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

Return flights

22 Jan - 05 Feb	ITA Airways
21 Jan - 28 Jan	SWISS
15 Jan - 22 Jan	SWISS
27 Jan - 04 Feb	SWISS
08 Jan - 21 Jan	SWISS
21 Jan - 29 Jan	SWISS
06 Jan - 22 Jan	ITA Airways
11 Jan - 11 Feb	SWISS
09 Jan - 23 Jan	ITA Airways
07 Jan - 23 Jan	ITA Airways
27 Jan - 03 Feb	KLM
07 Jan - 18 Jan	SWISS
13 Jan - 24 Feb	SWISS
09 Jan - 16 Jan	ITA Airways
27 Jan - 08 Feb	KLM
19 Jan - 31 Jan	ITA Airways
28 Jan - 01 Feb	KLM
27 Jan - 05 Feb	KLM
20 Jan - 01 Feb	KLM
29 Jan - 01 Feb	KLM

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 $778

Return flights