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

Return flights

19 Sep - 26 Sep	AJet
26 Sep - 03 Oct	AJet
26 Sep - 06 Oct	AJet
26 Sep - 28 Sep	AJet
26 Sep - 29 Sep	AJet
19 Sep - 23 Sep	AJet
26 Sep - 05 Oct	AJet
18 Sep - 25 Sep	Pegasus Airlines
24 Sep - 30 Sep	Pegasus Airlines
20 Sep - 23 Sep	AJet
30 Sep - 04 Oct	Pegasus Airlines
18 Sep - 01 Oct	AJet
25 Sep - 29 Sep	Pegasus Airlines
25 Sep - 28 Sep	AJet
22 Sep - 24 Sep	Pegasus Airlines
29 Sep - 03 Oct	AJet
30 Sep - 02 Oct	Pegasus Airlines
30 Sep - 07 Oct	Pegasus Airlines
30 Sep - 01 Oct	Pegasus Airlines
30 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 116€

Return flights