Cheap flights from Thailand to London from £238

In general, February is the cheapest month to fly from Thailand to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £170. The month of December is another great option to travel to London Heathrow Airport, with average flight prices from Thailand averaging around £191.

On average, the least expensive day to fly to London Heathrow Airport from Thailand is on a Monday. momondo users have found tickets for Monday departures for as low as £752. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Tuesday is £812.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Thailand to London Heathrow Airport in the morning for as low as £761. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £874 on average. Flights to London Heathrow Airport from Thailand in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Thailand when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £747 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Thailand for as low as £675 on momondo.

IndiGo, Kuwait Airways, and Air China are the most popular carriers operating from Thailand to London Heathrow

EVA Air, Thai Airways and Etihad Airways are the top three most popular airlines that fly to London Heathrow Airport from Thailand according to our data. EVA Air is the first choice among our users, with 56% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 13 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between Thailand and London have experienced a delay on any given week. The average delay length over the past 12 months has been 91 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Sunday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Thai Airways have had the fewest delays on this route over the last 12 months, with about 14% of their flights experiencing any sort of delay.

As of May 2026, there are 7 flights per day flying from Thailand to London Heathrow Airport. The most common time of day flights depart is 12:00, with 57% of flights taking off in the afternoon.

49 flights are operational weekly from Thailand to London Heathrow Airport as of May 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.