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Cheap flights from London Heathrow Airport to Southeast Asia from £262

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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
23 Mar — 30 Mar1
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 21 February 2026.

Wed 11/319:45
LHR
-
HAN
1 stop19h 25m
Hainan Airlines
Sun 22/323:15
HAN
-
LHR
2 stops25h 40m
Hainan Airlines
Deal found 18/2£389
Sun 7/622:40
LHR
-
HAN
1 stop31h 15m
Air China
Mon 22/613:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 20/2£395
Wed 6/520:25
LHR
-
HAN
1 stop33h 30m
Air China
Wed 13/518:15
HAN
-
LHR
2 stops32h 00m
Air China
Deal found 20/2£396
Mon 8/622:40
LHR
-
HAN
1 stop31h 15m
Air China
Mon 22/613:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 20/2£396
Fri 29/522:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 7/613:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 19/2£398
Wed 6/522:40
LHR
-
HAN
1 stop31h 15m
Air China
Wed 17/613:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 19/2£399
Mon 25/522:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 21/613:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 17/2£399
Wed 11/319:45
LHR
-
HAN
1 stop19h 25m
Hainan Airlines
Thu 26/323:15
HAN
-
LHR
2 stops25h 20m
Hainan Airlines
Deal found 19/2£401
Tue 21/421:20
LHR
-
HAN
1 stop38h 25m
China Eastern
Mon 18/502:20
HAN
-
LHR
1 stop22h 20m
China Eastern
Deal found 19/2£402
Tue 19/522:40
LHR
-
HAN
1 stop31h 15m
Air China
Tue 16/613:25
HAN
-
LHR
1 stop34h 15m
Air China
Deal found 21/2£404
Tue 19/522:40
LHR
-
HAN
1 stop31h 15m
Air China
Wed 27/513:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 19/2£405
Sat 12/922:00
LHR
-
BKK
1 stop37h 05m
Air China
Wed 14/1001:30
BKK
-
LHR
1 stop24h 55m
Air China
Deal found 17/2£411

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 21 February 2026.

Round-trip from

£389

One-way from

£262

Popular in

July

Cheapest in

May

Average price

£618
Hainan Airlines
  • Hainan Airlines
  • 11/3-22/3
  • 3 total stops
  • 45h 05m total
  • London to Southeast Asia
Search Deals
Hainan Airlines
  • Hainan Airlines
  • 11/3
  • 1 total stop
  • 19h 25m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£62 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 February 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 21 February 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

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Tue 26/5

21:20-01:20

1 stop22h 00m

Hanoi Noibai

Wed 10/6

02:20-18:40

1 stop22h 20m

£428

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 2/5

21:20-04:05

1 stop24h 45m

Bangkok Suvarnabhumi

Tue 26/5

05:05-18:40

1 stop19h 35m

£430

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 4/3

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Tue 12/5

12:10-20:00

1 stop37h 50m

£431

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 7/3

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Tue 12/5

03:15-20:00

1 stop22h 45m

£431

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 7/3

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Sun 10/5

03:15-19:50

1 stop22h 35m

£431

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 19/5

21:20-22:00

1 stop18h 40m

Phuket City

Mon 1/6

18:55-18:40

2 stops53h 45m

£433

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Sun 10/5

21:20-17:45

1 stop38h 25m

Hanoi Noibai

Tue 26/5

17:30-18:40

3 stops55h 10m

£435

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Mon 11/5

21:20-22:45

1 stop19h 25m

Phuket City

Mon 18/5

18:55-18:40

2 stops29h 45m

£435

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 1/6

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

Sat 20/6

19:30-20:00

1 stop30h 30m

£439

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 13/5

21:20-16:30

2 stops61h 10m

Hanoi Noibai

Sun 17/5

15:00-18:40

1 stop33h 40m

£439

Flights are sorted by cheapest return flights first.

Deals found on 17/2

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 £370). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £534). 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 21 February 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 21 February 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 21 February 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
1,463 reviews
Check prices

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Comfort

8.0

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
1,463 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Comfort

8.0

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
1,174 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Comfort

8.0

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
3,738 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Comfort

8.0

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
1,406 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Comfort

8.0

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
7.2
Good
139 reviews
Singapore Airlines
8.2
Very Good
1,463 reviews
Check prices

Crew

8.6

Boarding

8.3

Food

7.8

Entertainment

8.0

Overall

8.2

Comfort

8.0

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, Shenzhen Airlines, and Air India can get you from London Heathrow Airport to Southeast Asia in just under 22h. Your travel time can differ by up to 3h 35m. The distance between London Heathrow Airport and Southeast Asia is about 5736 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 Thai Airways (86%), EVA Air (84%) and Air Canada (83%).

  • 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 £2,339, our data indicates the cheapest price to be £453. 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 £370). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £534). 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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Gatwick to Kuala Lumpur Intl flights
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Luton to Suvarnabhumi flights
Gatwick to Manila flights
Heathrow to Singapore flights
Heathrow to Hongqiao Intl flights
Heathrow to Denpasar flights
Gatwick to Islamabad flights
Heathrow to Phuket City flights
Stansted to Manila flights
Stansted to Islamabad flights
Heathrow to Lahore flights
Heathrow to Taiwan Taoyuan Intl flights
Gatwick to Colombo flights
Gatwick to Don Mueang Intl flights
London City to Manila flights
Gatwick to Singapore flights
Stansted to Colombo flights
Stansted to New Delhi flights
Heathrow to Hyderabad flights
Heathrow to Hanoi flights
Gatwick to New Delhi flights
Gatwick to Denpasar flights
Heathrow to Gimpo Intl flights
Gatwick to Hong Kong flights
Stansted to Denpasar flights
Heathrow to Kathmandu flights
Heathrow to Pu Dong 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 21 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£282Average£683FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Norse Atlantic UKCheapest£293Average£557FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
China AirlinesCheapest£338Average£711FlexibilityNo cancel feeOn-time70%
Search China Airlines flights
Hainan AirlinesCheapest£351Average£431FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
ITA AirwaysCheapest£364Average£545FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Royal JordanianCheapest£407Average£726FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Royal Brunei AirlinesCheapest£426Average£580FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
FinnairCheapest£448Average£831FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£493Average£792FlexibilityNo cancel feeOn-time75%
Search KLM flights
CondorCheapest£504Average£721FlexibilityNo cancel feeOn-time76%
Search Condor 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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