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

Return flights

06 Sep - 16 Oct	Ryanair
09 Sep - 09 Oct	Ryanair
10 Sep - 24 Sep	Ryanair
16 Sep - 24 Sep	Pegasus Airlines
14 Sep - 26 Sep	Ryanair
01 Sep - 16 Sep	Pegasus Airlines
14 Sep - 28 Sep	Ryanair
15 Sep - 02 Oct	Ryanair
07 Sep - 18 Sep	Ryanair
06 Sep - 22 Sep	Ryanair
12 Sep - 24 Sep	Ryanair
20 Sep - 27 Sep	Pegasus Airlines
18 Sep - 25 Sep	Pegasus Airlines
12 Sep - 12 Oct	Pegasus Airlines
27 Sep - 11 Oct	Pegasus Airlines
26 Sep - 22 Oct	Pegasus Airlines
04 Sep - 07 Oct	Ryanair
24 Sep - 07 Oct	Ryanair
01 Sep - 31 Oct	Pegasus Airlines
15 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 407€

Return flights