Cheapest return flights from London to Istanbul in September from $219

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

Return flights

03 Sep - 12 Sep KLM
01 Sep - 24 Sep KLM
28 Sep - 07 Oct KLM
01 Sep - 01 Oct KLM
13 Sep - 26 Sep KLM
29 Sep - 06 Oct British Airways direct
26 Sep - 03 Oct Air Serbia
08 Sep - 29 Sep British Airways direct
26 Sep - 03 Oct British Airways direct
04 Sep - 12 Sep Air France
04 Sep - 15 Sep Air France
23 Sep - 29 Sep British Airways direct
06 Sep - 26 Sep Air Serbia
13 Sep - 20 Sep Air Serbia
27 Sep - 04 Oct Air Serbia
25 Sep - 29 Sep British Airways direct
01 Sep - 01 Oct British Airways direct
28 Sep - 07 Oct British Airways direct
27 Sep - 04 Oct British Airways direct
28 Sep - 04 Oct British Airways direct

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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