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

Return flights

04 Apr - 09 May	Air Arabia
01 Apr - 17 Apr	Thai Lion Air
02 Apr - 01 May	IndiGo
01 Apr - 13 Apr	Thai Lion Air
01 Apr - 07 Apr	Thai Lion Air
03 Apr - 10 Apr	IndiGo
01 Apr - 12 Apr	Thai AirAsia X
03 Apr - 17 Apr	IndiGo
02 Apr - 18 Apr	IndiGo
21 Apr - 29 Apr	IndiGo
03 Apr - 18 Apr	IndiGo
02 Apr - 09 Apr	China Eastern
29 Apr - 05 May	Thai Lion Air
29 Apr - 09 May	Thai Lion Air
21 Apr - 05 May	IndiGo
29 Apr - 10 May	Thai Lion Air
21 Apr - 04 May	IndiGo
26 Apr - 07 May	Thai Lion Air
15 Apr - 06 May	Hainan Airlines
30 Apr - 15 May	Thai AirAsia X

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 486€

Return flights