Find flights
Deals
When to book
FAQs

Cheap flights from London to Southeast Asia from C$ 530

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from London to Southeast Asia
Explore the most affordable flight options available from London to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2026.

Wed 6/59:20 p.m.
LHR
-
BKK
1 stop17h 35m
China Eastern
Tue 19/52:10 a.m.
BKK
-
LHR
1 stop22h 30m
China Eastern
Deal found 20/3C$ 783
Mon 27/49:20 p.m.
LHR
-
BKK
1 stop33h 10m
China Eastern
Wed 13/55:05 a.m.
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 18/3C$ 785
Mon 11/59:20 p.m.
LHR
-
BKK
1 stop17h 35m
China Eastern
Tue 19/59:55 p.m.
BKK
-
LHR
1 stop26h 45m
China Eastern
Deal found 21/3C$ 786
Fri 15/511:35 a.m.
LGW
-
BKK
1 stop18h 55m
China Eastern
Sun 17/59:55 p.m.
BKK
-
LGW
1 stop23h 05m
China Eastern
Deal found 18/3C$ 787
Mon 4/54:15 p.m.
LHR
-
BKK
1 stop15h 30m
SAUDIA
Tue 7/73:25 p.m.
BKK
-
LHR
1 stop22h 05m
SAUDIA
Deal found 18/3C$ 790
Tue 5/59:20 p.m.
LHR
-
BKK
1 stop21h 20m
China Eastern
Sun 17/53:55 p.m.
BKK
-
LHR
2 stops32h 45m
China Eastern
Deal found 20/3C$ 793
Wed 29/49:20 p.m.
LHR
-
BKK
2 stops33h 00m
China Eastern
Wed 13/55:05 a.m.
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 17/3C$ 794
Mon 11/59:20 p.m.
LHR
-
BKK
1 stop21h 20m
China Eastern
Sun 17/53:00 a.m.
BKK
-
LHR
2 stops21h 40m
China Eastern
Deal found 21/3C$ 796
Fri 15/511:35 a.m.
LGW
-
BKK
1 stop18h 55m
China Eastern
Mon 18/57:50 a.m.
BKK
-
LGW
3 stops37h 10m
China Eastern
Deal found 17/3C$ 797
Fri 1/510:05 p.m.
LHR
-
BKK
1 stop22h 10m
Shenzhen Airlines
Thu 14/53:15 a.m.
BKK
-
LHR
1 stop22h 45m
Shenzhen Airlines
Deal found 17/3C$ 797
Mon 11/511:35 a.m.
LGW
-
BKK
2 stops31h 40m
China Eastern
Thu 14/52:10 a.m.
BKK
-
LGW
1 stop18h 50m
China Eastern
Deal found 18/3C$ 798
Fri 1/510:05 p.m.
LHR
-
BKK
1 stop38h 10m
Shenzhen Airlines
Tue 12/57:15 p.m.
BKK
-
LHR
1 stop30h 45m
Shenzhen Airlines
Deal found 17/3C$ 800

Find flight deals from London to Southeast Asia

Keep the following information in mind while searching for London to Southeast Asia flight deals. Data was last updated 22 March 2026.

Round-trip from

C$ 783

One-way from

C$ 530

Popular in

December

Cheapest in

May

Average price

C$ 1,273
China Eastern
  • China Eastern
  • 6/5-19/5
  • 2 total stops
  • 40h 05m total
  • London to Southeast Asia
Search Deals
SAUDIA
  • SAUDIA
  • 4/5
  • 1 total stop
  • 15h 30m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 67 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 629,999 searches. Data last updated 22 March 2026.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 22/4

10:05 p.m.-2:15 a.m.

1 stop22h 10m

Bangkok Suvarnabhumi

Sun 17/5

3:15 a.m.-7:50 p.m.

1 stop22h 35m

C$ 823

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 4/6

6:00 p.m.-9:55 p.m.

1 stop21h 55m

Bangkok Suvarnabhumi

Mon 8/6

4:50 p.m.-3:00 p.m.

1 stop28h 10m

C$ 848

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 22/6

9:45 p.m.-11:50 p.m.

1 stop20h 05m

Bangkok Suvarnabhumi

Mon 29/6

3:15 a.m.-12:45 p.m.

