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Cheap flights from London Heathrow Airport to Southeast Asia from £284

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
15 Jun — 22 Jun1
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 16 May 2026.

Mon 21/922:05
LHR
-
HAN
1 stop29h 35m
Shenzhen Airlines
Sun 4/1018:25
HAN
-
LHR
1 stop31h 25m
Shenzhen Airlines
Deal found 16/5£443
Sat 30/521:20
LHR
-
BKK
1 stop33h 10m
China Eastern
Sun 14/613:35
BKK
-
LHR
1 stop35h 05m
China Eastern
Deal found 12/5£446
Sat 13/622:05
LHR
-
BKK
1 stop22h 10m
Shenzhen Airlines
Sun 5/712:10
BKK
-
LHR
1 stop37h 40m
Shenzhen Airlines
Deal found 12/5£447
Mon 28/922:05
LHR
-
HAN
1 stop29h 35m
Shenzhen Airlines
Sun 11/1002:10
HAN
-
LHR
1 stop23h 40m
Shenzhen Airlines
Deal found 15/5£448
Thu 11/622:10
LHR
-
BKK
1 stop19h 55m
SAUDIA
Thu 2/715:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 14/5£448
Sun 21/622:10
LHR
-
BKK
1 stop19h 55m
SAUDIA
Sun 12/715:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 13/5£449
Wed 23/922:05
LHR
-
HAN
1 stop29h 35m
Shenzhen Airlines
Tue 6/1002:10
HAN
-
LHR
1 stop23h 50m
Shenzhen Airlines
Deal found 13/5£449
Wed 4/1121:10
LHR
-
BKK
1 stop31h 00m
Shenzhen Airlines
Tue 10/1103:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 16/5£449
Thu 11/622:10
LHR
-
BKK
1 stop19h 55m
SAUDIA
Sat 27/615:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 15/5£450
Fri 15/522:00
LHR
-
BKK
2 stops30h 00m
Hainan Airlines
Sun 14/619:20
BKK
-
LHR
2 stops30h 10m
Hainan Airlines
Deal found 12/5£451
Sun 1/1121:10
LHR
-
HAN
1 stop21h 00m
Shenzhen Airlines
Fri 13/1102:10
HAN
-
LHR
1 stop24h 00m
Shenzhen Airlines
Deal found 12/5£452
Tue 9/621:20
LHR
-
BKK
1 stop33h 10m
China Eastern
Mon 15/602:10
BKK
-
LHR
1 stop22h 30m
China Eastern
Deal found 12/5£452

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 16 May 2026.

Round-trip from

£443

One-way from

£284

Popular in

December

Cheapest in

September

Average price

£549
Shenzhen Airlines
  • Shenzhen Airlines
  • 21/9-4/10
  • 2 total stops
  • 61h 00m total
  • London to Southeast Asia
Search Deals
Air China
  • Air China
  • 14/9
  • 1 total stop
  • 19h 30m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£26 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 May 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 16 May 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

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 9/9

22:05-01:10

1 stop21h 05m

Hanoi Noibai

Tue 6/10

18:25-20:00

1 stop31h 35m

£486

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Mon 21/9

21:20-14:40

3 stops58h 20m

Kuala Lumpur Intl

Wed 14/10

04:05-18:40

2 stops45h 35m

£546

LondonJakarta

LHR - CGK

LHRCGK

London Heathrow

Thu 18/6

14:45-20:35

1 stop23h 50m

Jakarta Soekarno-Hatta Intl

Fri 3/7

00:45-07:00

1 stop36h 15m

£550

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 10/9

20:50-09:40

1 stop29h 50m

Singapore Changi

Tue 22/9

21:00-18:45

1 stop28h 45m

£552

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 13/9

09:30-09:40

1 stop17h 10m

Singapore Changi

Thu 17/9

21:00-18:45

1 stop28h 45m

£552

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 20/6

14:45-11:50

1 stop15h 05m

Bangkok Suvarnabhumi

Thu 23/7

03:15-12:45

1 stop15h 30m

£552

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Thu 5/11

21:00-14:45

3 stops33h 45m

Kuala Lumpur Intl

Thu 12/11

02:05-17:30

2 stops23h 25m

£555

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Mon 6/7

21:45-12:05

1 stop32h 20m

Phuket City

Sat 18/7

02:25-12:45

1 stop16h 20m

£561

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Thu 11/6

21:20-14:00

1 stop34h 40m

Hanoi Noibai

Wed 17/6

18:45-18:40

1 stop29h 55m

£608

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 30/5

22:05-02:15

1 stop22h 10m

Bangkok Suvarnabhumi

Thu 25/6

03:15-20:00

1 stop22h 45m

£650

Flights are sorted by cheapest return flights first.

Deals found on 13/5

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

How far ahead should I book a flight from London Heathrow Airport to Southeast Asia?

The price you pay for your flight from London Heathrow Airport to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 £621). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,023). 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 16 May 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 16 May 2026.

The most flights from LHR to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 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 16 May 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
1,517 reviews
Check prices

Overall

8.2

Crew

8.6

Comfort

8.0

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Singapore Airlines
8.2
Very Good
1,517 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Crew

8.6

Comfort

8.0

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Cathay Pacific
7.6
Good
1,331 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Crew

8.6

Comfort

8.0

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Qatar Airways
7.4
Good
3,725 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Crew

8.6

Comfort

8.0

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Etihad Airways
7.3
Good
1,439 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Crew

8.6

Comfort

8.0

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Air China
7.3
Good
149 reviews
Singapore Airlines
8.2
Very Good
1,517 reviews
Check prices

Overall

8.2

Crew

8.6

Comfort

8.0

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.

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?

    Shenzhen Airlines, China Eastern, and Etihad Airways can get you from London Heathrow Airport to Southeast Asia in just under 21h 05m. Your travel time can differ by up to 37h 15m. 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 £184. 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 - Bangkok Don Mueang 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 (78%), Air Canada (75%) and EVA Air (73%).

  • 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 £999, our data indicates the cheapest price to be £508. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £406.

  • 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 £621). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,023). 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 Haneda flights
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Heathrow to Taiwan Taoyuan Intl flights
Gatwick to Don Mueang Intl flights
Gatwick to Kuala Lumpur Intl flights
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Heathrow to Singapore flights
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London City to Haneda flights
Gatwick to New Delhi flights
Stansted to Islamabad flights
Stansted to Kuala Lumpur Intl flights
Stansted to New Delhi flights
Gatwick to Singapore flights
Gatwick to Taiwan Taoyuan Intl flights
Gatwick to Manila flights
Gatwick to Hongqiao Intl flights
Gatwick to Denpasar flights
London City to Kuala Lumpur Intl flights
Stansted to Denpasar flights
Stansted to Manila flights
London City to Denpasar flights
Gatwick to Hong Kong flights
Heathrow to Bangalore flights
Stansted to Colombo flights
Heathrow to Lahore flights
Heathrow to Hyderabad flights
Gatwick to Colombo flights
Heathrow to Chennai flights
London City to Hong Kong flights
London City to Manila 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 16 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£216Average£569FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Scandinavian AirlinesCheapest£285Average£644FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Hainan AirlinesCheapest£355Average£427FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
ITA AirwaysCheapest£368Average£551FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Royal JordanianCheapest£411Average£713FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Royal Brunei AirlinesCheapest£445Average£606FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
CondorCheapest£454Average£727FlexibilityNo cancel feeOn-time76%
Search Condor flights
FinnairCheapest£459Average£843FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£498Average£843FlexibilityNo cancel feeOn-time75%
Search KLM flights
IndiGoCheapest£510Average£641FlexibilityNo 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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