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

Return flights

14 Jan - 02 Feb	SWISS
11 Jan - 24 Jan	SWISS
11 Jan - 22 Jan	SWISS
20 Jan - 05 Feb	SWISS
15 Jan - 05 Feb	SWISS
21 Jan - 11 Feb	ITA Airways
21 Jan - 04 Feb	ITA Airways
16 Jan - 02 Feb	SWISS
21 Jan - 28 Jan	ITA Airways
11 Jan - 26 Jan	SWISS
09 Jan - 22 Jan	SWISS
11 Jan - 11 Feb	SWISS
08 Jan - 29 Jan	SWISS
06 Jan - 22 Jan	KLM
16 Jan - 05 Feb	SWISS
06 Jan - 12 Feb	KLM
05 Jan - 21 Jan	ITA Airways
11 Jan - 25 Jan	SWISS
05 Jan - 28 Jan	ITA Airways
30 Jan - 06 Feb	ITA Airways

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 646€

Return flights