Cheapest return flights from Seattle to Oslo in March from $400

AirHint found the following cheapest return flights from Seattle (SEA) to Oslo (OSL) in March 2026 (see full year).

Return flights

29 Mar - 05 Apr Icelandair
29 Mar - 14 Apr Icelandair
11 Mar - 18 Mar Delta
04 Mar - 11 Mar Air France
01 Mar - 07 Mar Air France
06 Mar - 17 Mar Lufthansa
27 Mar - 05 Apr Lufthansa
06 Mar - 16 Mar Lufthansa
05 Mar - 14 Mar Delta
07 Mar - 17 Mar Brussels Airlines
07 Mar - 16 Mar Brussels Airlines
06 Mar - 14 Mar Lufthansa
06 Mar - 15 Mar Lufthansa

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

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