Cheapest return flights from London to Istanbul in September from 172€

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

Return flights

03 Sep - 26 Sep KLM
01 Sep - 15 Sep KLM
12 Sep - 16 Sep KLM
24 Sep - 01 Oct KLM
18 Sep - 26 Sep Air France
03 Sep - 30 Sep British Airways direct
26 Sep - 03 Oct British Airways direct
20 Sep - 03 Oct British Airways direct
10 Sep - 15 Sep KLM
26 Sep - 30 Sep British Airways direct
07 Sep - 20 Sep Air France
19 Sep - 04 Oct British Airways direct
06 Sep - 12 Sep KLM
07 Sep - 15 Sep Air France
24 Sep - 01 Oct British Airways direct
28 Sep - 04 Oct British Airways direct
07 Sep - 09 Oct British Airways direct
25 Sep - 02 Oct Air France
25 Sep - 02 Oct British Airways direct
26 Sep - 16 Oct Vueling Airlines

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

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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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