Cheapest return flights from London to Istanbul in September from $274

AirHint found the following cheapest return flights from London (LCY) to Istanbul (IST) in September 2026 (see full year).

Return flights

19 Sep - 02 Oct KLM
30 Sep - 13 Oct KLM
01 Sep - 15 Sep KLM
03 Sep - 15 Sep KLM
19 Sep - 22 Sep KLM
30 Sep - 07 Oct KLM
01 Sep - 22 Sep KLM
15 Sep - 22 Sep KLM
26 Sep - 03 Oct KLM
28 Sep - 05 Oct KLM
03 Sep - 11 Sep KLM
07 Sep - 11 Sep KLM
03 Sep - 17 Sep KLM
01 Sep - 29 Sep KLM
16 Sep - 29 Sep KLM
28 Sep - 17 Oct KLM
23 Sep - 02 Oct KLM
29 Sep - 01 Oct Lufthansa
24 Sep - 06 Oct Lufthansa

Also check the deals for one-way flights from London to Istanbul in September.

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