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Cheap flights from London Heathrow Airport to Southeast Asia from £273

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
22 May — 29 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 22 April 2026.

Mon 7/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Mon 12/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 20/4£402
Mon 21/920:25
LHR
-
HAN
1 stop33h 30m
Air China
Mon 12/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 21/4£417
Sun 20/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 11/1013:25
HAN
-
LHR
1 stop34h 15m
Air China
Deal found 20/4£420
Tue 8/920:25
LHR
-
HAN
1 stop33h 30m
Air China
Fri 9/1013:25
HAN
-
LHR
1 stop34h 15m
Air China
Deal found 19/4£426
Mon 23/1121:10
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Thu 10/1212:10
BKK
-
LHR
1 stop38h 00m
Shenzhen Airlines
Deal found 17/4£434
Sat 6/610:00
LHR
-
BKK
1 stop21h 45m
SAUDIA
Thu 25/615:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 20/4£435
Tue 28/422:10
LHR
-
BKK
1 stop19h 55m
SAUDIA
Tue 5/515:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 22/4£436
Mon 7/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 11/1013:25
HAN
-
LHR
1 stop34h 15m
Air China
Deal found 20/4£437
Sat 30/510:00
LHR
-
BKK
1 stop21h 45m
SAUDIA
Sun 14/615:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 22/4£437
Tue 8/920:25
LHR
-
HAN
1 stop33h 30m
Air China
Thu 15/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 17/4£437
Thu 23/422:10
LHR
-
BKK
1 stop19h 55m
SAUDIA
Sun 21/615:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 22/4£437
Sat 23/516:15
LHR
-
BKK
1 stop15h 30m
SAUDIA
Thu 28/515:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 18/4£438

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 22 April 2026.

Round-trip from

£402

One-way from

£273

Popular in

December

Cheapest in

May

Average price

£608
Air China
  • Air China
  • 7/9-12/10
  • 2 total stops
  • 68h 15m total
  • London to Southeast Asia
Search Deals
Shenzhen Airlines
  • Shenzhen Airlines
  • 27/4
  • 1 total stop
  • 29h 35m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£25 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£14 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 858,174 searches. Data last updated 22 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

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 13/9

21:20-22:45

1 stop19h 25m

Phuket City

Tue 13/10

18:55-18:40

2 stops29h 45m

£536

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 14/6

10:00-12:45

1 stop19h 45m

Singapore Changi

Wed 17/6

20:00-06:55

1 stop17h 55m

£558

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

£582

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 11/9

22:05-12:45

1 stop31h 40m

Singapore Changi

Thu 17/9

20:00-06:55

1 stop17h 55m

£582

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 10/9

21:45-23:40

1 stop19h 55m

Phuket City

Thu 24/9

15:45-07:00

1 stop21h 15m

£605

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 10/7

09:30-11:50

1 stop20h 20m

Bangkok Suvarnabhumi

Thu 16/7

03:15-12:45

1 stop15h 30m

£614

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Tue 30/6

21:45-06:40

1 stop26h 55m

Hanoi Noibai

Sat 11/7

20:40-12:45

1 stop22h 05m

£621

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Wed 14/10

22:05-01:50

1 stop21h 45m

Ho Chi Minh City

Fri 27/11

02:50-19:10

1 stop23h 20m

£627

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

£631

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 12/5

21:20-18:00

2 stops38h 40m

Phuket City

Tue 19/5

18:55-18:40

3 stops53h 45m

£647

Flights are sorted by cheapest return flights first.

Deals found on 21/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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.

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 £612). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £998). 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 22 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 22 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).

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 22 April 2026.
Check out reviews from past customers who have flown with Singapore Airlines,Cathay Pacific, andQatar Airways from London Heathrow Airport to Southeast Asia to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,502 reviews
Check prices

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Singapore Airlines
8.2
Very Good
1,502 reviews
Singapore Airlines
8.2
Very Good
1,502 reviews
Check prices

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Cathay Pacific
7.6
Good
1,284 reviews
Singapore Airlines
8.2
Very Good
1,502 reviews
Check prices

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Qatar Airways
7.4
Good
3,730 reviews
Singapore Airlines
8.2
Very Good
1,502 reviews
Check prices

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Etihad Airways
7.3
Good
1,433 reviews
Singapore Airlines
8.2
Very Good
1,502 reviews
Check prices

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Air China
7.3
Good
148 reviews
Singapore Airlines
8.2
Very Good
1,502 reviews
Check prices

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

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?

    China Eastern, Gulf Air, and Etihad Airways can get you from London Heathrow Airport to Southeast Asia in just under 19h 25m. Your travel time can differ by up to 30m. The distance between London Heathrow Airport and Southeast Asia is about 6149 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    The cheapest airline one-way is Shenzhen Airlines, with whom users have recently found tickets for as low as £181. However, be on the lookout for offers from Air China and SAUDIA, as they are both options that can get you from London Heathrow Airport to Southeast Asia for a low price.

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

    While some choose either London Heathrow - Kuala Lumpur Intl or London Heathrow - Singapore Changi, London Heathrow - Bangkok Suvarnabhumi is the most popular route from London Heathrow Airport to Southeast Asia.

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

    The top 3 most reliable airlines when flying from London Heathrow Airport to Southeast Asia are Thai Airways (77%), Air Canada (74%) and EVA Air (71%).

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

    Looking for the cheapest flight from London Heathrow Airport to Southeast Asia? While on average our users pay £1,012, our data indicates the cheapest price to be £447. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £393.

  • 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 £612). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £998). 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.
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Heathrow to Manila flights
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Gatwick to Singapore flights
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Gatwick to Denpasar flights
Stansted to Denpasar flights
London City to Kuala Lumpur Intl flights
London City to Denpasar flights
Gatwick to New Delhi flights
Heathrow to Pu Dong flights
Heathrow to Bangalore flights
Stansted to New Delhi flights
Luton to Narita flights
Gatwick to Manila flights
Gatwick to Pu Dong flights
Stansted to Manila flights
Gatwick to Islamabad flights
London City to Manila flights
Heathrow to Lahore flights
Stansted to Islamabad flights
Gatwick to Mumbai flights
Gatwick to Hong Kong flights
Stansted to Mumbai flights
Stansted to Hong Kong flights

Top 10 airlines flying from Heathrow to Southeast Asia

Discover the top 10 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 858,174 searches. Data last updated 22 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£213Average£561FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Scandinavian AirlinesCheapest£281Average£635FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Hainan AirlinesCheapest£360Average£412FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
ITA AirwaysCheapest£363Average£530FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Royal JordanianCheapest£406Average£720FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Royal Brunei AirlinesCheapest£439Average£598FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
CondorCheapest£447Average£718FlexibilityNo cancel feeOn-time76%
Search Condor flights
FinnairCheapest£451Average£830FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£492Average£781FlexibilityNo cancel feeOn-time75%
Search KLM flights
IndiGoCheapest£503Average£633FlexibilityNo cancel feeOn-time80%
Search IndiGo 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?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Southeast Asia from Heathrow.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Southeast Asia, users can toggle the no change fees filter when performing a flight search.

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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