Oslo (OSL) to Seattle / Tacoma (SEA) flight deal from $494 USD in economy class

AAAmerican Airlines

AYFinnair

BABritish Airways

Round Trip•Economy

OSL

Oslo Airport, Gardermoen

Oslo, Norway

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$838 USD

-41%$494 USD

Verified Nov 3, 2025 at 8:58 PM

December 2025

Today

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1$685 2$530 3$578 4$765 5$746 6$539 7$687 8$716 9$580 10$667 11$747 12$955 13$998 14$873 15$905 16$833 17$857 18$911 19$1,628 20$1,278 21$1,219 22$856 23$798 24$813 25$682 26$871 27$946 28$799 29$813 30$694 31$1,183 1 2 3 4

Fair Availability

26% of dates checked are available within 10% of the lowest price

Thursday, December 18th, 2025

10 round-trip options

Returning

Tue, Dec 23, 2025•5 Day Trip

$911 USD

Google Flights

Returning

Wed, Dec 24, 2025•6 Day Trip

$1,268 USD

Google Flights

Returning

Thu, Dec 25, 2025•7 Day Trip

$1,139 USD

Google Flights

Returning

Fri, Dec 26, 2025•8 Day Trip

$1,099 USD

Google Flights

Returning

Sat, Dec 27, 2025•9 Day Trip

$1,041 USD

Google Flights

Returning

Sun, Dec 28, 2025•10 Day Trip

$990 USD

Google Flights

Returning

Mon, Dec 29, 2025•11 Day Trip

$960 USD

Google Flights

Returning

Tue, Dec 30, 2025•12 Day Trip

$1,001 USD

Google Flights

Returning

Wed, Dec 31, 2025•13 Day Trip

$1,001 USD

Google Flights

Returning

Thu, Jan 1, 2026•14 Day Trip

$1,001 USD

Google Flights