$379 Find Cheap Flights from Oslo to Seattle - Compare and Save

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Everything you should know

Cheapest round-trip
$520
Typical prices: $589-$882
Icelandair
Mon 11/12Sun 11/25
OSL - SEA • 1 stop
Cheapest one-way
$379
Typical prices: $485-$879
Icelandair
Sat 12/15
OSL - SEA • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Oslo and Seattle. You'll need to take a connecting flight to reach the destination.
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Top routes
OSL - SEA
Cheapest • 19% average savings
TRF - SEA
Most popular
Insights
Insights
When to book
20 weeks
in advance
Our data shows that travelers who book at least 20 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 28% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Helsinki-Vantaa (HEL)
Cheapest • Avg $649 (round-trip)
Reykjavik Keflavik Intl (KEF)
Shortest trip • 12h 54m (one-way)
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Insights
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Flight Deals

Cheap Flights from Oslo to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Oslo to Seattle

Thu, Nov 12 - Wed, Nov 25
Icelandair Logo
1:10 pm - 5:00 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 8:35 pmSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
21h 00m1 stop Reykjavik Keflavik Intl
$520Icelandair
Thu, Nov 12 - Wed, Nov 25
Icelandair Logo
1:10 pm - 5:00 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 8:35 pmSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
21h 00m1 stop Reykjavik Keflavik Intl
$533Icelandair
Thu, Nov 12 - Wed, Nov 25
Icelandair Logo
1:10 pm - 5:00 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 8:35 pmSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
21h 00m1 stop Reykjavik Keflavik Intl
$535Icelandair
Thu, Nov 12 - Wed, Nov 25
Multiple Airlines Logo
6:15 am - 1:50 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
16h 35m1 stop Paris Charles de Gaulle
Multiple Airlines Logo
9:40 am - 11:45 amSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
17h 05m2 stops Portland Amsterdam Schiphol
$546Multiple Airlines
Mon, Mar 8 - Wed, Apr 7
Icelandair Logo
1:10 pm - 5:00 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:00 pm - 12:35 pmSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
32h 35m1 stop Reykjavik Keflavik Intl
$548Icelandair
Thu, Nov 12 - Wed, Nov 25
Multiple Airlines Logo
6:15 am - 1:50 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
16h 35m1 stop Paris Charles de Gaulle
Multiple Airlines Logo
9:40 am - 11:45 amSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
17h 05m2 stops Portland Amsterdam Schiphol
$567Multiple Airlines
Thu, Nov 12 - Wed, Nov 25
KLM Logo
6:05 am - 11:47 amOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
14h 42m1 stop Amsterdam Schiphol
KLM Logo
2:05 pm - 4:10 pmSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
17h 05m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
$583KLM
Wed, Dec 9 - Wed, Dec 16
Scandinavian Airlines Logo
5:55 am - 8:24 pmOSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
23h 29m2 stops Kastrup Copenhagen San Francisco
Scandinavian Airlines Logo
3:21 pm - 5:55 pmSEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
17h 34m2 stops Los Angeles Kastrup Copenhagen
$766Scandinavian Airlines
Thu, Jan 21 - Mon, Jan 25
Scandinavian Airlines Logo
2:35 pm - 10:05 pmTRF  Oslo Sandefjord-SEA Seattle/Tacoma Intl
40h 30m2 stops Kastrup Copenhagen Los Angeles
Scandinavian Airlines Logo
7:15 am - 2:05 pmSEA  Seattle/Tacoma Intl-TRF Oslo Sandefjord
21h 50m2 stops Chicago O'Hare Intl Kastrup Copenhagen
$775Scandinavian Airlines
Thu, Jan 21 - Mon, Jan 25
Scandinavian Airlines Logo
2:35 pm - 10:05 pmTRF  Oslo Sandefjord-SEA Seattle/Tacoma Intl
40h 30m2 stops Kastrup Copenhagen Los Angeles
Scandinavian Airlines Logo
7:15 am - 2:05 pmSEA  Seattle/Tacoma Intl-TRF Oslo Sandefjord
21h 50m2 stops Chicago O'Hare Intl Kastrup Copenhagen
$797Scandinavian Airlines
Booking Insights

Price, demand and travel trends for Oslo to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Oslo to Seattle?

