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

Return flights

05 Jan - 29 Jan	Air China
10 Jan - 24 Jan	Air China
04 Jan - 04 Feb	Air China
07 Jan - 26 Jan	Air China
12 Jan - 19 Jan	Air China
15 Jan - 25 Jan	Air China
24 Jan - 28 Jan	Air China
19 Jan - 28 Jan	Air China
04 Jan - 28 Jan	Air China
06 Jan - 27 Jan	Air China
07 Jan - 28 Jan	Air China
29 Jan - 08 Feb	Air China
27 Jan - 11 Feb	Air China
29 Jan - 11 Feb	Air China
25 Jan - 09 Feb	Air China
09 Jan - 07 Feb	Air China
09 Jan - 06 Feb	Air China
16 Jan - 01 Feb	Air China
05 Jan - 01 Feb	Air China
22 Jan - 11 Feb	Air China

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

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 January from $620

Return flights