1 stop15h 30m

C$ 1,048

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 26/4

2:55 p.m.-1:20 p.m.

1 stop16h 25m

Bangkok Suvarnabhumi

Tue 19/5

2:05 a.m.-1:25 p.m.

1 stop17h 20m

C$ 1,081

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 19/4

10:40 a.m.-9:45 a.m.

1 stop17h 05m

Bangkok Suvarnabhumi

Thu 30/4

8:15 p.m.-6:55 a.m.

1 stop16h 40m

C$ 1,082

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Mon 6/4

8:45 p.m.-6:30 p.m.

1 stop15h 45m

Phuket City

Wed 22/4

3:20 a.m.-12:45 p.m.

1 stop15h 25m

C$ 1,102

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sat 18/4

2:45 p.m.-7:35 a.m.

1 stop34h 50m

Phuket City

Sun 3/5

3:20 p.m.-7:00 a.m.

1 stop21h 40m

C$ 1,102

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Fri 24/4

8:45 p.m.-11:55 p.m.

1 stop21h 10m

Phuket City

Tue 5/5

3:20 a.m.-12:45 p.m.

1 stop15h 25m

C$ 1,104

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 17/5

9:45 p.m.-6:20 p.m.

1 stop14h 35m

Phuket City

Fri 22/5

3:20 a.m.-12:45 p.m.

1 stop15h 25m

C$ 1,107

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 1/4

2:55 p.m.-12:55 p.m.

1 stop16h 00m

Bangkok Suvarnabhumi

Wed 3/6

8:30 p.m.-6:40 a.m.

1 stop16h 10m

C$ 1,110

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from London to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from London with our price prediction graph.
Estimated round-trip 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 to Southeast Asia

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

Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 558). Flying from London to Southeast Asia in July is currently the most expensive (average of C$ 765). 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 LON to YJX?

Find hourly flight availability from London 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 22 March 2026.

When flying from London to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Southeast Asia

Explore weekly flight availability from London 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 22 March 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 on average).

Related info for your journey

Find useful and relevant information for your journey from London 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 to Southeast Asia?

    There are many flights that can get you from London to Southeast Asia in 20h 05m. Fly via Shenzhen Airlines, China Eastern, or Etihad Airways to get the fastest option. Airlines will cover a distance of 9571 km. This flight may include one or multiple stops.

  • What are the most popular routes from London to Southeast Asia?

    Most travellers choose London Heathrow - Manila Ninoy Aquino Intl, London Gatwick - Bangkok Suvarnabhumi or London Heathrow - Bangkok Suvarnabhumi when deciding on the best route from London to Southeast Asia.

  • What are the most reliable airlines from London to Southeast Asia?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Southeast Asia on time: Thai Airways (88%), Air Canada (86%), EVA Air (84%).

  • What are the cheapest flights from London to Southeast Asia?

    While on average a flight from London to Southeast Asia is generally C$ 1,695, our data shows the cheapest flight currently is C$ 1,497. When looking at the most popular route, (London Heathrow - Manila Ninoy Aquino Intl), you can expect to pay C$ 1,414 for that flight.

  • Can I find deals for flights from London to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on London to Southeast Asia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Southeast Asia.

  • Can I find deals for business class flights from London to Southeast Asia?

    Yes. Cheapflights offers flight deals from London 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 to Southeast Asia?

    Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 558). Flying from London to Southeast Asia in July is currently the most expensive (average of C$ 765). 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 London to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to New Delhi flights
Heathrow to Manila flights
Heathrow to Suvarnabhumi flights
Heathrow to Phuket City flights

Top 2 airlines flying from London to Southeast Asia

Discover the top 2 airlines that operate flights from London 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 629,999 searches. Data last updated 22 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapestC$ 765AverageC$ 823FlexibilityNo cancel feeOn-time67%
Search Air China flights
EVA AirCheapestC$ 1,240AverageC$ 1,330FlexibilityNo cancel feeOn-time74%
Search EVA Air flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Southeast Asia?

When you search for this flight from London 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 London 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 London.

Can Cheapflights find flights from London to Southeast Asia with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Southeast Asia flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Southeast Asia become cheaper?

Yes, Cheapflights offers price alerts on London to Southeast Asia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the 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.