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

Return flights

23 Sep - 30 Sep	AJet
30 Sep - 14 Oct	AJet
23 Sep - 25 Sep	AJet
24 Sep - 30 Sep	AJet
27 Sep - 30 Sep	AJet
25 Sep - 28 Sep	AJet
22 Sep - 29 Sep	Pegasus Airlines
24 Sep - 29 Sep	AJet
24 Sep - 28 Sep	AJet
22 Sep - 22 Oct	Pegasus Airlines
27 Sep - 28 Sep	AJet
28 Sep - 30 Sep	Pegasus Airlines
24 Sep - 02 Oct	Pegasus Airlines
30 Sep - 12 Oct	Pegasus Airlines
28 Sep - 05 Oct	AJet
29 Sep - 03 Oct	Pegasus Airlines
25 Sep - 04 Oct	AJet
30 Sep - 20 Oct	Pegasus Airlines
24 Sep - 13 Oct	Pegasus Airlines
24 Sep - 03 Oct	Pegasus Airlines

Also check the deals for one-way flights from Istanbul 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.

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Cheapest return flights from Istanbul to London in September from 115€

Return flights