AirHint found the following cheapest return flights from San Francisco (SFO) to Istanbul (IST) in May 2026 (see full year).

Return flights

04 May - 18 May	Air Canada
01 May - 15 May	Scandinavian Airlines
21 May - 31 May	Air France
04 May - 10 May	Scandinavian Airlines
23 May - 30 May	Air France
28 May - 30 Jun	Air France
31 May - 14 Jun	Air Canada
21 May - 31 May	Turkish Airlines	direct
23 May - 30 May	Turkish Airlines	direct
01 May - 15 May	Turkish Airlines	direct
04 May - 10 May	Turkish Airlines	direct
04 May - 18 May	Turkish Airlines	direct
28 May - 30 Jun	Turkish Airlines	direct
31 May - 14 Jun	Turkish Airlines	direct

Also check the deals for one-way flights from San Francisco to Istanbul in May.

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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Cheapest return flights from San Francisco to Istanbul in May from $739

Return flights