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

Return flights

21 Jan - 30 Jan	ITA Airways
14 Jan - 28 Jan	SWISS
15 Jan - 04 Feb	SWISS
21 Jan - 04 Feb	SWISS
06 Jan - 17 Feb	ITA Airways
29 Jan - 05 Feb	ITA Airways
09 Jan - 28 Jan	ITA Airways
22 Jan - 04 Feb	SWISS
23 Jan - 07 Feb	SWISS
16 Jan - 28 Jan	SWISS
12 Jan - 28 Jan	SWISS
07 Jan - 28 Jan	ITA Airways
11 Jan - 11 Feb	SWISS
20 Jan - 28 Jan	ITA Airways
07 Jan - 18 Jan	ITA Airways
14 Jan - 29 Jan	ITA Airways
14 Jan - 27 Jan	ITA Airways
26 Jan - 04 Feb	ITA Airways
26 Jan - 17 Feb	ITA Airways
24 Jan - 11 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 639€

Return flights