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Cheap flights from London to Southeast Asia from C$ 545

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 29/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
20 Jun — 27 Jun1
1 adult

Cheap 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 15 June 2025.

Round-trip from

C$ 804

One-way from

C$ 545

Popular in

December

Cheapest in

November

Average price

C$ 1,134
Shenzhen Airlines
  • Shenzhen Airlines
  • 28/11-4/12
  • 2 total stops
  • 61h 25m total
  • London to Southeast Asia
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29/6
  • 29/6
  • 3 total stops
  • 51h 45m total
  • London to Southeast Asia
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Highest demand for flights based on searches. 4% potential increase in price (C$ 76 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 57 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from London to Southeast Asia

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 15 June 2025.

Fri 28/119:10 p.m.LHR - BKK
1 stop31h 00mShenzhen Airlines
Fri 5/127:30 p.m.BKK - LHR
1 stop30h 40mShenzhen Airlines
Deal found 13/6C$ 804
Mon 3/119:15 a.m.LGW - BKK
1 stop23h 10mMultiple Airlines
Mon 10/1112:30 p.m.BKK - LGW
Nonstop13h 00mMultiple Airlines
Deal found 15/6C$ 839
Thu 11/912:35 p.m.LGW - BKK
1 stop29h 35mAir China
Fri 10/101:30 a.m.BKK - LGW
1 stop35h 05mAir China
Deal found 14/6C$ 842
Tue 18/114:00 p.m.LGW - BKK
Nonstop11h 25mNorse Atlantic UK
Wed 3/1212:30 p.m.BKK - LGW
Nonstop13h 00mNorse Atlantic UK
Deal found 14/6C$ 864
Wed 2/76:40 p.m.LHR - BKK
1 stop33h 05mSWISS
Thu 17/712:50 p.m.BKK - LHR
1 stop25h 05mSWISS
Deal found 14/6C$ 876
Thu 11/910:10 p.m.LHR - MNL
1 stop35h 35mChina Southern
Sun 16/118:20 a.m.MNL - LHR
1 stop17h 55mChina Southern
Deal found 14/6C$ 891
Wed 3/910:05 p.m.LHR - MNL
1 stop20h 35mShenzhen Airlines
Fri 12/92:55 a.m.MNL - LHR
1 stop23h 55mShenzhen Airlines
Deal found 15/6C$ 900
Thu 13/119:15 p.m.LGW - BKK
Nonstop11h 55mBritish Airways
Mon 1/1210:55 p.m.BKK - LGW
Nonstop13h 35mBritish Airways
Deal found 13/6C$ 915
Tue 24/67:30 p.m.LHR - BKK
1 stop13h 20mAustrian Airlines
Fri 4/711:40 p.m.BKK - LHR
1 stop28h 00mAustrian Airlines
Deal found 14/6C$ 922
Tue 24/67:30 p.m.LHR - BKK
1 stop13h 20mMultiple Airlines
Tue 1/711:00 p.m.BKK - LHR
1 stop15h 15mMultiple Airlines
Deal found 13/6C$ 926
Wed 25/61:45 p.m.LHR - BKK
2 stops19h 05mLufthansa
Tue 15/711:00 p.m.BKK - LHR
1 stop16h 55mLufthansa
Deal found 14/6C$ 955
Tue 9/98:55 p.m.LHR - BKK
1 stop30h 35mKLM
Tue 7/1012:05 p.m.BKK - LHR
1 stop31h 45mKLM
Deal found 13/6C$ 974

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 15 June 2025.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

London

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 28/11

9:10 p.m.-6:30 p.m.

1 stop38h 20m

Bangkok Suvarnabhumi

Thu 4/12

3:05 a.m.-7:10 p.m.

1 stop23h 05m

C$ 804

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 3/11

9:15 a.m.-3:25 p.m.

1 stop23h 10m

Bangkok Suvarnabhumi

Mon 10/11

12:30 p.m.-6:30 p.m.

