Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Southeast Asia from £285

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
18 6月 — 25 6月1
1 adult

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 13 6月 2025.

Round-trip from

£417

One-way from

£285

Popular in

December

Cheapest in

May

Average price

£563
Shenzhen Airlines
  • Shenzhen Airlines
  • 31/8-7/9
  • 2 total stops
  • 53h 40m total
  • London to Southeast Asia
Search Deals
Hainan Airlines
  • Hainan Airlines
  • 20/6
  • 2 total stops
  • 38h 15m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£42 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Heathrow to Southeast Asia

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 13 6月 2025.

週日 31/822:05LHR - BKK
1 stop31h 05mShenzhen Airlines
週日 7/903:15BKK - LHR
1 stop22h 35mShenzhen Airlines
Deal found 11/6£417
週三 25/622:10LHR - BKK
1 stop31h 30mChina Southern
週三 2/713:45BKK - LHR
1 stop35h 15mChina Southern
Deal found 12/6£421
週三 25/622:00LHR - BKK
1 stop20h 20mHainan Airlines
週二 5/801:30BKK - LHR
1 stop24h 00mHainan Airlines
Deal found 11/6£422
週四 12/622:40LHR - BKK
1 stop19h 30mAir China
週四 26/619:35BKK - LHR
1 stop30h 55mAir China
Deal found 11/6£428
週一 1/921:20LHR - BKK
1 stop21h 20mChina Eastern
週六 29/1101:55BKK - LHR
1 stop22h 35mChina Eastern
Deal found 12/6£434
週六 22/1120:25LHR - HAN
1 stop32h 30mAir China
週三 10/1213:25HAN - LHR
1 stop35h 25mAir China
Deal found 11/6£451
週五 31/1021:10LHR - HAN
1 stop20h 50mShenzhen Airlines
週五 14/1102:00HAN - LHR
1 stop24h 10mShenzhen Airlines
Deal found 11/6£452
週一 23/621:20LHR - HAN
2 stops28h 55mChina Eastern
週一 7/717:30HAN - LHR
2 stops31h 10mChina Eastern
Deal found 11/6£453
週日 22/621:20LHR - SIN
3 stops45h 10mChina Eastern
週三 25/600:55SIN - LHR
1 stop24h 45mChina Eastern
Deal found 11/6£456
週三 25/610:00LHR - SIN
1 stop19h 20mGulf Air
週六 28/620:00SIN - LHR
1 stop17h 55mGulf Air
Deal found 11/6£456
週四 2/1022:10LHR - HAN
2 stops38h 45mChina Southern
週日 12/1015:45HAN - LHR
1 stop33h 15mChina Southern
Deal found 11/6£457
週一 16/622:00LHR - SIN
1 stop30h 00mHainan Airlines
週四 10/712:05SIN - LHR
1 stop38h 25mHainan Airlines
Deal found 12/6£457

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 13 6月 2025.
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

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

週日 31/8

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

週日 7/9

03:15-19:50

1 stop22h 35m

£417

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

週三 25/6

22:10-11:40

1 stop31h 30m

Bangkok Suvarnabhumi

週三 2/7

13:45-19:00

1 stop35h 15m

£421

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

週三 25/6

22:00-00:20

1 stop20h 20m

Bangkok Suvarnabhumi

週二 5/8

01:30-19:30

1 stop24h 00m

£422

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

週一 1/9

21:20-00:40

1 stop21h 20m

Bangkok Suvarnabhumi

週六 29/11

01:55-17:30

1 stop22h 35m

£434

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

週三 5/11

17:40-18:05

1 stop17h 25m

Bangkok Suvarnabhumi

週三 10/12

19:30-15:55

1 stop27h 25m

£446

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

週六 22/11

20:25-11:55

1 stop32h 30m

Hanoi Noibai

週三 10/12

13:25-17:50

1 stop35h 25m

£451

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

週五 31/10

21:10-01:00

1 stop20h 50m

Hanoi Noibai

週五 14/11

02:00-19:10

1 stop24h 10m

£452

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

週一 23/6

21:20-08:15

2 stops28h 55m

Hanoi Noibai

週一 7/7

17:30-18:40

2 stops31h 10m

£453

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

週三 25/6

10:00-12:20

1 stop19h 20m

Singapore Changi

週六 28/6

20:00-06:55

1 stop17h 55m

£456

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

週四 2/10

22:10-18:55

2 stops38h 45m

Hanoi Noibai

週日 12/10

15:45-19:00

1 stop33h 15m

£457

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 60 results
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

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £718). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,123). 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 13 6月 2025.

