Cheapest return flights from London to Istanbul in September from $162

Best time to book flights for London (STN) to Istanbul (IST) flights at AirHint

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

Return flights

17 Sep - 24 Sep Pegasus Airlines direct
01 Sep - 25 Sep Pegasus Airlines direct
18 Sep - 25 Sep Pegasus Airlines direct
14 Sep - 18 Sep Pegasus Airlines direct
05 Sep - 26 Sep Pegasus Airlines direct
04 Sep - 25 Sep Pegasus Airlines direct
21 Sep - 18 Oct Pegasus Airlines direct
09 Sep - 26 Sep Pegasus Airlines direct
23 Sep - 26 Sep Pegasus Airlines direct
27 Sep - 30 Sep Pegasus Airlines direct
25 Sep - 26 Sep Pegasus Airlines direct
27 Sep - 01 Oct Pegasus Airlines direct
30 Sep - 02 Oct Pegasus Airlines direct
30 Sep - 03 Oct Pegasus Airlines direct
30 Sep - 11 Oct Pegasus Airlines direct
29 Sep - 02 Oct Pegasus Airlines direct
28 Sep - 01 Oct Pegasus Airlines direct
21 Sep - 08 Oct Pegasus Airlines direct
23 Sep - 07 Oct Pegasus Airlines direct
26 Sep - 05 Oct Pegasus Airlines 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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