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

Return flights

12 May - 12 Jun	Air China
16 May - 29 May	Air China
09 May - 22 May	Air China
21 May - 27 May	Air China
12 May - 22 May	Air China
21 May - 01 Jun	Air China
28 May - 03 Jun	Air China
21 May - 03 Jun	Air China
30 May - 10 Jun	Air China
07 May - 22 May	Air China
09 May - 27 May	Air China
12 May - 26 May	Lufthansa
16 May - 01 Jun	Air China
28 May - 12 Jun	Air China
26 May - 10 Jun	Air China
12 May - 11 Jun	Air China
13 May - 25 May	Lufthansa
06 May - 25 May	Lufthansa
15 May - 22 May	Lufthansa
30 May - 20 Jun	Air China

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 505€

Return flights