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Cheap flights from London Heathrow Airport to Southeast Asia from £252

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 14/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
7 feb — 14 feb1
1 adult
1 adult, Economy, 0 bags

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 8 gennaio 2026.

Round-trip from

£381

One-way from

£252

Popular in

July

Cheapest in

May

Average price

£609
Hainan Airlines
  • Hainan Airlines
  • 4/3-24/3
  • 2 total stops
  • 43h 30m total
  • London to Southeast Asia
Search Deals
Hainan Airlines
  • Hainan Airlines
  • 14/1
  • 1 total stop
  • 29h 10m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 8 gennaio 2026.

mer 4/319:45LHR - HAN
1 stop19h 25mHainan Airlines
mar 24/323:15HAN - LHR
1 stop24h 05mHainan Airlines
Deal found 6/1£381
mer 4/319:45LHR - HAN
1 stop19h 25mHainan Airlines
dom 22/323:15HAN - LHR
2 stops25h 40mHainan Airlines
Deal found 6/1£388
ven 6/321:00LHR - HAN
2 stops42h 10mHainan Airlines
dom 22/323:15HAN - LHR
2 stops25h 40mHainan Airlines
Deal found 7/1£389
gio 22/121:00LHR - HAN
1 stop21h 45mChina Eastern
mer 4/204:20HAN - LHR
1 stop20h 10mChina Eastern
Deal found 6/1£390
gio 22/121:00LHR - HAN
1 stop21h 45mChina Eastern
mar 3/202:45HAN - LHR
1 stop21h 45mChina Eastern
Deal found 7/1£391
mar 10/321:00LHR - HAN
2 stops34h 45mChina Eastern
lun 30/302:20HAN - LHR
1 stop22h 20mChina Eastern
Deal found 7/1£394
mer 14/121:00LHR - HAN
1 stop37h 45mChina Eastern
mar 27/102:35HAN - LHR
2 stops21h 55mChina Eastern
Deal found 6/1£395
mer 21/121:00LHR - HAN
1 stop21h 45mChina Eastern
mar 27/102:35HAN - LHR
2 stops21h 55mChina Eastern
Deal found 7/1£397
mar 3/221:00LHR - HAN
1 stop23h 20mChina Eastern
lun 2/302:45HAN - LHR
1 stop21h 45mChina Eastern
Deal found 6/1£397
mar 3/221:00LHR - HAN
2 stops34h 45mChina Eastern
lun 9/202:45HAN - LHR
1 stop21h 45mChina Eastern
Deal found 6/1£398
ven 24/422:00LHR - BKK
2 stops30h 00mHainan Airlines
gio 7/519:20BKK - LHR
2 stops30h 10mHainan Airlines
Deal found 7/1£402
mer 4/219:45LHR - BKK
1 stop31h 20mHainan Airlines
mar 17/211:10BKK - LHR
1 stop36h 10mHainan Airlines
Deal found 7/1£403

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 8 gennaio 2026.
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

mer 4/2

14:45-16:55

1 stop18h 10m

Singapore Changi

dom 15/2

10:55-21:25

1 stop18h 30m

£476

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

mer 4/3

19:20-23:25

1 stop21h 05m

Bangkok Suvarnabhumi

lun 4/5

15:05-07:00

1 stop21h 55m

£478

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

dom 18/1

13:55-23:25

1 stop26h 30m

Bangkok Suvarnabhumi

gio 29/1

02:55-14:30

1 stop18h 35m

£480

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

gio 22/1

20:55-23:25

1 stop19h 30m

Bangkok Suvarnabhumi

gio 29/1

02:55-14:30

1 stop18h 35m

£480

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

dom 26/4

21:45-11:50

1 stop32h 05m

Bangkok Suvarnabhumi

lun 25/5

15:05-15:05

1 stop30h 00m

£491

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

dom 1/3

20:05-06:45

1 stop27h 40m

Bangkok Suvarnabhumi

gio 12/3

20:05-05:55

1 stop16h 50m

£512

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

ven 6/2

21:50-12:30

1 stop30h 40m

Singapore Changi

mar 10/2

20:00-06:35

1 stop18h 35m

£522

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

mar 2/6

10:00-12:20

1 stop19h 20m

Singapore Changi

ven 12/6

20:00-15:20

1 stop26h 20m

£528

LondonManila

LHR - MNL

LHRMNL

London Heathrow

dom 3/5

22:05-01:40

1 stop20h 35m

Manila Ninoy Aquino Intl

sab 16/5

02:55-20:00

1 stop24h 05m

£532

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

dom 1/3

22:05-00:35

1 stop18h 30m

Kuala Lumpur Intl

dom 15/3

02:15-12:15

1 stop18h 00m

£536

Flights are sorted by cheapest return flights first.

