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Cheap flights from London Heathrow Airport to Southeast Asia from $642

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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
23 7월 — 30 7월1
1 adult

Cheap 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 18 7월 2025.

Round-trip from

$1,012

One-way from

$656

Popular in

December

Cheapest in

May

Average price

$1,734
Lufthansa
  • Lufthansa
  • 5/9-16/9
  • 2 total stops
  • 44h 15m total
  • London to Southeast Asia
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Lufthansa
  • Lufthansa
  • 15/11
  • 1 total stop
  • 25h 25m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($185 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($72 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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 18 7월 2025.

금 5/906:55LHR - SIN
1 stop26h 45mLufthansa
화 16/923:25SIN - LHR
1 stop17h 30mLufthansa
Deal found 17/7$1,012
월 15/907:00LHR - SIN
2 stops27h 05mSWISS
수 1/1023:20SIN - LHR
1 stop15h 35mSWISS
Deal found 17/7$1,026
금 5/922:05LHR - SIN
1 stop21h 25mShenzhen Airlines
토 13/912:55SIN - LHR
1 stop38h 05mShenzhen Airlines
Deal found 17/7$1,033
토 9/820:35LHR - SIN
1 stop27h 40mAir India
목 14/820:30SIN - LHR
1 stop18h 00mAir India
Deal found 17/7$1,043
토 13/914:45LHR - SIN
1 stop35h 55mEtihad Airways
수 1/1021:10SIN - LHR
1 stop25h 05mEtihad Airways
Deal found 17/7$1,050
화 9/920:50LHR - BKK
1 stop28h 05mOman Air
목 18/909:00BKK - LHR
1 stop16h 10mOman Air
Deal found 16/7$1,058
수 29/1021:10LHR - BKK
1 stop22h 05mShenzhen Airlines
일 2/1112:10BKK - LHR
1 stop38h 00mShenzhen Airlines
Deal found 16/7$1,061
일 24/806:00LHR - BKK
1 stop21h 45mSWISS
수 17/912:35BKK - LHR
1 stop25h 20mSWISS
Deal found 18/7$1,089
일 2/1121:50LHR - SIN
1 stop30h 40mGulf Air
월 9/320:25SIN - LHR
1 stop18h 10mGulf Air
Deal found 17/7$1,101
화 26/807:25LHR - BKK
1 stop24h 45mLufthansa
화 23/923:00BKK - LHR
2 stops16h 40mLufthansa
Deal found 17/7$1,101
금 22/807:30LHR - SIN
1 stop27h 55mFinnair
월 8/921:35SIN - LHR
1 stop24h 35mFinnair
Deal found 15/7$1,115
목 4/921:45LHR - KUL
1 stop15h 05mEtihad Airways
수 17/909:50KUL - LHR
1 stop15h 55mEtihad Airways
Deal found 15/7$1,117

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 647,157 searches. Data last updated 18 7월 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Heathrow

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

금 5/9

06:55-16:40

1 stop26h 45m

Singapore Changi

화 16/9

23:25-09:55

1 stop17h 30m

$1,012

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

월 15/9

07:00-17:05

2 stops27h 05m

Singapore Changi

수 1/10

23:20-07:55

1 stop15h 35m

$1,026

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

금 5/9

22:05-11:55

1 stop30h 50m

Singapore Changi

토 13/9

03:30-20:00

1 stop23h 30m

$1,033

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

토 9/8

20:35-07:15

1 stop27h 40m

Singapore Changi

목 14/8

20:30-07:30

1 stop18h 00m

$1,043

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

토 13/9

14:45-09:40

1 stop35h 55m

Singapore Changi

수 1/10

21:10-15:15

1 stop25h 05m

$1,050

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

화 9/9

20:50-17:45

1 stop14h 55m

Bangkok Suvarnabhumi

금 26/9

19:10-19:10

1 stop30h 00m

$1,058

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

수 29/10

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

일 2/11

12:10-19:10

1 stop38h 00m

$1,061

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

수 7/1

16:30-16:55

1 stop16h 25m

Singapore Changi

화 24/3

00:05-08:05

1 stop16h 00m

$1,063

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

일 24/8

06:00-09:45

1 stop21h 45m

Bangkok Suvarnabhumi

수 17/9

12:35-07:55

1 stop25h 20m

$1,089

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

일 2/11

21:50-12:30

1 stop30h 40m

Singapore Changi

수 4/3

20:25-14:45

1 stop26h 20m

$1,101

Flights are sorted by cheapest return flights first.

Deals found on 17/7

Showing 1-10 of 60 results
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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, 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 18 7월 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 18 7월 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).

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 18 7월 2025.
See what other customers who have flown with EVA Air, China Airlines, andGaruda Indonesia from London Heathrow Airport to Southeast Asia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Comfort

8.3

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
EVA Air
8.4
Very Good
1,215 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Comfort

8.3

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
China Airlines
8.2
Very Good
745 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Comfort

8.3

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Garuda Indonesia
8.1
Very Good
77 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Comfort

8.3

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Singapore Airlines
8.1
Very Good
1,328 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Comfort

8.3

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

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 Lufthansa, which is currently one of the cheapest options available, starting at $656. Oman Air flights start at $656 while deals on SWISS start at $657 one-way.

  • 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 - Denpasar Bali Ngurah Rai. You may also consider London Heathrow - Kuala Lumpur Intl or London Heathrow - Bangkok Suvarnabhumi.

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

    Consider EVA Air (85%), Thai Airways (82%) or Air Canada (77%) 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 $1,124. While the most popular route (London Heathrow - Denpasar Bali Ngurah Rai) can be booked for $1,239 on average our data indicates $3,598 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

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Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Suvarnabhumi flights
Heathrow to Singapore flights
Gatwick to Suvarnabhumi flights

Top 2 airlines flying from Heathrow to Southeast Asia

Discover the top 2 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 18 7월 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,095Average$1,458FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Thai AirwaysCheapest$1,191Average$1,236FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

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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.

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