Cheapest return flights from Seattle to Istanbul in April from $571

AirHint found the following cheapest return flights from Seattle (SEA) to Istanbul (IST) in April 2026 (see full year).

Return flights

29 Apr - 13 May Scandinavian Airlines
29 Apr - 07 May Scandinavian Airlines
08 Apr - 15 Apr Scandinavian Airlines
19 Apr - 05 May Delta
06 Apr - 02 May Air France
02 Apr - 16 Apr Lufthansa
10 Apr - 17 Apr Air France
02 Apr - 16 Apr Turkish Airlines direct
08 Apr - 15 Apr Turkish Airlines direct
10 Apr - 17 Apr Turkish Airlines direct
29 Apr - 13 May Turkish Airlines direct
06 Apr - 02 May Turkish Airlines direct

Also check the deals for one-way flights from Seattle to Istanbul in April.

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