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

Return flights

25 Sep - 27 Sep	AJet	direct
25 Sep - 30 Sep	AJet	direct
25 Sep - 28 Sep	AJet	direct
25 Sep - 29 Sep	AJet	direct
25 Sep - 06 Oct	AJet	direct
24 Sep - 08 Oct	AJet	direct
11 Sep - 14 Sep	Pegasus Airlines
11 Sep - 15 Sep	Pegasus Airlines
11 Sep - 19 Sep	Pegasus Airlines
24 Sep - 27 Sep	AJet	direct
24 Sep - 29 Sep	AJet	direct
26 Sep - 29 Sep	AJet	direct
29 Sep - 04 Oct	AJet	direct
30 Sep - 11 Oct	AJet	direct
26 Sep - 05 Oct	AJet	direct
27 Sep - 03 Oct	AJet	direct
20 Sep - 12 Oct	Pegasus Airlines	direct
20 Sep - 17 Oct	Pegasus Airlines	direct

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 129€

Return flights