Cheap flights from London Heathrow Airport to Bangkok from £297

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London Heathrow to Bangkok are usually found in May or June, booked 64 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Heathrow to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Bangkok (TH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 September 2025.

Round-trip from

£439

One-way from

£297

Popular in

December

Cheapest in

May

Average price

£622
China Southern
  • China Southern
  • 4/3-18/3
  • 2 total stops
  • 43h 30m total
  • London to Bangkok
Air China
  • Air China
  • 2/10
  • 1 total stop
  • 37h 05m total
  • London to Bangkok
Highest demand for flights based on searches. 5% potential increase in price (£29 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Heathrow to Bangkok

Cheapest flights from Heathrow to Bangkok
Explore the most affordable flight options available from Heathrow to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Fri 28/1122:00LHR - BKK
1 stop33h 30mChina Southern
Wed 10/1202:10BKK - LHR
1 stop23h 25mChina Southern
Deal found 12/9£439
Wed 17/912:30LHR - BKK
1 stop25h 05mAir India
Sat 4/1020:50BKK - LHR
1 stop28h 40mAir India
Deal found 10/9£439
Sat 20/921:20LHR - BKK
1 stop21h 20mChina Eastern
Sun 5/1002:10BKK - LHR
1 stop22h 30mChina Eastern
Deal found 12/9£440
Wed 1/1022:00LHR - BKK
1 stop38h 15mHainan Airlines
Thu 30/1001:35BKK - LHR
1 stop23h 00mHainan Airlines
Deal found 10/9£441
Wed 5/1117:40LHR - BKK
1 stop17h 25mAir China
Wed 19/1101:30BKK - LHR
1 stop21h 25mAir China
Deal found 10/9£441
Mon 15/913:15LHR - BKK
1 stop21h 40mAir India
Sat 4/1020:50BKK - LHR
1 stop19h 25mAir India
Deal found 10/9£442
Thu 2/1021:20LHR - BKK
2 stops33h 35mChina Eastern
Sun 19/1015:55BKK - LHR
2 stops32h 45mChina Eastern
Deal found 11/9£443
Thu 2/1021:20LHR - BKK
2 stops33h 35mChina Eastern
Wed 15/1002:10BKK - LHR
1 stop22h 30mChina Eastern
Deal found 10/9£444
Sun 2/1121:00LHR - BKK
1 stop18h 25mChina Eastern
Wed 10/1201:55BKK - LHR
1 stop22h 35mChina Eastern
Deal found 10/9£444
Mon 3/1121:10LHR - BKK
1 stop22h 05mShenzhen Airlines
Thu 20/1103:15BKK - LHR
1 stop22h 55mShenzhen Airlines
Deal found 10/9£445
Fri 7/1121:10LHR - BKK
1 stop31h 00mShenzhen Airlines
Tue 18/1103:15BKK - LHR
1 stop22h 55mShenzhen Airlines
Deal found 10/9£446
Sat 1/1121:00LHR - BKK
1 stop20h 55mChina Eastern
Tue 11/1119:55BKK - LHR
1 stop28h 35mChina Eastern
Deal found 10/9£447

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Bangkok 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 12 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Bangkok that are best for you.

Fly from

Heathrow

Fly to

Bangkok

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 3/12

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Sat 13/12

19:30-19:10

1 stop30h 40m

£446

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 2/11

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Fri 28/11

19:30-19:10

1 stop30h 40m

£446

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 7/11

20:55-23:20

1 stop19h 25m

Bangkok Suvarnabhumi

Mon 10/11

20:50-14:30

1 stop24h 40m

£529

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 16/2

13:55-23:20

1 stop26h 25m

Bangkok Suvarnabhumi

Tue 24/2

02:55-14:30

1 stop18h 35m

£553

LondonBangkok

LHR - DMK

LHRDMK

London Heathrow

Mon 17/11

22:00-04:50

1 stop23h 50m

Bangkok Don Mueang Intl

Fri 28/11

15:20-05:55

2 stops21h 35m

£563

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 24/1

19:20-07:10

1 stop28h 50m

Bangkok Suvarnabhumi

Fri 20/2

02:55-06:40

1 stop34h 45m

£572

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 2/3

19:20-18:25

1 stop16h 05m

Bangkok Suvarnabhumi

Wed 18/3

18:55-06:25

1 stop18h 30m

£583

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 24/2

14:15-13:05

1 stop15h 50m

Bangkok Suvarnabhumi

Wed 18/3

18:55-06:25

1 stop18h 30m

£583

LondonBangkok

LHR - DMK

LHRDMK

London Heathrow

Fri 7/11

22:00-02:30

1 stop21h 30m

Bangkok Don Mueang Intl

Sun 23/11

15:20-05:55

2 stops21h 35m

£588

LondonBangkok

LHR - DMK

LHRDMK

London Heathrow

Sun 28/9

22:10-06:00

2 stops25h 50m

Bangkok Don Mueang Intl

Wed 1/10

20:25-11:30

1 stop21h 05m

£588

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 48 results
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Best time to book a flight from Heathrow to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok 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 Bangkok

How far ahead should I book a flight from London Heathrow Airport to Bangkok?

Use this chart to determine the optimal time to book a return flight from Heathrow to Bangkok. Price data was last updated on 29 August 2025.

The price you pay for your flight from London Heathrow Airport to Bangkok may vary depending on when you book. For the best chance of a lower fare, look to book 64 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 Bangkok?

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Bangkok (average of £717). Flying from London Heathrow Airport to Bangkok 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 BKK?

Find hourly flight availability from Heathrow to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

It’s optimal to fly from London Heathrow Airport to Bangkok at midday. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from London Heathrow Airport to Bangkok?

