Cheap flights from London Heathrow Airport to Bangkok from C$ 519

The cheapest month to fly to Bangkok from London Heathrow Airport is in May. Flight prices, which tend to average around C$ 1,107, are often lower during this time because this is during the off-season. If you don’t want to visit Bangkok in May, then you should wait until September to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of C$ 1,110.

Our data shows that Wednesday is the least expensive day to fly to Bangkok. Tickets to fly out on this day can be as low as C$ 978. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around C$ 1,664. These prices are subject to change though, so be sure to set up a Price Alert for flights to Bangkok.

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 C$ 988. Flying to Bangkok in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Bangkok is in the morning when prices are around C$ 1,843.

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 C$ 1,285 when searching weeks out. 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 C$ 1,210 on momondo.

There are 2 cabin classes available to choose from on London Heathrow to Bangkok flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 14% 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 89 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 has had the least delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

The number of flights available between London Heathrow Airport and Bangkok is 7 per day as of March 2026. The most frequent departure time is 9:00p.m., with 71% of daily flights leaving in the evening.

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