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

Return flights

02 Apr - 18 Apr	Thai AirAsia
04 Apr - 12 Apr	Thai Lion Air
02 Apr - 16 Apr	Thai Lion Air
01 Apr - 12 Apr	AirAsia
30 Apr - 14 May	AirAsia
01 Apr - 11 Apr	AirAsia
25 Apr - 02 May	AirAsia
01 Apr - 13 Apr	Thai AirAsia
24 Apr - 10 May	Thai AirAsia
29 Apr - 08 May	Thai Lion Air
23 Apr - 30 Apr	Thai Lion Air
28 Apr - 10 May	AirAsia
15 Apr - 23 Apr	Thai Lion Air
29 Apr - 10 May	AirAsia
01 Apr - 10 Apr	Thai Lion Air
05 Apr - 23 Apr	Thai Lion Air
21 Apr - 20 May	Thai AirAsia

Also check the deals for one-way flights from Bangkok to London 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 Bangkok to London in April from $803

Return flights