Cheapest return flights from Oslo to Seattle in December from 420€

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

Return flights

08 Dec - 23 Dec British Airways
24 Dec - 04 Jan British Airways
24 Dec - 05 Jan British Airways
13 Dec - 27 Dec KLM
23 Dec - 04 Jan KLM
22 Dec - 04 Jan KLM
21 Dec - 04 Jan Air France
19 Dec - 05 Jan Lufthansa
18 Dec - 04 Jan Icelandair
19 Dec - 02 Jan Lufthansa
18 Dec - 02 Jan Lufthansa
19 Dec - 04 Jan KLM

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

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