Cheapest return flights from San Francisco to Istanbul in September from 609€

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

Return flights

22 Sep - 21 Oct Frontier Airlines
22 Sep - 08 Oct SWISS
29 Sep - 15 Oct Frontier Airlines
20 Sep - 26 Sep Frontier Airlines
27 Sep - 09 Oct Frontier Airlines
19 Sep - 26 Sep Frontier Airlines
20 Sep - 24 Sep Frontier Airlines
22 Sep - 24 Sep Frontier Airlines
30 Sep - 29 Oct Hawaiian Airlines
20 Sep - 28 Sep Frontier Airlines
22 Sep - 30 Sep Frontier Airlines
15 Sep - 22 Sep SWISS
21 Sep - 28 Sep Frontier Airlines
20 Sep - 27 Sep Frontier Airlines
21 Sep - 27 Sep Frontier Airlines
25 Sep - 03 Oct Frontier Airlines
20 Sep - 01 Oct Frontier Airlines
21 Sep - 01 Oct Frontier Airlines
28 Sep - 05 Oct Iberia
28 Sep - 18 Oct Iberia

Also check the deals for one-way flights from San Francisco 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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