Cheap flights from London Heathrow Airport to Bangkok from £284

The month of May is, on average, the cheapest month to fly to Bangkok from London Heathrow Airport, with most prices found around £588. The month of September is another great option to travel to Bangkok, with average flight prices from London Heathrow Airport averaging around £592.

According to our data, Wednesday is the cheapest day to fly to Bangkok from London Heathrow Airport. The lowest ticket price found for a Wednesday departure recently was £712. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Bangkok on Saturday is £777.

In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Bangkok when you can find flight prices for as low as £588. Flying to Bangkok in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around £797. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Bangkok from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around £691 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from London Heathrow Airport for as low as £650 on momondo.

China Eastern, Etihad Airways, and SWISS are the most popular carriers operating from London Heathrow to Bangkok

EVA Air, Thai Airways and Etihad Airways are the top three most popular airlines that fly to Bangkok from London Heathrow Airport according to our data. EVA Air is the first choice among our users, with 39% of people opting to fly with this airline when travelling to Bangkok. Keep in mind that there are 37 different airlines that fly to Bangkok 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 85 minutes.

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

Tuesday is statistically the day of the week that experiences the fewest 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 fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

As of April 2026, 7 flights take off from London Heathrow Airport and land in Bangkok each day. The most common flight departure time for this route is 21:00, with 71% of daily flights taking off in the evening.

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