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

Return flights

16 Apr - 16 May	Air China
06 Apr - 31 May	Air China
07 Apr - 12 May	Air China
16 Apr - 14 May	Air China
10 Apr - 12 May	Air China
15 Apr - 11 May	Air China
23 Apr - 23 May	Air China
07 Apr - 13 May	Air China
21 Apr - 21 May	Air China
23 Apr - 15 May	Air China
06 Apr - 09 Apr	Air China
08 Apr - 30 Apr	Air China
10 Apr - 30 Apr	Air China
06 Apr - 30 Apr	Air China
20 Apr - 30 Apr	Air China
09 Apr - 30 Apr	Air China
10 Apr - 21 Apr	Scandinavian Airlines
05 Apr - 21 Apr	Scandinavian Airlines
21 Apr - 28 Apr	Gulf Air
15 Apr - 28 Apr	Gulf Air

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 474€

Return flights