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

Return flights

15 Apr - 10 May	Hainan Airlines
10 Apr - 10 May	Hainan Airlines
15 Apr - 23 Apr	Hainan Airlines
10 Apr - 09 May	China Eastern
11 Apr - 10 May	China Eastern
21 Apr - 15 May	China Eastern
26 Apr - 13 May	China Eastern
21 Apr - 17 May	China Eastern
27 Apr - 05 May	China Eastern
13 Apr - 30 Apr	Hainan Airlines
16 Apr - 27 Apr	Air India
21 Apr - 20 May	Air China
07 Apr - 22 Apr	Air India
06 Apr - 22 Apr	Air India
08 Apr - 23 Apr	Air India
15 Apr - 22 Apr	Air India
09 Apr - 16 Apr	Air China
21 Apr - 28 Apr	Air India
21 Apr - 29 Apr	Air India
27 Apr - 04 May	Air India

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 $523

Return flights