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

Return flights

10 Apr - 07 May	Ryanair
29 Apr - 21 May	Wizz Air UK
07 Apr - 26 Apr	Ryanair
07 Apr - 10 May	Ryanair
29 Apr - 07 May	Wizz Air UK
22 Apr - 03 May	Wizz Air UK
22 Apr - 10 May	Wizz Air UK
22 Apr - 26 Apr	Wizz Air UK
19 Apr - 12 May	Wizz Air UK
07 Apr - 07 May	Ryanair
07 Apr - 03 May	Ryanair
15 Apr - 07 May	Wizz Air UK
15 Apr - 23 Apr	Wizz Air UK
19 Apr - 26 Apr	Wizz Air UK
12 Apr - 26 Apr	Wizz Air UK
10 Apr - 26 Apr	Ryanair
15 Apr - 26 Apr	Wizz Air UK
09 Apr - 26 Apr	Ryanair
04 Apr - 17 Apr	Ryanair
08 Apr - 26 Apr	Wizz Air UK

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 403€

Return flights