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

Return flights

11 Sep - 10 Oct	Ryanair
01 Sep - 24 Sep	Pegasus Airlines
10 Sep - 24 Sep	Ryanair
16 Sep - 10 Oct	Ryanair
04 Sep - 24 Sep	Ryanair
08 Sep - 03 Oct	AJet
07 Sep - 24 Sep	Ryanair
04 Sep - 03 Oct	Ryanair
10 Sep - 09 Oct	Ryanair
14 Sep - 26 Sep	Ryanair
14 Sep - 11 Oct	Ryanair
11 Sep - 18 Sep	Ryanair
08 Sep - 19 Sep	Ryanair
01 Sep - 25 Sep	Pegasus Airlines
11 Sep - 25 Sep	Pegasus Airlines
07 Sep - 26 Sep	Ryanair
14 Sep - 23 Oct	Ryanair
23 Sep - 11 Oct	Ryanair
30 Sep - 03 Oct	Pegasus Airlines
08 Sep - 06 Oct	Pegasus Airlines

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 383€

Return flights