Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Southeast Asia from £271

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
1 Jun — 8 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 2 May 2026.

Mon 7/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Thu 22/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 30/4£399
Sun 13/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 18/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 30/4£404
Sun 13/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 11/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 1/5£405
Mon 14/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Thu 3/1213:20
HAN
-
LHR
1 stop33h 35m
Air China
Deal found 1/5£407
Sun 20/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Sun 11/1013:25
HAN
-
LHR
1 stop34h 15m
Air China
Deal found 28/4£412
Mon 8/616:15
LHR
-
BKK
1 stop15h 30m
SAUDIA
Sat 27/615:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 27/4£430
Mon 2/1121:10
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Sun 22/1103:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 27/4£431
Sun 1/1121:10
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Thu 26/1112:10
BKK
-
LHR
1 stop38h 00m
Shenzhen Airlines
Deal found 28/4£432
Sat 6/616:15
LHR
-
BKK
1 stop15h 30m
SAUDIA
Thu 25/615:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 29/4£432
Mon 4/510:00
LHR
-
BKK
1 stop21h 45m
SAUDIA
Tue 26/515:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 29/4£433
Thu 7/522:10
LHR
-
BKK
1 stop19h 55m
SAUDIA
Sun 24/515:25
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 28/4£434
Thu 17/922:40
LHR
-
HAN
1 stop31h 15m
Air China
Tue 13/1013:25
HAN
-
LHR
1 stop37h 00m
Air China
Deal found 28/4£434

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 2 May 2026.

Round-trip from

£399

One-way from

£271

Popular in

December

Cheapest in

May

Average price

£518
Air China
  • Air China
  • 7/9-22/10
  • 2 total stops
  • 68h 15m total
  • London to Southeast Asia
Search Deals
Shenzhen Airlines
  • Shenzhen Airlines
  • 6/6
  • 1 total stop
  • 29h 35m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£24 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 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 2 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

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 17/6

16:15-13:45

1 stop15h 30m

Bangkok Suvarnabhumi

Tue 30/6

15:25-07:30

1 stop22h 05m

£497

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sat 30/5

14:45-18:20

1 stop21h 35m

Phuket City

Mon 29/6

15:45-07:00

1 stop21h 15m

£549

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Fri 26/6

14:45-12:05

1 stop15h 20m

Phuket City

Sun 26/7

02:25-15:05

1 stop18h 40m

£553

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Fri 26/6

14:45-12:05

1 stop15h 20m

Phuket City

Mon 20/7

02:25-15:05

1 stop18h 40m

£553

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 16/6

14:45-12:05

1 stop15h 20m

Phuket City

Fri 10/7

02:25-15:05

1 stop18h 40m

£553

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 31/5

14:45-23:55

1 stop27h 10m

Phuket City

Sun 5/7

02:25-15:05

1 stop18h 40m

£555

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 2/10

22:05-02:00

1 stop20h 55m

Singapore Changi

Sun 25/10

18:30-19:10

1 stop32h 40m

£567

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 4/6

21:20-12:20

3 stops33h 00m

Bangkok Suvarnabhumi

Tue 9/6

05:05-18:40

1 stop19h 35m

£572

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 3/6

21:20-21:55

1 stop18h 35m

Bangkok Suvarnabhumi

Wed 10/6

15:55-18:40

2 stops32h 45m

£576

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Mon 1/6

21:20-14:40

2 stops58h 20m

Kuala Lumpur Intl

Mon 8/6

15:40-18:40

3 stops34h 00m

£594

Flights are sorted by cheapest return flights first.

Deals found on 1/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 45 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 £608). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £992). 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 2 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 2 May 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 2 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
1,505 reviews
Check prices

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Singapore Airlines
8.2
Very Good
1,505 reviews
Singapore Airlines
8.2
Very Good
1,505 reviews
Check prices

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Cathay Pacific
7.6
Good
1,311 reviews
Singapore Airlines
8.2
Very Good
1,505 reviews
Check prices

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Qatar Airways
7.4
Good
3,724 reviews
Singapore Airlines
8.2
Very Good
1,505 reviews
Check prices

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Etihad Airways
7.3
Good
1,432 reviews
Singapore Airlines
8.2
Very Good
1,505 reviews
Check prices

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.
Air China
7.3
Good
148 reviews
Singapore Airlines
8.2
Very Good
1,505 reviews
Check prices

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2026

SAI - SIN

The only issue we had was seat selection. Was not easy to change, after they assigned seats. Also, the premium economy seats, are nothing special.. All and all safe flight with minor back issues.

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?

    SAUDIA, Etihad Airways, and Shenzhen Airlines can get you from London Heathrow Airport to Southeast Asia in just under 15h 30m. Your travel time can differ by up to 6h 05m. The distance between London Heathrow Airport and Southeast Asia is about 5947 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 £180. 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 £1,010, our data indicates the cheapest price to be £495. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £374.

  • 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 £608). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £992). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Stansted to Suvarnabhumi flights
Heathrow to Haneda flights
London City to Suvarnabhumi flights
Heathrow to Kuala Lumpur Intl flights
Heathrow to Narita flights
Heathrow to New Delhi flights
Heathrow to Don Mueang Intl flights
Gatwick to Haneda flights
Gatwick to Narita flights
Heathrow to Colombo flights
Stansted to Narita flights
Heathrow to Hong Kong flights
Stansted to Haneda flights
Heathrow to Mumbai flights
London City to Narita flights
Luton to Suvarnabhumi flights
Gatwick to Don Mueang Intl flights
Heathrow to Manila flights
Heathrow to Incheon Intl flights
Gatwick to Kuala Lumpur Intl flights
London City to Haneda flights
Heathrow to Singapore flights
Heathrow to Islamabad flights
Heathrow to Hongqiao Intl flights
Heathrow to Denpasar flights
Gatwick to Manila flights
Stansted to Kuala Lumpur Intl flights
Stansted to Manila flights
Stansted to New Delhi flights
Gatwick to New Delhi flights
Gatwick to Singapore flights
London City to Kuala Lumpur Intl flights
London City to Manila flights
Gatwick to Denpasar flights
Heathrow to Chennai flights
Stansted to Denpasar flights
Heathrow to Lahore flights
London City to Denpasar flights
Heathrow to Bangalore flights
Heathrow to Pu Dong flights
Gatwick to Colombo flights
Heathrow to Dhaka flights
Stansted to Islamabad flights
Luton to Narita flights
Gatwick to Hong Kong flights
Heathrow to Hanoi flights
Heathrow to Hyderabad 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 2 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£212Average£559FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Scandinavian AirlinesCheapest£280Average£631FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Hainan AirlinesCheapest£358Average£415FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
ITA AirwaysCheapest£361Average£526FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Royal JordanianCheapest£403Average£703FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Royal Brunei AirlinesCheapest£436Average£592FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
CondorCheapest£444Average£713FlexibilityNo cancel feeOn-time76%
Search Condor flights
FinnairCheapest£449Average£824FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£488Average£815FlexibilityNo cancel feeOn-time75%
Search KLM flights
IndiGoCheapest£499Average£628FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.