For a smooth departure, ensure all liquids are in one small bag to avoid long security checks at Heathrow.

Most accurate provider | Gotogate 3 stars |
|---|---|
Most trusted provider | Gotogate 3 stars |
Round-trip from | $599 (Kiwi.com) |
One-way from | $401 (Booking.com) |
Popular in | December |
Cheapest in | September |
Average price | $877 |
Good round-trip deal | $948 or less |
Good one-way deal | $721 or less |
Fly from
Fly to
Route
Depart
Return
Price
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Sun 2/15
9:10 pm-2:15 am
1 stop22h 05m
Bangkok Suvarnabhumi
Sat 3/21
3:15 am-7:10 pm
1 stop22h 55m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Wed 1/14
10:00 am-1:40 pm
1 stop20h 40m
Bangkok Suvarnabhumi
Wed 1/21
1:15 am-12:15 pm
1 stop18h 00m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Fri 4/10
10:05 pm-2:15 am
1 stop22h 10m
Bangkok Suvarnabhumi
Fri 5/8
7:30 pm-7:50 pm
1 stop30h 20m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Sat 3/14
8:55 pm-11:20 pm
1 stop19h 25m
Bangkok Suvarnabhumi
Mon 3/16
2:55 am-12:05 pm
1 stop16h 10m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Mon 11/24
9:05 pm-7:20 am
2 stops27h 15m
Bangkok Suvarnabhumi
Sat 11/29
12:45 pm-9:20 am
1 stop27h 35m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Thu 11/27
10:05 pm-11:30 pm
1 stop18h 25m
Bangkok Suvarnabhumi
Thu 4/30
3:25 pm-7:30 am
1 stop22h 05m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Sat 11/15
1:55 pm-11:30 pm
2 stops26h 35m
Bangkok Suvarnabhumi
Wed 1/14
9:25 am-6:10 pm
1 stop15h 45m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Mon 12/29
1:55 pm-11:45 am
1 stop14h 50m
Bangkok Suvarnabhumi
Sat 1/10
2:55 am-12:05 pm
1 stop16h 10m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Wed 11/12
7:20 pm-11:30 pm
2 stops21h 10m
Bangkok Suvarnabhumi
Thu 3/12
2:40 pm-6:40 am
1 stop23h 00m
LondonBangkok
LHR - BKK
LHRBKK
London Heathrow
Fri 11/14
1:55 pm-10:00 pm
2 stops25h 05m
Bangkok Suvarnabhumi
Tue 12/2
2:55 am-2:30 pm
1 stop18h 35m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Bangkok Suvarnabhumi Airport, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Bangkok Suvarnabhumi Airport (average of $536). Flying from London Heathrow Airport to Bangkok Suvarnabhumi Airport in July is currently the most expensive (average of $749). 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.
Unlike in the evening, when flights are generally more expensive, you can save up to 24% on flights from London Heathrow Airport to Bangkok Suvarnabhumi Airport by exploring options for tickets in the afternoon.
Travelers seeking maximum savings on their London Heathrow Airport to Bangkok Suvarnabhumi Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
About 23% of weekly flights between London and Bangkok have experienced delays in the past year, with the average delay time being 87 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Thai Airways have had the lowest number of delays on this route, with just 22% of flights being delayed.
Doha (DOH) – chosen by Cheapflights users on 24% of 1-stop itineraries from London Heathrow Airport to Bangkok Suvarnabhumi Airport on Cheapflights.
Flights via Vienna (VIE) have the shortest average one-way travel time for 1-stop routes: 13h 15m.
Flights via Vienna (VIE) have the shortest average one-way travel time for 1-stop routes: 13h 15m.
Flights via Vienna (VIE) offer the fastest connection on this route, with an average layover time of 0h 58m.
Boarding
Comfort
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Aug 2025
BKK - TPE
Boarding
Comfort
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Aug 2025
BKK - TPE
Boarding
Comfort
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Aug 2025
BKK - TPE
Boarding
Comfort
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Aug 2025
BKK - TPE
Boarding
Comfort
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Aug 2025
BKK - TPE
Boarding
Comfort
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Aug 2025
BKK - TPE
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$407 | Average$805 | FlexibilityNo cancel fee | On-time86% | |
| Cheapest$539 | Average$634 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$544 | Average$579 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$556 | Average$604 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$560 | Average$636 | FlexibilityNo cancel fee | On-time61% | |
| Cheapest$577 | Average$651 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$600 | Average$817 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$626 | Average$684 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$641 | Average$975 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$683 | Average$748 | FlexibilityNo cancel fee | On-time76% |