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

Return flights

06 Sep - 09 Oct	Wizz Air UK
16 Sep - 23 Oct	Wizz Air UK
16 Sep - 26 Oct	Wizz Air UK
17 Sep - 12 Oct	SunExpress
27 Sep - 26 Oct	Wizz Air UK
05 Sep - 09 Oct	Wizz Air UK
12 Sep - 09 Oct	Wizz Air UK
17 Sep - 09 Oct	SunExpress
21 Sep - 12 Oct	Wizz Air UK
05 Sep - 23 Oct	Corendon Airlines
22 Sep - 27 Sep	Wizz Air UK
16 Sep - 30 Sep	Wizz Air UK
06 Sep - 18 Sep	Wizz Air UK
26 Sep - 30 Sep	Wizz Air UK
15 Sep - 21 Sep	Wizz Air UK
08 Sep - 15 Sep	Wizz Air UK
14 Sep - 18 Sep	Wizz Air UK
12 Sep - 18 Sep	Corendon Airlines
05 Sep - 18 Sep	Corendon Airlines
11 Sep - 24 Sep	Wizz Air UK

Also check the deals for one-way flights from London to Islamabad 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 London to Islamabad in September from $444

Return flights