Use this chart to determine the cheapest time to fly return from Heathrow to Bangkok. Price data was last updated on 7 September 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Bangkok flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London Heathrow Airport to Bangkok

Explore weekly flight availability from Heathrow to Bangkok. 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 12 September 2025.

The most flights from LHR to TH1 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).

How much does it cost for a return flight from London Heathrow Airport to Bangkok?

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated 12 September 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Bangkok, such as EVA Air, Thai Airways, andQatar Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

8.4

Comfort

8.3

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Overall

8.4

Comfort

8.3

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Overall

8.4

Comfort

8.3

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Overall

8.4

Comfort

8.3

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Overall

8.4

Comfort

8.3

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Overall

8.4

Comfort

8.3

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Bangkok. 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 Bangkok?

    For as low as £529, Shenzhen Airlines can have you in Bangkok from London Heathrow Airport in 19h 25m. Airlines will cover a distance of 5947 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Bangkok round-trip?

    Flying on SAUDIA is currently your cheapest option to Bangkok, with prices starting at £333. Additional return tickets that might be worth considering are offered by Shenzhen Airlines and Norse Atlantic UK, with the lowest prices starting at £334 and £346, respectively. Users have found that SAUDIA is 52% cheaper than the other options available to this destination.

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

    One-way options have recently been found by users for as low as £306 on Austrian Airlines. Other airlines that offer cheap prices include Etihad Airways from £340 and Shenzhen Airlines from £343 one-way.

  • What are the most reliable airlines from London Heathrow Airport to Bangkok?

    Before booking your flight to Bangkok from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: EVA Air (82%), Thai Airways (77%), Air Canada( 69%).

  • What are the cheapest flights from London Heathrow Airport to Bangkok?

    On average you can expect to pay £2,670 for a flight from London Heathrow Airport to Bangkok. The cheapest flight overall is £409 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at £360.

  • Where are the most common stopover locations when flying from London Heathrow Airport to Bangkok?

  • What are some popular points of interest to see during a stopover in Abu Dhabi?

    Etihad Towers, Sheikh Zayed Mosque, and Emirates Park Zoo are the most popular attractions in Abu Dhabi if you're in need of something to do during your stopover. Travellers on a stopover in Abu Dhabi can visit Etihad Towers, Sheikh Zayed Mosque, and Emirates Park Zoo, by travelling 20.8 mi, 11.2 mi, and 7.9 mi, respectively after landing at Abu Dhabi Zayed Intl. Those on a stopover in Abu Dhabi in need of a car hire can book one at Abu Dhabi Zayed Intl for about £16.

  • What are points of interest worth seeing during a stopover in Beijing?

    Summer Palace, Forbidden City, and The Antiquarium of the Palace Museum are currently the most popular points of interest in Beijing. Summer Palace, Forbidden City, and The Antiquarium of the Palace Museum can be visited by travelling about 17.3 mi, 15.1 mi, and 14.9 mi respectively from Beijing Capital.

  • Where are the least popular stopover locations for London Heathrow Airport to Bangkok flights?

  • Can I find deals for flights from Heathrow to Bangkok that include hotel bookings?

    Yes. In addition to deals on Heathrow to Bangkok flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Bangkok?

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

  • Can I find deals for business class flights from Heathrow to Bangkok?

    Yes. Cheapflights offers flight deals from Heathrow to Bangkok 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 Bangkok?

    Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Bangkok (average of £717). Flying from London Heathrow Airport to Bangkok 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 are the most eco-friendly airlines from Heathrow to Bangkok?

    There are a couple of options for flights from Heathrow to Bangkok for sustainable travel. Some great options to travel with are KLM, Finnair, Etihad, and Qatar Airways. If you fly with KLM, you will be flying with one of the most eco-friendly airlines in the world. KLM has a carbon emission reduction programme that has been helping the environment by reducing fuel, replacing fossil fuels, and offsetting Carbon Dioxide Emissions. Finnair is another great choice for eco-friendly travel. This airline has been making aircraft that are more fuel-efficient and use more bio-fuel in their planes. Qatar Airways allow passengers to contribute to the Carbon Offset Programme they have created. If you fly with Etihad, you will be flying with an airline that is in the process of making environmentally-friendly fuel so that they have zero carbon emissions by the year 2050.

  • How to fly more sustainably from Heathrow to Bangkok?

    There are many ways you can travel more sustainably when you fly. One of the best ways is to travel in Economy Class. The seats in this class take up less space, creating more room for more seats. The fewer trips a plane has to make, the better it is for the environment. Taking a direct flight or a flight with only one stopover is another great option, as it saves a ton of fuel. Packing a light bag makes the plane lighter. So if you have the option, don’t overpack to save fuel. Flying with an environmental airline is always recommended. So fly with KLM, Finnair, Etihad or Qatar Airways.

See more FAQs

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Top 10 airlines flying from Heathrow to Bangkok

Discover the top 10 airlines that operate flights from Heathrow to Bangkok. 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 12 September 2025.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest£333Average£549FlexibilityNo cancel feeOn-time86%
Search SAUDIA flights
Norse Atlantic UKCheapest£346Average£561FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Hainan AirlinesCheapest£375Average£430FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
Royal Brunei AirlinesCheapest£464Average£539FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
Austrian AirlinesCheapest£472Average£645FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
KLMCheapest£482Average£704FlexibilityNo cancel feeOn-time75%
Search KLM flights
SWISSCheapest£482Average£659FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air FranceCheapest£486Average£720FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£490Average£906FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Turkish AirlinesCheapest£503Average£624FlexibilityNo cancel feeOn-time77%
Search Turkish 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 Bangkok?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Bangkok. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Bangkok?

Cheapflights helps you find that perfect flight to Bangkok from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Bangkok with no change fees?

Need flexible booking options for your flight to Bangkok from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Bangkok become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Bangkok 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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