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 13 6月 2025.

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).

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Southeast Asia ranges from 10.0 - 320.0 inches per month. September is typically the wettest month, when rainfall can reach 320.0 mm. January is typically the driest time to visit Southeast Asia when rainfall is around 10.0 mm.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.0 C).

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 13 6月 2025.
Get a feel of what it's like to fly with Hainan Airlines, Singapore Airlines and Emirates from London to Southeast Asia by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Hainan Airlines
8.1
Very Good
39 reviews
Check prices

Overall

8.1

Entertainment

7.7

Food

8.5

Boarding

8.6

Comfort

8.1

Crew

8.9

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Hainan Airlines
8.1
Very Good
39 reviews
Hainan Airlines
8.1
Very Good
39 reviews
Check prices

Overall

8.1

Entertainment

7.7

Food

8.5

Boarding

8.6

Comfort

8.1

Crew

8.9

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Singapore Airlines
8.1
Very Good
1,304 reviews
Hainan Airlines
8.1
Very Good
39 reviews
Check prices

Overall

8.1

Entertainment

7.7

Food

8.5

Boarding

8.6

Comfort

8.1

Crew

8.9

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Emirates
8.1
Very Good
3,265 reviews
Hainan Airlines
8.1
Very Good
39 reviews
Check prices

Overall

8.1

Entertainment

7.7

Food

8.5

Boarding

8.6

Comfort

8.1

Crew

8.9

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
KLM
7.8
Good
1,358 reviews
Hainan Airlines
8.1
Very Good
39 reviews
Check prices

Overall

8.1

Entertainment

7.7

Food

8.5

Boarding

8.6

Comfort

8.1

Crew

8.9

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.

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.

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

    The cheapest airline one-way is Hainan Airlines, with whom users have recently found tickets for as low as £285. However, be on the lookout for offers from Air China and China Southern, 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 (62%), EVA Air (59%) and Air Canada (57%).

  • 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 £2,830, our data indicates the cheapest price to be £349. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £341.

  • 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of £718). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of £1,123). 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
Heathrow to Haneda flights
Gatwick to Suvarnabhumi flights
London City to Suvarnabhumi flights
Stansted to Suvarnabhumi flights
Heathrow to Narita flights
Heathrow to Kuala Lumpur Intl flights
Heathrow to New Delhi flights
Heathrow to Hong Kong flights
Heathrow to Colombo flights
Gatwick to Narita flights
Heathrow to Mumbai flights
Gatwick to Haneda flights
London City to Haneda flights
Heathrow to Manila flights
Stansted to Narita flights
Heathrow to Singapore flights
London City to Narita flights
Heathrow to Incheon Intl flights
Gatwick to Singapore flights
Gatwick to Manila flights
Heathrow to Denpasar flights
Heathrow to Taiwan Taoyuan Intl flights
Luton to Suvarnabhumi flights
Stansted to Manila flights
Heathrow to Hyderabad flights
Heathrow to Bangalore flights
London City to Manila flights
Gatwick to Kuala Lumpur Intl flights
Gatwick to New Delhi flights
Gatwick to Denpasar flights
Stansted to New Delhi flights
Heathrow to Islamabad flights
Gatwick to Colombo flights
Heathrow to Hongqiao Intl flights
Stansted to Colombo flights
London City to Denpasar flights
London City to Kuala Lumpur Intl flights
Stansted to Denpasar flights
Stansted to Mumbai flights
Heathrow to Gimpo Intl flights
Heathrow to Kathmandu flights
Stansted to Kuala Lumpur Intl flights
Heathrow to Lahore flights
Gatwick to Hong Kong flights
Heathrow to Phuket City flights
Gatwick to Mumbai flights
Gatwick to Taiwan Taoyuan Intl flights
Heathrow to Ahmedabad flights
Heathrow to Ho Chi Minh City 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 13 6月 2025.
AirlineCheapestAverageFlexibilityOn-time
Hainan AirlinesCheapest£373Average£416FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
KLMCheapest£412Average£841FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£412Average£629FlexibilityNo cancel feeOn-time77%
Search Air France flights
Royal Brunei AirlinesCheapest£422Average£571FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
FinnairCheapest£453Average£818FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£480Average£735FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Norse Atlantic UKCheapest£480Average£559FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
SWISSCheapest£481Average£704FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Royal JordanianCheapest£513Average£695FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Austrian AirlinesCheapest£523Average£881FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines 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.
Site
©2025 Cheapflights