Oslo (OSL) to Seattle / Tacoma (SEA) flight deal in economy from $639

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
Round Trip•Economy
NorwayOSL

Oslo Airport, Gardermoen

Oslo, Norway
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$739 USD
-14%$639 USD
Verified about 5 hours ago
Great Availability
67% of dates checked are available within 10% of the lowest price

Friday, December 18th, 2026

5 round-trip options

Returning
Wed, Dec 23, 2026•5 Day Trip
$1,258 USD
Google Flights
Returning
Thu, Dec 24, 2026•6 Day Trip
$1,258 USD
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Returning
Fri, Dec 25, 2026•7 Day Trip
$1,317 USD
Google Flights
Returning
Sun, Dec 27, 2026•9 Day Trip
$1,318 USD
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Returning
Mon, Dec 28, 2026•10 Day Trip
$1,318 USD
Google Flights