Cheap flights from Bangkok to London from $519

If you aren’t able to travel during the month of February, then book flights to London from Bangkok during January instead. Flights to London in January, while not as cheap as those in February, still average around $440.

Our data shows that Monday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as $1,440. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Bangkok to London for around $1,637.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as $1,355. In contrast, the most expensive time of day to depart to London is in the morning when prices are around $1,535.

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

You are more likely to see cheaper flights to London from Bangkok when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,408 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Bangkok for as low as $1,204 on momondo.

There are 3 cabin classes available to choose from on Bangkok to London 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 16% of flights between Bangkok and London have experienced a delay on any given week. The average delay length over the past 12 months has been 103 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the morning 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, British Airways have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

The number of flights available between Bangkok and London is 6 per day as of April 2026. The most frequent departure time is 12:00, with 58% of daily flights leaving in the afternoon.

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