Cheapest return flights from Seattle to Istanbul in April from 648€

Best time to book flights for Seattle (SEA) to Istanbul (IST) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Istanbul (IST) in April 2025 (see full year).

Return flights

02 Apr - 09 Apr Delta
01 Apr - 08 Apr Delta
23 Apr - 07 May Icelandair
26 Apr - 10 May Alaska Airlines
24 Apr - 30 Apr Icelandair
25 Apr - 03 May Icelandair
24 Apr - 05 May Icelandair
02 Apr - 07 Apr Frontier Airlines
01 Apr - 15 Apr Icelandair
17 Apr - 24 Apr Icelandair
01 Apr - 16 Apr Delta
02 Apr - 16 Apr Lufthansa
02 Apr - 24 Apr WestJet
01 Apr - 08 Apr Turkish Airlines direct
23 Apr - 07 May Turkish Airlines direct
24 Apr - 05 May Turkish Airlines direct
25 Apr - 03 May Turkish Airlines direct
26 Apr - 10 May Turkish Airlines direct

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

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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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