

8.3
Very Good
466 reviews
8.4
Very Good
1,248 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.2

Crew

8.6

Food

8.0

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

8.2
Very Good
737 reviews
8.4
Very Good
1,248 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.2

Crew

8.6

Food

8.0

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

8.1
Very Good
1,327 reviews
8.4
Very Good
1,248 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.2

Crew

8.6

Food

8.0

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

8.1
Very Good
3,351 reviews
8.4
Very Good
1,248 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.2

Crew

8.6

Food

8.0

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

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.
  • What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

    To fly one-way, consider booking your trip with Singapore Airlines, which is currently one of the cheapest options available, starting at $647. Shenzhen Airlines flights start at $655 while deals on Air China start at $692 one-way.

  • 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?

    Consider Air Canada (67%), Thai Airways (58%) or EVA Air (47%) 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 $641. While the most popular route (London Heathrow - Bangkok Suvarnabhumi) can be booked for $986 on average our data indicates $3,682 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $489). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $911). 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

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.

Top 3 airlines flying from Heathrow to Southeast Asia

Discover the top 3 airlines that operate flights from Heathrow to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$915Average$993FlexibilityNo cancel feeOn-time67%
Search Air China flights
Etihad AirwaysCheapest$1,406Average$1,412FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Thai AirwaysCheapest$1,510Average$1,869FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

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?

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.

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

Cheapflights helps you find that perfect flight to Southeast Asia from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.