Cheapest return flights from Seattle to Istanbul in April from $581

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

Return flights

15 Apr - 05 May Lufthansa
18 Apr - 26 Apr Air Canada
01 Apr - 15 Apr Lufthansa
24 Apr - 04 May KLM
12 Apr - 19 Apr KLM
15 Apr - 05 May Turkish Airlines direct
03 Apr - 14 Apr Air Canada
04 Apr - 18 Apr Air France
10 Apr - 18 Apr KLM
03 Apr - 10 Apr Air Canada
01 Apr - 15 Apr Turkish Airlines direct
24 Apr - 04 May Turkish Airlines direct
03 Apr - 13 Apr Air Canada
18 Apr - 26 Apr Turkish Airlines direct
29 Apr - 16 May Delta

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

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