Cheapest return flights from London to Istanbul in September from $334

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

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

Return flights

08 Sep - 18 Sep Lufthansa
09 Sep - 18 Sep Lufthansa
04 Sep - 18 Sep Lufthansa
15 Sep - 25 Sep Lufthansa
17 Sep - 25 Sep Lufthansa
18 Sep - 23 Sep Lufthansa
10 Sep - 15 Sep Lufthansa
09 Sep - 15 Sep Lufthansa
01 Sep - 15 Sep Lufthansa
11 Sep - 15 Sep Lufthansa
23 Sep - 14 Oct Lufthansa
30 Sep - 06 Oct Lufthansa
26 Sep - 03 Oct Lufthansa
29 Sep - 03 Oct Lufthansa
25 Sep - 02 Oct Lufthansa
10 Sep - 10 Oct Lufthansa
15 Sep - 01 Oct Lufthansa
24 Sep - 01 Oct Lufthansa
22 Sep - 02 Oct KLM
18 Sep - 05 Oct KLM

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

Skyscanner

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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