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

Return flights

05 Sep - 25 Sep	PIA
15 Sep - 25 Sep	PIA
01 Sep - 10 Sep	PIA
21 Sep - 28 Sep	Fly Jinnah
01 Sep - 13 Sep	PIA
01 Sep - 07 Sep	PIA
15 Sep - 20 Sep	PIA
01 Sep - 06 Sep	PIA
05 Sep - 13 Sep	PIA
08 Sep - 15 Sep	PIA
24 Sep - 06 Oct	PIA
23 Sep - 05 Oct	Etihad Airways
30 Sep - 10 Oct	Etihad Airways
20 Sep - 03 Oct	Gulf Air
30 Sep - 04 Oct	Etihad Airways
27 Sep - 03 Oct	Gulf Air
05 Sep - 05 Oct	Etihad Airways
02 Sep - 31 Oct	Etihad Airways
05 Sep - 04 Oct	Etihad Airways
26 Sep - 03 Oct	Etihad Airways

Also check the deals for one-way flights from Islamabad 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 Islamabad to Bangkok in September from 463€

Return flights