AirHint found the following cheapest return flights from Birmingham (BHX) to Bangkok (BKK) in September 2025 (see full year).

Return flights

11 Sep - 24 Sep	Air India
04 Sep - 30 Sep	Air India
04 Sep - 01 Oct	Air India
13 Sep - 24 Sep	Air India
04 Sep - 26 Sep	Air India
11 Sep - 25 Sep	Air India
27 Sep - 30 Sep	Air India
11 Sep - 18 Sep	Air India
11 Sep - 02 Oct	Air India
25 Sep - 14 Oct	Air India
04 Sep - 18 Sep	Air India
04 Sep - 25 Sep	Air India
04 Sep - 12 Sep	Air India
18 Sep - 16 Oct	Air India
23 Sep - 14 Oct	SWISS
13 Sep - 01 Oct	Air India
04 Sep - 03 Oct	Air India
28 Sep - 13 Oct	Lufthansa
23 Sep - 16 Oct	Lufthansa
28 Sep - 02 Oct	Lufthansa

Also check the deals for one-way flights from Birmingham to Bangkok in September.

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 Birmingham to Bangkok in September from 514€

Return flights