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

Return flights

09 Apr - 28 Apr	Scandinavian Airlines
07 Apr - 24 Apr	KLM
09 Apr - 24 Apr	Scandinavian Airlines
08 Apr - 21 May	Air China
18 Apr - 30 Apr	Air China
20 Apr - 30 Apr	Air China
13 Apr - 27 Apr	Air China
12 Apr - 26 Apr	Air China
13 Apr - 26 Apr	Air China
15 Apr - 26 Apr	Air China
12 Apr - 27 Apr	Air China
08 Apr - 13 May	Air China
22 Apr - 02 May	Air China
06 Apr - 11 May	Air China
18 Apr - 02 May	Air China
22 Apr - 26 May	Air China
19 Apr - 01 May	Air China
17 Apr - 01 May	Air China
14 Apr - 19 May	Air China
17 Apr - 02 May	Air China

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 531€

Return flights