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

Return flights

08 Jan - 21 Jan	KLM
12 Jan - 29 Jan	SWISS
26 Jan - 29 Jan	SWISS
26 Jan - 03 Feb	SWISS
14 Jan - 11 Feb	SWISS
26 Jan - 12 Feb	SWISS
28 Jan - 11 Feb	SWISS
29 Jan - 11 Feb	SWISS
28 Jan - 04 Feb	SWISS
29 Jan - 12 Feb	SWISS
28 Jan - 29 Jan	SWISS
22 Jan - 25 Jan	KLM
21 Jan - 04 Feb	SWISS
21 Jan - 11 Feb	SWISS
21 Jan - 10 Feb	SWISS
14 Jan - 28 Jan	SWISS
14 Jan - 21 Jan	SWISS
14 Jan - 29 Jan	SWISS
07 Jan - 21 Jan	KLM
12 Jan - 27 Jan	SWISS

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 $911

Return flights