Cheapest return SFO–IST flights, May

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

Return flights

03 May - 10 May Condor
12 May - 02 Jun Lufthansa
06 May - 14 May KLM
05 May - 12 May KLM
18 May - 08 Jun Lufthansa
11 May - 26 May KLM
03 May - 11 May Condor
12 May - 19 May KLM
14 May - 21 May KLM
12 May - 22 Jun Lufthansa
11 May - 19 May SWISS
08 May - 15 May KLM
18 May - 17 Jun Lufthansa
28 May - 04 Jun KLM
13 May - 01 Jun KLM
27 May - 24 Jun Air France
12 May - 21 Jun Air France
28 May - 10 Jun KLM
28 May - 05 Jun KLM
10 May - 17 May SWISS

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

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