May is the cheapest month to fly this route, with average fares around $821 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $821 | $788 | Best | |
| June 2026 | $828 | $748 | ||
| July 2026 | $946 | $891 | ||
| August 2026 | $971 | $956 | Peak |
Departing on Thursday offers the lowest average fares at $872. Saturday departures are the most expensive at $898, a difference of $26.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Bangkok to London is May, with average round-trip fares around $821. The lowest fare found in May is $788.
Thursday departures are the cheapest, averaging $872 round trip. The most expensive day is Saturday at $898.
Based on current pricing trends, booking for May travel offers the best value. Avoid August if possible, as fares average $971 compared to $821 in the cheapest month. July is a solid middle-ground option at $946.
Flying in May instead of August can save you approximately $150 per round trip. The cheapest month averages $821 while the most expensive averages $971.
Airlines, flight times, price calendar, and more for Bangkok to London
View BKK → LHR Details