Cheap flights from London Heathrow Airport to Bangkok from $372

The month of May is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from London Heathrow Airport, with most prices found around $809. The month of September is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from London Heathrow Airport averaging around $811.

The cheapest day to depart on your flight to Bangkok Suvarnabhumi Airport is on a Tuesday when prices can be found for as low as $961. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,075.

Our most recent data shows that the best time of day to fly to Bangkok Suvarnabhumi Airport is in the afternoon. Flights from London Heathrow Airport to Bangkok Suvarnabhumi Airport during this time can be as low as $772. In the evening is when there is more demand to fly to Bangkok Suvarnabhumi Airport, so prices are often more expensive at around $1,059 per ticket.

Fly from London Heathrow to Bangkok Suvarnabhumi for the best London Heathrow - Bangkok Suvarnabhumi flight prices

You are more likely to see cheaper flights to Bangkok Suvarnabhumi Airport from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok Suvarnabhumi Airport for around $939 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok Suvarnabhumi Airport from London Heathrow Airport for as low as $884 on momondo.

There are 4 cabin classes available to choose from on London Heathrow to Bangkok Suvarnabhumi flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

China Eastern is the most popular carrier operating from London Heathrow to Bangkok Suvarnabhumi

Thai Airways, EVA Air and Etihad Airways are the top three most popular airlines that fly to Bangkok Suvarnabhumi Airport from London Heathrow Airport according to our data. Thai Airways is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Bangkok Suvarnabhumi Airport. Keep in mind that there are 20 different airlines that fly to Bangkok Suvarnabhumi Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between London and Bangkok have experienced a delay on any given week. The average delay length over the past 12 months has been 88 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, EVA Air have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Abu Dhabi (AUH) was the most common stop: 24% of momondo users choosing 1-stop flights on this route connected there.

Flights via Guangzhou (CAN) offer the lowest average round-trip price of $602.

Flights connecting via Vienna (VIE) have the shortest average one-way travel time: 13h 13m.

Vienna (VIE) has the shortest average layover time for this route: 0h 55m.

7 flights are operational daily from London Heathrow Airport to Bangkok Suvarnabhumi Airport as of March 2026. The most popular departure time for this route is 9:00PM, with 71% of flights per day taking off in the evening.

As of March 2026, there are 49 flights per week flying from London Heathrow Airport to Bangkok Suvarnabhumi Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.