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

Return flights

28 Jan - 10 Feb	SWISS
20 Jan - 11 Feb	SWISS
27 Jan - 10 Feb	SWISS
27 Jan - 11 Feb	SWISS
28 Jan - 11 Feb	SWISS
20 Jan - 10 Feb	SWISS
21 Jan - 28 Jan	SWISS
27 Jan - 12 Feb	SWISS
25 Jan - 12 Feb	SWISS
14 Jan - 21 Jan	SWISS
27 Jan - 03 Feb	SWISS
25 Jan - 05 Feb	SWISS
20 Jan - 28 Jan	SWISS
20 Jan - 22 Jan	SWISS
25 Jan - 29 Jan	SWISS
20 Jan - 29 Jan	SWISS
13 Jan - 27 Jan	SWISS
13 Jan - 28 Jan	SWISS
18 Jan - 21 Jan	SWISS
14 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 536€

Return flights