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

Monday, September 28th, 2026

8 round-trip options

Returning
Sun, Oct 4, 2026•6 Day Trip
$664 USD
Google Flights
Returning
Mon, Oct 5, 2026•7 Day Trip
$645 USD
Google Flights
Returning
Tue, Oct 6, 2026•8 Day Trip
$645 USD
Google Flights
Returning
Wed, Oct 7, 2026•9 Day Trip
$645 USD
Google Flights
Returning
Fri, Oct 9, 2026•11 Day Trip
$686 USD
Google Flights
Returning
Sat, Oct 10, 2026•12 Day Trip
$705 USD
Google Flights
Returning
Sun, Oct 11, 2026•13 Day Trip
$646 USD
Google Flights
Returning
Mon, Oct 12, 2026•14 Day Trip
$650 USD
Google Flights