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

Return flights

19 May - 29 May	Air China
14 May - 27 May	Air China
14 May - 29 May	Air China
21 May - 05 Jun	Air China
23 May - 01 Jun	Air China
21 May - 01 Jun	Air China
26 May - 03 Jun	Air China
28 May - 08 Jun	Air China
08 May - 15 May	Air China
23 May - 05 Jun	Air China
28 May - 10 Jun	Air China
19 May - 09 Jun	Air China
06 May - 14 May	Lufthansa
16 May - 26 May	Lufthansa
11 May - 19 May	Lufthansa
13 May - 20 May	Lufthansa
12 May - 09 Jun	SWISS
05 May - 19 May	Austrian Airlines
06 May - 13 May	Lufthansa
14 May - 02 Jun	Lufthansa

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 $643

Return flights