Cheapest return flights from Seattle to Madrid in April from 553€

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

Return flights

24 Apr - 03 May Icelandair
15 Apr - 22 Apr Turkish Airlines
06 Apr - 21 Apr Turkish Airlines
15 Apr - 03 May Icelandair
21 Apr - 08 May Turkish Airlines
13 Apr - 16 Apr Icelandair
21 Apr - 26 Apr Icelandair
17 Apr - 26 Apr Icelandair
02 Apr - 18 Apr Condor
02 Apr - 12 Apr Lufthansa

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

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