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

Return flights

01 Sep - 02 Oct	Wizz Air UK
12 Sep - 10 Oct	Wizz Air UK
15 Sep - 02 Oct	Wizz Air UK
01 Sep - 10 Oct	Wizz Air UK
16 Sep - 07 Oct	Wizz Air UK
07 Sep - 19 Oct	Wizz Air UK
15 Sep - 06 Oct	Wizz Air UK
29 Sep - 13 Oct	Wizz Air UK
28 Sep - 19 Oct	Wizz Air UK
27 Sep - 10 Oct	Wizz Air UK
14 Sep - 28 Sep	Wizz Air UK
01 Sep - 29 Sep	Wizz Air UK
07 Sep - 28 Sep	Wizz Air UK
22 Sep - 28 Sep	Wizz Air UK
12 Sep - 19 Sep	Wizz Air UK
15 Sep - 29 Sep	Wizz Air UK
16 Sep - 29 Sep	Wizz Air UK
12 Sep - 27 Sep	Wizz Air UK
02 Sep - 28 Sep	Wizz Air UK
12 Sep - 18 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 407€

Return flights