Nonstop13h 00m

C$ 839

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 11/9

12:35 p.m.-12:10 a.m.

1 stop29h 35m

Bangkok Suvarnabhumi

Fri 10/10

1:30 a.m.-6:35 a.m.

1 stop35h 05m

C$ 842

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 18/11

4:00 p.m.-10:25 a.m.

Nonstop11h 25m

Bangkok Suvarnabhumi

Wed 3/12

12:30 p.m.-6:30 p.m.

Nonstop13h 00m

C$ 864

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 2/7

6:40 p.m.-9:45 a.m.

1 stop33h 05m

Bangkok Suvarnabhumi

Thu 17/7

12:50 p.m.-7:55 a.m.

1 stop25h 05m

C$ 876

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Thu 11/9

10:10 p.m.-4:45 p.m.

1 stop35h 35m

Manila Ninoy Aquino Intl

Sun 16/11

8:20 a.m.-6:15 p.m.

1 stop17h 55m

C$ 891

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Wed 3/9

10:05 p.m.-1:40 a.m.

1 stop20h 35m

Manila Ninoy Aquino Intl

Fri 12/9

2:55 a.m.-7:50 p.m.

1 stop23h 55m

C$ 900

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 13/11

9:15 p.m.-4:10 p.m.

Nonstop11h 55m

Bangkok Suvarnabhumi

Mon 1/12

10:55 p.m.-5:30 a.m.

Nonstop13h 35m

C$ 915

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 25/6

6:00 a.m.-2:50 p.m.

1 stop26h 50m

Bangkok Suvarnabhumi

Wed 16/7

11:40 p.m.-9:40 p.m.

1 stop28h 00m

C$ 922

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 25/6

1:45 p.m.-2:50 p.m.

2 stops19h 05m

Bangkok Suvarnabhumi

Tue 15/7

11:00 p.m.-9:55 a.m.

1 stop16h 55m

C$ 955

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/6

Showing 1-10 of 60 results
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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, September is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 965). Flying from London to Southeast Asia in December is currently the most expensive (average of C$ 1,441). 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 15 June 2025.

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 15 June 2025.

The most flights from LON 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 - 400.0 mm per month. July is typically the wettest month, when rainfall can reach 400.0 mm. February 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 29.0 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 15 June 2025.
Read reviews from past customers who have flown EVA Air, China Airlines and Hainan Airlines from London to Southeast Asia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,204 reviews
Check prices

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,204 reviews
EVA Air
8.4
Very good
1,204 reviews
Check prices

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,204 reviews
Check prices

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Hainan Airlines
8.1
Very good
39 reviews
EVA Air
8.4
Very good
1,204 reviews
Check prices

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Garuda Indonesia
8.1
Very good
77 reviews
EVA Air
8.4
Very good
1,204 reviews
Check prices

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

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

    The cheapest airlines for a one-way flight from London to Southeast Asia are Norse Atlantic UK (C$ 592), Shenzhen Airlines (C$ 599), and Oman Air (C$ 610).

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

    Most travellers choose London Heathrow - Bangkok Suvarnabhumi, London Gatwick - Bangkok Suvarnabhumi or London Heathrow - Phuket City 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 (62%), EVA Air (59%), Air Canada (57%).

  • 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, September is the cheapest month in which you can book a flight from London to Southeast Asia (average of C$ 965). Flying from London to Southeast Asia in December is currently the most expensive (average of C$ 1,441). 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

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Alternative routes for London to Southeast Asia

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

Top 3 airlines flying from London to Southeast Asia

Discover the top 3 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 15 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapestC$ 731AverageC$ 1,521FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Air ChinaCheapestC$ 801AverageC$ 832FlexibilityNo cancel feeOn-time67%
Search Air China flights
EVA AirCheapestC$ 1,227AverageC$ 1,345FlexibilityNo cancel feeOn-time74%
Search EVA Air flights

Fly with Cheapflights

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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.

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