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

Return flights

19 Sep - 26 Sep	KLM
19 Sep - 22 Sep	KLM
26 Sep - 28 Sep	KLM
19 Sep - 21 Sep	KLM
11 Sep - 29 Sep	ITA Airways
17 Sep - 22 Sep	ITA Airways
22 Sep - 30 Sep	KLM
15 Sep - 19 Sep	ITA Airways
17 Sep - 24 Sep	KLM
22 Sep - 25 Sep	KLM
18 Sep - 05 Oct	KLM
24 Sep - 07 Oct	KLM
25 Sep - 12 Oct	KLM
18 Sep - 16 Oct	KLM
29 Sep - 23 Oct	KLM
17 Sep - 01 Oct	KLM
15 Sep - 07 Oct	KLM
12 Sep - 12 Oct	KLM
16 Sep - 14 Oct	SWISS
17 Sep - 10 Oct	KLM

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 589€

Return flights