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Cheap flights from London Heathrow Airport to Southeast Asia from £273

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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
4 May — 11 May1
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 4 April 2026.

Sat 13/621:45
LHR
-
HAN
1 stop15h 00m
Etihad Airways
Sat 27/608:25
HAN
-
LHR
1 stop16h 20m
Etihad Airways
Deal found 4/4£377
Fri 24/421:10
LHR
-
HAN
1 stop15h 35m
Etihad Airways
Sun 10/520:40
HAN
-
LHR
1 stop22h 05m
Etihad Airways
Deal found 3/4£377
Fri 10/409:15
LHR
-
HAN
1 stop15h 25m
Etihad Airways
Sat 9/508:25
HAN
-
LHR
1 stop16h 20m
Etihad Airways
Deal found 3/4£379
Sat 2/509:30
LHR
-
HAN
1 stop27h 15m
Etihad Airways
Sat 9/508:25
HAN
-
LHR
1 stop28h 35m
Etihad Airways
Deal found 3/4£380
Sat 11/421:10
LHR
-
HAN
1 stop27h 30m
Etihad Airways
Sat 25/420:40
HAN
-
LHR
1 stop22h 50m
Etihad Airways
Deal found 3/4£387
Fri 3/409:15
LHR
-
HAN
1 stop15h 25m
Etihad Airways
Sat 18/420:40
HAN
-
LHR
1 stop16h 45m
Etihad Airways
Deal found 2/4£390
Fri 10/409:15
LHR
-
HAN
1 stop15h 25m
Etihad Airways
Sat 25/408:25
HAN
-
LHR
1 stop16h 55m
Etihad Airways
Deal found 31/3£393
Sat 4/421:10
LHR
-
HAN
1 stop27h 30m
Etihad Airways
Sat 2/508:25
HAN
-
LHR
1 stop16h 20m
Etihad Airways
Deal found 31/3£396
Fri 15/509:30
LHR
-
HAN
1 stop15h 10m
Etihad Airways
Sat 25/720:40
HAN
-
LHR
1 stop16h 20m
Etihad Airways
Deal found 31/3£399
Sat 4/421:10
LHR
-
HAN
1 stop27h 30m
Etihad Airways
Sat 18/420:40
HAN
-
LHR
1 stop28h 40m
Etihad Airways
Deal found 1/4£400
Fri 15/509:30
LHR
-
HAN
1 stop15h 10m
Etihad Airways
Sat 30/508:25
HAN
-
LHR
1 stop28h 35m
Etihad Airways
Deal found 2/4£403
Sat 18/414:50
LHR
-
HAN
1 stop33h 50m
Etihad Airways
Sat 2/508:25
HAN
-
LHR
1 stop28h 35m
Etihad Airways
Deal found 1/4£407

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 4 April 2026.

Round-trip from

£377

One-way from

£273

Popular in

July

Cheapest in

May

Average price

£657
Etihad Airways
  • Etihad Airways
  • 24/4-10/5
  • 2 total stops
  • 37h 40m total
  • London to Southeast Asia
Search Deals
Etihad Airways
  • Etihad Airways
  • 11/4
  • 1 total stop
  • 27h 30m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£61 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 April 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 4 April 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

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 12/5

14:45-23:55

1 stop27h 10m

Phuket City

Sat 23/5

03:20-12:45

1 stop15h 25m

£547

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 16/4

20:45-07:50

1 stop29h 05m

Phuket City

Thu 30/4

09:25-19:20

1 stop15h 55m

£548

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 7/5

21:45-18:10

1 stop14h 25m

Bangkok Suvarnabhumi

Thu 14/5

03:15-15:05

1 stop17h 50m

£564

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sat 18/4

14:50-19:20

1 stop22h 30m

Phuket City

Wed 13/5

03:20-12:45

1 stop15h 25m

£566

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Sun 21/6

09:30-19:45

1 stop27h 15m

Kuala Lumpur Intl

Wed 19/8

09:50-07:00

1 stop28h 10m

£576

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 2/5

20:50-11:25

2 stops31h 35m

Singapore Changi

Tue 5/5

21:15-19:10

2 stops28h 55m

£613

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Mon 22/6

15:35-18:50

1 stop21h 15m

Phuket City

Wed 22/7

09:20-22:00

1 stop18h 40m

£616

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

Fri 15/5

22:05-01:50

1 stop21h 45m

Ho Chi Minh City

Sun 17/5

02:50-19:50

1 stop23h 00m

£631

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 27/4

20:50-12:55

2 stops33h 05m

Singapore Changi

Sat 9/5

21:15-19:10

2 stops28h 55m

£639

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 18/4

20:50-09:05

2 stops29h 15m

Singapore Changi

Sat 25/4

21:15-19:10

2 stops28h 55m

£639

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £377). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £537). 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 4 April 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 4 April 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 4 April 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
1,488 reviews
Check prices

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

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
1,488 reviews
Singapore Airlines
8.2
Very Good
1,488 reviews
Check prices

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

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
1,242 reviews
Singapore Airlines
8.2
Very Good
1,488 reviews
Check prices

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

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
3,730 reviews
Singapore Airlines
8.2
Very Good
1,488 reviews
Check prices

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

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
1,429 reviews
Singapore Airlines
8.2
Very Good
1,488 reviews
Check prices

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

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
146 reviews
Singapore Airlines
8.2
Very Good
1,488 reviews
Check prices

Overall

8.2

Food

7.8

Comfort

8.0

Boarding

8.3

Crew

8.6

Entertainment

8.0

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?

    Etihad Airways, Oman Air, and Qatar Airways can get you from London Heathrow Airport to Southeast Asia in just under 15h 10m. Your travel time can differ by up to 16h 25m. 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 £185. 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 (75%), Air Canada (70%) and EVA Air (70%).

  • 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 £2,410, our data indicates the cheapest price to be £476. The most popular route (London Heathrow - Bangkok Suvarnabhumi), is priced around £415.

  • 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 £377). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of £537). 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 Denpasar flights
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London City to Denpasar flights
Heathrow to Pu Dong flights
Gatwick to Islamabad flights
Stansted to Islamabad flights
London City to Manila flights
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Gatwick to New Delhi flights
Stansted to New Delhi flights
Heathrow to Hanoi flights
Heathrow to Gimpo Intl flights
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Luton to Narita flights
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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 4 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£218Average£566FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
China AirlinesCheapest£345Average£708FlexibilityNo cancel feeOn-time70%
Search China Airlines flights
Scandinavian AirlinesCheapest£345Average£693FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Hainan AirlinesCheapest£358Average£431FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
ITA AirwaysCheapest£371Average£541FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Royal JordanianCheapest£415Average£738FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Royal Brunei AirlinesCheapest£434Average£609FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
CondorCheapest£456Average£733FlexibilityNo cancel feeOn-time76%
Search Condor flights
FinnairCheapest£457Average£849FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£502Average£784FlexibilityNo cancel feeOn-time75%
Search KLM 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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