Deals found on 7/1

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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £369). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £541). 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 8 gennaio 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 8 gennaio 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 8 gennaio 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
8.1
Very Good
1,427 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.1

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Singapore Airlines
8.1
Very Good
1,427 reviews
Singapore Airlines
8.1
Very Good
1,427 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.1

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Cathay Pacific
7.6
Good
1,124 reviews
Singapore Airlines
8.1
Very Good
1,427 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.1

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Qatar Airways
7.4
Good
3,701 reviews
Singapore Airlines
8.1
Very Good
1,427 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.1

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Etihad Airways
7.3
Good
1,360 reviews
Singapore Airlines
8.1
Very Good
1,427 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.1

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Air China
7.2
Good
136 reviews
Singapore Airlines
8.1
Very Good
1,427 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.1

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

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?

    Air France, Etihad Airways, and Gulf Air can get you from London Heathrow Airport to Southeast Asia in just under 18h 10m. Your travel time can differ by up to 12h 30m. The distance between London Heathrow Airport and Southeast Asia is about 6757 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 - Manila Ninoy Aquino Intl, 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 EVA Air (83%), Thai Airways (80%) and Air Canada (76%).

  • 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 £2,280, our data indicates the cheapest price to be £480. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £368.

  • 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 £369). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £541). 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
Gatwick to Suvarnabhumi flights
Heathrow to Haneda flights
London City to Suvarnabhumi flights
Stansted to Suvarnabhumi flights
Heathrow to Narita flights
Gatwick to Narita flights
Heathrow to Colombo flights
Heathrow to Kuala Lumpur Intl flights
Gatwick to Haneda flights
Heathrow to Hong Kong flights
Stansted to Narita flights
Heathrow to New Delhi flights
London City to Narita flights
Heathrow to Manila flights
London City to Haneda flights
Luton to Suvarnabhumi flights
Heathrow to Mumbai flights
Heathrow to Don Mueang Intl flights
Stansted to Haneda flights
Heathrow to Incheon Intl flights
Heathrow to Singapore flights
Heathrow to Islamabad flights
Gatwick to Manila flights
Stansted to Colombo flights
Stansted to Manila flights
Gatwick to Colombo flights
Stansted to New Delhi flights
Gatwick to New Delhi flights
Heathrow to Lahore flights
Gatwick to Kuala Lumpur Intl flights
Stansted to Kuala Lumpur Intl flights
London City to Manila flights
Heathrow to Hanoi flights
Gatwick to Singapore flights
Heathrow to Phuket City flights
Heathrow to Hongqiao Intl flights
London City to Kuala Lumpur Intl flights
Gatwick to Hong Kong flights
Heathrow to Denpasar flights
Gatwick to Islamabad flights
Stansted to Hong Kong flights
Luton to Narita flights
London City to Hong Kong flights
London City to Colombo flights
Stansted to Islamabad flights
Gatwick to Phuket City flights
Gatwick to Hanoi flights
Heathrow to Gimpo Intl flights
Heathrow to Malé 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 8 gennaio 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£347Average£554FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Hainan AirlinesCheapest£361Average£435FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
KLMCheapest£415Average£791FlexibilityNo cancel feeOn-time75%
Search KLM flights
SWISSCheapest£422Average£689FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Royal Brunei AirlinesCheapest£425Average£568FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
LufthansaCheapest£426Average£630FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£438Average£758FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
FinnairCheapest£450Average£783FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Royal JordanianCheapest£470Average£720FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
IndiGoCheapest£509Average£705FlexibilityNo 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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