HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$276+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oslo to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Oslo to Seattle/Tacoma Intl are usually found in November or October, booked 61 days in advance, depart on a Saturday or Friday and return on a Tuesday

Cheap 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 September 16, 2025.

Round-trip from

$402
(Ticket)

One-way from

$276
(Finnair)

Popular in

July

Cheapest in

November

Average price

$547
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. 14% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 September 16, 2025.

This Ticket deal was found by Cheapflights users on 9/14. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/64:45 pmOSL - SEA
1 stop12h 55mIcelandair
Sun 10/197:00 pmSEA - OSL
1 stop32h 35mIcelandair
Deal found 9/14$404
This Ticket deal was found by Cheapflights users on 9/15. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/244:30 pmOSL - SEA
1 stop13h 10mIcelandair
Sat 9/273:45 pmSEA - OSL
1 stop11h 50mIcelandair
Deal found 9/15$418
This Ticket deal was found by Cheapflights users on 9/16. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/66:45 amOSL - SEA
2 stops22h 59mMultiple Airlines
Sun 10/196:50 pmSEA - OSL
1 stop14h 15mMultiple Airlines
Deal found 9/16$444
This Ticket deal was found by Cheapflights users on 9/15. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/46:35 amOSL - SEA
1 stop14h 20mLufthansa
Wed 10/152:20 pmSEA - OSL
1 stop12h 55mLufthansa
Deal found 9/15$448
This Travelis deal was found by Cheapflights users on 9/16. 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.
Fri 12/267:10 amOSL - SEA
1 stop18h 45mBritish Airways
Sat 1/106:50 pmSEA - OSL
1 stop19h 10mBritish Airways
Deal found 9/16$451
This Ticket deal was found by Cheapflights users on 9/15. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/246:05 amOSL - SEA
1 stop20h 35mMultiple Airlines
Thu 10/25:40 pmSEA - OSL
1 stop13h 40mMultiple Airlines
Deal found 9/15$454
This Ticket deal was found by Cheapflights users on 9/15. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/263:05 pmOSL - SEA
2 stops36h 24mBritish Airways
Sat 11/81:35 pmSEA - OSL
1 stop24h 25mBritish Airways
Deal found 9/15$459
This Ticket deal was found by Cheapflights users on 9/14. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/68:00 amOSL - SEA
2 stops20h 29mBritish Airways
Sun 10/1910:39 amSEA - OSL
2 stops28h 01mBritish Airways
Deal found 9/14$460
This Icelandair deal was found by Cheapflights users on 9/15. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/64:45 pmOSL - SEA
1 stop12h 55mIcelandair
Sat 10/183:45 pmSEA - OSL
1 stop11h 50mIcelandair
Deal found 9/15$461
This Trip.com deal was found by Cheapflights users on 9/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/64:45 pmTRF - SEA
2 stops28h 05mKLM
Sun 10/192:00 pmSEA - TRF
2 stops22h 10mKLM
Deal found 9/14$653
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 9/252:55 pmTRF - SEA
1 stop32h 05mScandinavian Airlines
Sun 10/54:20 pmSEA - TRF
1 stop13h 00mScandinavian Airlines
Deal found 9/15$658
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 9/252:55 pmTRF - SEA
1 stop32h 05mScandinavian Airlines
Wed 10/14:20 pmSEA - TRF
1 stop13h 00mScandinavian Airlines
Deal found 9/15$714

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 September 16, 2025.
Use the filters below to find and compare flights from Oslo to Seattle that are best for you.

Fly from

Oslo

Fly to

Seattle

Route

Depart

Return

Price

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 10/6

5:05 pm-11:10 am

1 stop27h 05m

Seattle/Tacoma Intl

Sun 10/19

1:35 pm-11:40 pm

2 stops25h 05m

$449

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 1/28

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 1/29

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Wed 2/4

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 1/26

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Mon 2/2

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 1/29

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Thu 2/5

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

1:05 pm-5:00 pm

1 stop12h 55m

Seattle/Tacoma Intl

Fri 2/6

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 1/28

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 1/27

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 1/29

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-11:35 am

1 stop12h 00m

$460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 1/26

11:35 am-4:55 pm

1 stop14h 20m

Seattle/Tacoma Intl

Wed 2/4

2:05 pm-10:40 pm

2 stops23h 35m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 29 results
1
2
3

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

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

Use this chart to determine the optimal time to book a round-trip flight from Oslo to Seattle. Price data was last updated on September 12, 2025.

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 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Oslo to Seattle (average of $238). Flying from Oslo to Seattle in June is currently the most expensive (average of $387). 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.

What is the cheapest time of day to fly from OSL to SEA?

Find hourly flight availability from Oslo to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s typically best to fly out from Oslo to Seattle at noon. Doing so could potentially save you 20% on the flight price compared to flying in the morning, which is usually more expensive.

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 September 16, 2025.
Get a feel of what it's like to fly with Delta, 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.
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Scandinavian Airlines
7.4
Good
1,486 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Icelandair
7.0
Good
544 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Lufthansa
6.8
Okay
7,407 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
British Airways
6.7
Okay
7,363 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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 6 different airlines.

  • How long is the flight from Oslo to Seattle?

    Airlines like British Airways, Icelandair, and KLM fly from Oslo to Seattle in about 12h 50m. The time it takes to get you to your destination can typically vary by up to 15h 15m. 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 $399. Other airlines that can offer you cheap pricing are American Airlines, from $416, and British Airways, from $419. Users have found that Icelandair is 31% cheaper than the other options available to this destination.

  • 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, January is the cheapest month in which you can book a flight from Oslo to Seattle (average of $238). Flying from Oslo to Seattle in June is currently the most expensive (average of $387). 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
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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.

Alternative routes for Oslo to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Oslo Gardermoen to Seattle flights
Sandefjord to Seattle flights
Oslo Gardermoen to Portland flights
Sandefjord to Portland flights
Stavanger to Portland flights

Top 6 airlines flying from Oslo to Seattle

Discover the top 6 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$399Average$538FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$416Average$490FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$419Average$600FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$423Average$558FlexibilityNo cancel feeOn-time76%
DeltaCheapest$452Average$525FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$603Average$703FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.