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

Return flights

28 Apr - 10 May	SWISS
23 Apr - 17 May	SWISS
22 Apr - 13 May	SWISS
07 Apr - 10 May	SWISS
30 Apr - 24 May	SWISS
21 Apr - 08 May	SWISS
14 Apr - 26 Apr	SWISS
08 Apr - 26 Apr	SWISS
21 Apr - 07 May	SWISS
30 Apr - 19 May	SWISS
30 Apr - 21 May	SWISS
28 Apr - 14 May	SWISS
23 Apr - 26 Apr	SWISS
09 Apr - 26 Apr	SWISS
08 Apr - 22 Apr	SWISS
08 Apr - 21 Apr	SWISS
14 Apr - 22 Apr	SWISS
08 Apr - 30 Apr	SWISS
07 Apr - 26 Apr	SWISS
07 Apr - 19 Apr	SWISS

Also check the deals for one-way flights from London to Bangkok in April.

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 April from 583€

Return flights