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

Return flights

10 Apr - 21 Apr	British Airways
07 Apr - 28 Apr	Scandinavian Airlines
20 Apr - 27 Apr	Air China
07 Apr - 27 May	Air China
06 Apr - 26 May	Air China
19 Apr - 06 May	Air China
07 Apr - 21 May	Air China
09 Apr - 02 May	Air China
27 Apr - 15 May	Air China
15 Apr - 20 May	Air China
15 Apr - 02 May	Air China
06 Apr - 13 May	Air China
11 Apr - 30 May	Air China
22 Apr - 29 Apr	Etihad Airways
21 Apr - 28 Apr	Gulf Air
23 Apr - 30 Apr	Gulf Air
13 Apr - 20 Apr	Gulf Air
14 Apr - 21 Apr	Gulf Air
15 Apr - 22 Apr	Gulf Air
16 Apr - 23 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 $614

Return flights