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

Return flights

06 May - 20 May	ITA Airways
05 May - 20 May	KLM
08 May - 20 May	KLM
03 May - 20 May	KLM
01 May - 20 May	KLM
10 May - 20 May	KLM
13 May - 20 May	KLM
01 May - 15 May	KLM
03 May - 15 May	KLM
08 May - 15 May	KLM
12 May - 06 Jun	KLM
19 May - 06 Jun	KLM
19 May - 04 Jun	KLM
15 May - 05 Jun	KLM
05 May - 05 Jun	KLM
01 May - 01 Jun	KLM
22 May - 07 Jun	SWISS
29 May - 06 Jun	KLM
21 May - 06 Jun	KLM
28 May - 07 Jun	KLM

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 $811

Return flights