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 6 hours ago
Great Availability
67% of dates checked are available within 10% of the lowest price

Tuesday, July 21st, 2026

8 round-trip options

Returning
Sun, Jul 26, 2026•5 Day Trip
$845 USD
Google Flights
Returning
Mon, Jul 27, 2026•6 Day Trip
$845 USD
Google Flights
Returning
Wed, Jul 29, 2026•8 Day Trip
$845 USD
Google Flights
Returning
Fri, Jul 31, 2026•10 Day Trip
$845 USD
Google Flights
Returning
Sat, Aug 1, 2026•11 Day Trip
$845 USD
Google Flights
Returning
Sun, Aug 2, 2026•12 Day Trip
$787 USD
Google Flights
Returning
Mon, Aug 3, 2026•13 Day Trip
$845 USD
Google Flights
Returning
Tue, Aug 4, 2026•14 Day Trip
$734 USD
Google Flights