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

Return flights

28 Sep - 05 Oct	Fly Jinnah
29 Sep - 06 Oct	SalamAir
29 Sep - 10 Oct	Fly Jinnah
20 Sep - 17 Oct	Fly Jinnah
29 Sep - 03 Oct	Fly Jinnah
22 Sep - 03 Oct	Fly Jinnah
26 Sep - 29 Sep	Serene Air
21 Sep - 15 Oct	SalamAir
25 Sep - 06 Oct	Fly Jinnah
20 Sep - 30 Sep	Fly Jinnah
24 Sep - 24 Oct	Fly Jinnah
23 Sep - 28 Sep	Fly Jinnah
30 Sep - 06 Oct	PIA
20 Sep - 24 Sep	Fly Jinnah
24 Sep - 29 Sep	Fly Jinnah
22 Sep - 26 Sep	Fly Jinnah
21 Sep - 26 Sep	flydubai
22 Sep - 25 Sep	Etihad Airways
23 Sep - 27 Sep	PIA
22 Sep - 30 Sep	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 $566

Return flights