Cheapest return flights from Seattle to Amsterdam in December from $455

AirHint found the following cheapest return flights from Seattle (SEA) to Amsterdam (AMS) in December 2025 (see full year).

Return flights

05 Dec - 17 Jan Icelandair
07 Dec - 14 Dec Aer Lingus
28 Dec - 17 Jan Air France direct
28 Dec - 12 Jan Delta
30 Dec - 13 Jan Delta
11 Dec - 18 Dec United
11 Dec - 17 Dec Icelandair
07 Dec - 14 Dec Air France direct
05 Dec - 17 Jan Air France direct
01 Dec - 08 Dec Air France direct
09 Dec - 18 Dec United
12 Dec - 18 Dec Iberia
02 Dec - 27 Dec Icelandair
26 Dec - 31 Dec Aer Lingus
11 Dec - 03 Jan Frontier Airlines
20 Dec - 24 Dec Alaska Airlines
26 Dec - 01 Jan Alaska Airlines
26 Dec - 01 Jan Air France direct
26 Dec - 02 Jan Air France direct
27 Dec - 03 Jan Hawaiian Airlines

Also check the deals for one-way flights from Seattle to Amsterdam in December.

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