HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$339+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Jun 24 — Jul 11
Wed 6/24
Wed 7/1
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.

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 May 25, 2026.

This Ticket deal was found by Cheapflights users on 5/22. 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 6/64:30 pm
OSL
-
SEA
1 stop13h 10m
Icelandair
Mon 6/227:00 pm
SEA
-
OSL
1 stop11h 25m
Icelandair
Deal found 5/22$618
This Ticket deal was found by Cheapflights users on 5/24. 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 6/136:15 am
OSL
-
SEA
1 stop15h 05m
Lufthansa
Sun 6/286:50 pm
SEA
-
OSL
1 stop18h 15m
Lufthansa
Deal found 5/24$619
This Ticket deal was found by Cheapflights users on 5/25. 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 6/149:55 am
OSL
-
SEA
2 stops17h 35m
Lufthansa
Tue 6/308:15 am
SEA
-
OSL
2 stops19h 00m
Lufthansa
Deal found 5/25$645
This Delta deal was found by Cheapflights users on 5/23. 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.
Sat 6/611:50 am
OSL
-
SEA
2 stops19h 32m
Delta
Mon 6/2210:05 pm
SEA
-
OSL
1 stop13h 35m
Delta
Deal found 5/23$646
This Travelis deal was found by Cheapflights users on 5/24. 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.
Sat 6/135:35 am
OSL
-
SEA
2 stops21h 55m
Multiple Airlines
Sun 6/286:50 pm
SEA
-
OSL
1 stop18h 15m
Multiple Airlines
Deal found 5/24$656
This United Airlines deal was found by Cheapflights users on 5/23. 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.
Tue 7/216:55 am
OSL
-
SEA
2 stops35h 45m
United Airlines
Tue 7/281:55 pm
SEA
-
OSL
2 stops42h 20m
United Airlines
Deal found 5/23$658
This Delta deal was found by Cheapflights users on 5/24. 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.
Sun 6/711:50 am
OSL
-
SEA
2 stops20h 18m
Delta
Mon 6/2210:05 pm
SEA
-
OSL
1 stop13h 35m
Delta
Deal found 5/24$659
This United Airlines deal was found by Cheapflights users on 5/25. 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.
Sun 6/147:10 am
OSL
-
SEA
1 stop18h 49m
United Airlines
Tue 6/306:50 pm
SEA
-
OSL
1 stop18h 15m
United Airlines
Deal found 5/25$661
This Air Canada deal was found by Cheapflights users on 5/22. 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 6/67:15 am
OSL
-
SEA
2 stops22h 53m
Multiple Airlines
Mon 6/223:00 pm
SEA
-
OSL
2 stops17h 55m
Multiple Airlines
Deal found 5/22$671
This Travelis deal was found by Cheapflights users on 5/24. 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.
Sun 6/75:35 am
OSL
-
SEA
2 stops21h 55m
Multiple Airlines
Mon 6/221:51 pm
SEA
-
OSL
2 stops19h 29m
Multiple Airlines
Deal found 5/24$675
This Scandinavian Airlines deal was found by Cheapflights users on 5/24. 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.
Wed 10/146:00 am
TRF
-
SEA
2 stops23h 48m
Scandinavian Airlines
Sun 10/1811:10 am
SEA
-
TRF
2 stops28h 15m
Scandinavian Airlines
Deal found 5/24$709
This Travelis deal was found by Cheapflights users on 5/24. 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.
Sat 6/133:30 pm
TRF
-
SEA
2 stops29h 50m
Lufthansa
Sun 6/282:10 pm
SEA
-
TRF
2 stops22h 00m
Lufthansa
Deal found 5/24$945

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 May 25, 2026.

Round-trip from

$618
(Ticket)

One-way from

$339
(Travelis)

Popular in

July

Cheapest in

October

Average price

$594
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. 12% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 25, 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

Sun 6/7

4:30 pm-11:45 am

1 stop28h 15m

Seattle/Tacoma Intl

Mon 6/22

7:00 pm-3:25 pm

1 stop11h 25m

$618

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 6/14

9:55 am-6:30 pm

2 stops17h 35m

Seattle/Tacoma Intl

Tue 6/30

8:15 am-12:15 pm

2 stops19h 00m

$645

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 6/13

5:35 am-6:30 pm

2 stops21h 55m

Seattle/Tacoma Intl

Sun 6/28

6:50 pm-10:05 pm

1 stop18h 15m

$656
Quickest round-trip

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 6/7

11:50 am-11:08 pm

2 stops20h 18m

Seattle/Tacoma Intl

Mon 6/22

10:05 pm-8:40 pm

1 stop13h 35m

$659

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 7/21

6:55 am-9:40 am

2 stops35h 45m

Seattle/Tacoma Intl

Tue 7/28

6:50 pm-10:05 pm

1 stop18h 15m

$698

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 6/14

7:10 am-4:59 pm

1 stop18h 49m

Seattle/Tacoma Intl

Tue 6/30

6:50 pm-10:05 pm

1 stop18h 15m

$704

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Wed 10/14

6:00 am-8:48 pm

2 stops23h 48m

Seattle/Tacoma Intl

Sun 10/18

7:20 am-12:25 am

2 stops32h 05m

$709

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 7/16

6:45 am-7:06 pm

2 stops21h 21m

Seattle/Tacoma Intl

Mon 8/3

1:55 pm-12:15 am

2 stops25h 20m

$731

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 7/7

6:45 pm-4:59 pm

1 stop31h 14m

Seattle/Tacoma Intl

Tue 7/14

6:50 pm-10:05 pm

1 stop18h 15m

$750

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 7/7

9:20 am-8:36 pm

2 stops20h 16m

Seattle/Tacoma Intl

Tue 7/14

7:20 am-11:05 am

2 stops18h 45m

$786

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/24

Showing 1-10 of 36 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 $484). 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 May 25, 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
1,790 reviews

Food

6.7

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Overall

7.4

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Scandinavian Airlines
7.4
Good
1,790 reviews
Scandinavian Airlines
7.4
Good
1,790 reviews

Food

6.7

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Overall

7.4

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Icelandair
7.0
Good
657 reviews
Scandinavian Airlines
7.4
Good
1,790 reviews

Food

6.7

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Overall

7.4

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.

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 Icelandair, Lufthansa, and United Airlines fly from Oslo to Seattle in about 17h 35m. The time it takes to get you to your destination can typically vary by up to 18h 10m. 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 28% 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 $268 on Finnair. Other airlines that offer cheap prices include American Airlines from $275 and British Airways from $300 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 $484). 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
Ocean Shores
Olympia
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
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.

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 May 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$443Average$649FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$588Average$757FlexibilityNo 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.