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

Return flights

20 Sep - 27 Sep	Etihad Airways
27 Sep - 15 Oct	Etihad Airways
16 Sep - 23 Sep	Etihad Airways
20 Sep - 30 Sep	Etihad Airways
29 Sep - 01 Oct	Fly Jinnah
24 Sep - 30 Sep	Qatar Airways
25 Sep - 01 Oct	Turkish Airlines
19 Sep - 30 Sep	Qatar Airways
09 Sep - 23 Sep	Qatar Airways
23 Sep - 26 Oct	Turkish Airlines
18 Sep - 23 Sep	Qatar Airways
11 Sep - 18 Sep	Qatar Airways
20 Sep - 10 Oct	Emirates
20 Sep - 12 Oct	Emirates
13 Sep - 19 Sep	Emirates
10 Sep - 18 Sep	Qatar Airways
26 Sep - 20 Oct	Emirates
11 Sep - 15 Oct	Qatar Airways
08 Sep - 05 Oct	Emirates
19 Sep - 24 Oct	Qatar Airways

Also check the deals for one-way flights from Islamabad to London 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Islamabad to London in September from $608

Return flights