AirHint found the following cheapest return flights from London (LON) to Karachi (KHI) in September 2025 (see full year).

Return flights

24 Sep - 22 Oct	AJet
18 Sep - 14 Oct	Pegasus Airlines
18 Sep - 23 Oct	Pegasus Airlines
28 Sep - 14 Oct	Pegasus Airlines
26 Sep - 13 Oct	Pegasus Airlines
30 Sep - 07 Oct	Ryanair
16 Sep - 07 Oct	Wizz Air UK
19 Sep - 30 Sep	Pegasus Airlines
23 Sep - 17 Oct	Wizz Air UK
25 Sep - 09 Oct	Wizz Air UK
27 Sep - 16 Oct	Pegasus Airlines
25 Sep - 28 Sep	Wizz Air UK
20 Sep - 30 Sep	Wizz Air UK
25 Sep - 29 Sep	Pegasus Airlines
27 Sep - 30 Sep	Pegasus Airlines
23 Sep - 30 Sep	AJet
18 Sep - 30 Sep	Pegasus Airlines
17 Sep - 30 Sep	AJet
22 Sep - 28 Sep	Pegasus Airlines
17 Sep - 22 Sep	AJet

Also check the deals for one-way flights from London to Karachi 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 Karachi in September from $389

Return flights