Cheapest return flights from London to Istanbul in September from $416

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

Return flights

25 Sep - 02 Oct KLM
09 Sep - 13 Sep KLM
05 Sep - 13 Sep KLM
17 Sep - 20 Sep SWISS
01 Sep - 01 Oct KLM
21 Sep - 23 Sep Air Dolomiti
01 Sep - 13 Sep KLM
18 Sep - 20 Sep SWISS
21 Sep - 24 Sep KLM
21 Sep - 27 Sep SWISS
25 Sep - 29 Sep KLM
11 Sep - 18 Sep KLM

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

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