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

Return flights

25 May - 01 Jun	Air China
26 May - 02 Jun	Air China
27 May - 03 Jun	Air China
28 May - 04 Jun	Air China
29 May - 05 Jun	Air China
30 May - 06 Jun	Air China
31 May - 07 Jun	Air China
10 May - 17 May	Air China
11 May - 18 May	Air China
12 May - 19 May	Air China
13 May - 20 May	Air China
14 May - 21 May	Air China
15 May - 22 May	Air China
16 May - 23 May	Air China
17 May - 24 May	Air China
18 May - 25 May	Air China
19 May - 26 May	Air China
30 May - 20 Jun	Air China
25 May - 05 Jun	Air China
19 May - 03 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 $629

Return flights