Round-trip flights from Oslo to Seattle typically range from $589 to $882. The lowest price found in the past 5 days was $520, on Icelandair.

What's the cheapest day of the week to fly from Oslo to Seattle?

Based on deals KAYAK users found in the last 12 months, Friday is the cheapest day of the week to fly from Oslo to Seattle. It’s 8% cheaper than the average day, while Thursday is the most expensive, with prices 10% higher.

What’s the cheapest month to fly from Oslo to Seattle?

•February is the cheapest month to fly from Oslo to Seattle at $509 round-trip.
•December ($881) and June ($810) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 73% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Oslo to Seattle the cheapest?

Flights from Oslo to Seattle are cheapest 20 weeks before departure. Booking in this window typically costs about 27% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Oslo to Seattle flights

Low season

January

Cheapest flight

$379
Beat the crowds with an average 43% drop in travelers.
The most popular month to fly with an average 107% increase in travelers.
One-way flight from Oslo Gardermoen Airport to Seattle

When to book flights from Oslo to Seattle

Are your dates flexible? Find out the best times to travel from Oslo to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Oslo to Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Oslo to Seattle?

    Two cabin classes are available on flights from Oslo to Seattle:

    • Economy Class
    • Business Class

  • How long is a flight from Oslo to Seattle?

    A nonstop flight from Oslo to Seattle takes 00m, covering 4,560 miles.

  • Do I need a passport to fly from Oslo to Seattle?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Oslo to Seattle flight?

    Round-trip flights from Oslo to Seattle range from $589 to $882, with an average of $709 over the past 12 months. Anything below $589 counts as a good deal.

  • How expensive are last-minute Oslo to Seattle flights?

    Last-minute fares on this route (booked within two weeks of departure) run 17% above the $709 route average. Book 20 weeks before departure for the lowest fares.

  • How are flight prices from Oslo to Seattle looking right now?

    One-way fares from Oslo to Seattle are currently lower than usual. Average one-way flight prices are about $454, which is 28% below the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging $61 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

  • Which airports can I use when flying from Oslo to Seattle?

    Flights from Oslo to Seattle may depart from several airports in Oslo area, including Oslo Gardermoen (OSL) and Oslo Sandefjord (TRF). Flights usually arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Oslo to Seattle pass through?

    One-stop flights from Oslo to Seattle most commonly connect through:

    • Reykjavik Keflavik Intl (KEF) - 53% of one-stop connections
    • Amsterdam Schiphol (AMS) - 13% of one-stop connections
    • Kastrup Copenhagen (CPH) - 12% of one-stop connections
    • Munich Franz Josef Strauss (MUC) - 8% of one-stop connections

  • Can I save money by using flexible dates for flights from Oslo to Seattle?

    Yes. Flexible dates can save you up to 17% on flights from Oslo to Seattle. Friday is the cheapest departure day at $653 round-trip on average, while Thursday is the most expensive at $782, a difference of $129.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Oslo to Seattle?

    Flying via Reykjavik Keflavik Intl (KEF) gives the shortest average 1-stop total travel time at 12h 54m, compared with 13h 14m via Kastrup Copenhagen (CPH) and 14h 31m via Helsinki-Vantaa (HEL).

  • What is the time difference between Oslo and Seattle?

    Seattle is 8 hours behind Oslo (Pacific Time vs Central European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

Your guide to booking Oslo to Seattle flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Friday departure and avoid flying on Thursday. On this route, Friday flights average $653, about $129 less than Thursday fares (16% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 20 weeks before you fly. On this route, that window historically saves about 27% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Oslo to Seattle trip for February. Fares historically average $509 round-trip in that month - typically $372 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Oslo to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Car rentals in Seattle
Hotels in Seattle
Vacations in Seattle