AirHint found the following cheapest return flights from London (LCY) to Bangkok (BKK) in May 2026 (see full year).

Return flights

13 May - 26 May	SWISS
27 May - 07 Jun	SWISS
12 May - 26 May	SWISS
06 May - 19 May	SWISS
13 May - 03 Jun	SWISS
27 May - 10 Jun	SWISS
13 May - 27 May	SWISS
05 May - 20 May	SWISS
12 May - 09 Jun	SWISS
12 May - 16 Jun	SWISS
05 May - 26 May	SWISS
09 May - 26 May	SWISS
07 May - 20 May	SWISS
12 May - 19 May	SWISS
04 May - 24 May	SWISS
19 May - 09 Jun	SWISS
05 May - 09 Jun	SWISS
19 May - 16 Jun	SWISS
30 May - 07 Jun	SWISS
29 May - 14 Jun	SWISS

Also check the deals for one-way flights from London to Bangkok in May.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Bangkok in May from 551€

Return flights