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$379+ Cheap flights from Oslo to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Aug 8 — Aug 151
Sat 8/8
Sat 8/15
1 adult, Economy
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Cheap flight deals from Oslo to Seattle

Cheapest flights from Oslo to Seattle
Explore the most affordable flight options available from Oslo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2026.

This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:15 am
OSL
-
SEA
2 stops36h 25m
United Airlines
Sun 11/152:50 pm
SEA
-
OSL
1 stop17h 50m
United Airlines
Deal found 7/9$643
This Travelis deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:35 am
OSL
-
SEA
1 stop16h 25m
Finnair
Wed 9/161:40 pm
SEA
-
OSL
2 stops17h 55m
Finnair
Deal found 7/8$647
This Cheapflightsfares deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:15 am
OSL
-
SEA
1 stop14h 40m
Lufthansa
Mon 9/282:10 pm
SEA
-
OSL
1 stop19h 10m
Lufthansa
Deal found 7/9$648
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:30 am
OSL
-
SEA
1 stop18h 57m
Delta
Mon 2/84:50 pm
SEA
-
OSL
1 stop17h 00m
Delta
Deal found 7/8$649
This American Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:50 pm
OSL
-
SEA
1 stop12h 10m
American Airlines
Wed 9/163:42 pm
SEA
-
OSL
2 stops18h 33m
American Airlines
Deal found 7/8$650
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:45 am
OSL
-
SEA
1 stop14h 10m
United Airlines
Wed 9/166:50 pm
SEA
-
OSL
1 stop18h 15m
United Airlines
Deal found 7/8$663
This Travelocity deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am
TRF
-
SEA
2 stops25h 04m
Scandinavian Airlines
Tue 12/111:10 am
SEA
-
TRF
2 stops17h 55m
Scandinavian Airlines
Deal found 7/5$668
This Air Canada deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:15 am
OSL
-
SEA
2 stops23h 44m
Air Canada
Sun 11/158:40 am
SEA
-
OSL
2 stops24h 00m
Air Canada
Deal found 7/9$669
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:15 am
OSL
-
SEA
2 stops24h 21m
United Airlines
Sat 8/2212:10 pm
SEA
-
OSL
3 stops44h 05m
United Airlines
Deal found 7/8$672
This Scandinavian Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:00 am
TRF
-
SEA
2 stops25h 12m
Scandinavian Airlines
Mon 11/1611:10 am
SEA
-
TRF
2 stops28h 20m
Scandinavian Airlines
Deal found 7/4$676
This Delta deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2012:35 pm
OSL
-
SEA
1 stop32h 12m
Delta
Sun 11/299:20 am
SEA
-
OSL
2 stops21h 50m
Delta
Deal found 7/5$679
This Flysmarter deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:00 am
TRF
-
SEA
1 stop16h 45m
Scandinavian Airlines
Thu 9/39:10 am
SEA
-
TRF
2 stops20h 20m
Scandinavian Airlines
Deal found 7/7$682

Find flight deals from Oslo to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Oslo (OS1) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 9, 2026.

Round-trip from

$647
(Travelis)

One-way from

$379
(ResecentrumGruppen)

Popular in

June

Cheapest in

October

Average price

$788
From Oslo to Seattle/Tacoma Intl
Search Deals
One-way flight from Oslo to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oslo to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 9, 2026.
Use the filters below to find and compare flights from Oslo to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 8/31

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Wed 9/16

6:50 pm-10:05 pm

1 stop18h 15m

$663

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 8/15

6:15 am-9:36 pm

2 stops24h 21m

Seattle/Tacoma Intl

Sat 8/22

5:13 pm-2:50 pm

2 stops36h 37m

$668

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 11/14

6:15 am-8:59 pm

2 stops23h 44m

Seattle/Tacoma Intl

Sun 11/15

8:40 am-5:40 pm

2 stops24h 00m

$669

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 11/20

12:35 pm-11:47 am

1 stop32h 12m

Seattle/Tacoma Intl

Sun 11/29

9:20 am-4:10 pm

2 stops21h 50m

$679

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Sat 8/22

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Thu 9/3

9:10 am-2:30 pm

2 stops20h 20m

$682

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Sat 9/19

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Mon 9/28

9:00 am-2:30 pm

2 stops20h 30m

$686

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 8/31

7:15 pm-11:47 am

1 stop25h 32m

Seattle/Tacoma Intl

Wed 9/16

7:15 am-8:45 am

2 stops16h 30m

$739

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Tue 8/25

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Mon 2/8

7:20 am-2:05 pm

2 stops21h 45m

$746

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 11/18

1:10 pm-11:37 am

2 stops31h 27m

Seattle/Tacoma Intl

Sat 11/28

2:35 pm-8:35 pm

1 stop21h 00m

$789
Quickest round-trip

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 10/20

1:50 pm-5:55 pm

1 stop13h 05m

Seattle/Tacoma Intl

Thu 10/22

7:00 pm-3:25 pm

1 stop11h 25m

$859

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/5

Showing 1-10 of 32 resultsSorted by cheapest first
1
2
3
4

Best time to book a flight from Oslo to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Oslo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Oslo to Seattle

What is the cheapest month to book a flight from Oslo to Seattle?

Currently, November is the cheapest month in which you can book a flight from Oslo to Seattle (average of $301). Flying from Oslo to Seattle in June is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Oslo to Seattle?

How far ahead should I book a flight from Oslo to Seattle?

The price you pay for your flight from Oslo to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 68 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 9, 2026.
Get a feel of what it's like to fly with Scandinavian Airlines and Icelandair from Oslo to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Scandinavian Airlines
7.4
Good
1,873 reviews

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.0

Entertainment

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.
Scandinavian Airlines
7.4
Good
1,873 reviews
Scandinavian Airlines
7.4
Good
1,873 reviews

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.0

Entertainment

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.
Icelandair
7.0
Good
702 reviews
Scandinavian Airlines
7.4
Good
1,873 reviews

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.0

Entertainment

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

Related info for your journey

Find useful and relevant information for your journey from Oslo to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Oslo?

    If you book a flight to Seattle from Oslo, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Oslo to Seattle/Tacoma Intl per day from 2 different airlines.

  • How long is the flight from Oslo to Seattle?

    Airlines like United Airlines, Air Canada, and Delta fly from Oslo to Seattle in about 14h 10m. The time it takes to get you to your destination can typically vary by up to 18h 02m. There are 4551 mi between Oslo and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Oslo to Seattle round-trip?

    Cheapflights users have booked flights from Oslo to Seattle round-trip from $443. Another airline that can offer you cheap pricing is Scandinavian Airlines. Users have found that Icelandair is 30% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Oslo to Seattle one-way?

    One-way options have recently been found by users for as low as $337 on British Airways. Other airlines that offer cheap prices include American Airlines from $364 and Icelandair from $463 one-way.

  • Can I find deals for flights from Oslo to Seattle that include hotel bookings?

    Yes. In addition to deals on Oslo to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oslo to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oslo to Seattle.

  • Can I find deals for business class flights from Oslo to Seattle?

    Yes. Cheapflights offers flight deals from Oslo to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Oslo to Seattle?

    Currently, November is the cheapest month in which you can book a flight from Oslo to Seattle (average of $301). Flying from Oslo to Seattle in June is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Lacey
Leavenworth
Olympia
Ocean Shores
Edmonds
Snoqualmie
Tumwater
Tukwila
Renton
Kent
Lynnwood
Ellensburg
Fife
Marysville
Lakewood
Issaquah
Shoreline
Centralia

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Oslo to Seattle

Discover the top 2 airlines that operate flights from Oslo to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$443Average$623FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$588Average$797FlexibilityNo cancel feeOn-time77%

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