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$372+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
May 9 — May 161
Sat 5/9
Sat 5/16
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 April 9, 2026.

This Travelis deal was found by Cheapflights users on 4/6. 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.
Thu 4/161:50 pm
OSL
-
SEA
1 stop15h 50m
Icelandair
Thu 4/307:00 pm
SEA
-
OSL
1 stop32h 35m
Icelandair
Deal found 4/6$461
This Ticket deal was found by Cheapflights users on 4/9. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/231:50 pm
OSL
-
SEA
1 stop15h 50m
Icelandair
Thu 5/77:00 pm
SEA
-
OSL
1 stop32h 35m
Icelandair
Deal found 4/9$480
This Travelis deal was found by Cheapflights users on 4/7. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:50 pm
OSL
-
SEA
1 stop13h 05m
Icelandair
Wed 5/2011:25 pm
SEA
-
OSL
1 stop31h 00m
Icelandair
Deal found 4/7$484
This British Airways deal was found by Cheapflights users on 4/6. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:05 pm
OSL
-
SEA
1 stop24h 30m
British Airways
Wed 7/18:20 pm
SEA
-
OSL
1 stop18h 05m
British Airways
Deal found 4/6$531
This KLM deal was found by Cheapflights users on 4/5. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:15 pm
OSL
-
SEA
1 stop25h 27m
Multiple Airlines
Wed 5/276:40 pm
SEA
-
OSL
1 stop19h 40m
Multiple Airlines
Deal found 4/5$544
This American Airlines deal was found by Cheapflights users on 4/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2012:50 pm
OSL
-
SEA
2 stops20h 46m
American Airlines
Wed 5/278:20 pm
SEA
-
OSL
1 stop18h 05m
American Airlines
Deal found 4/5$547
This Delta deal was found by Cheapflights users on 4/5. 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.
Wed 5/206:30 am
OSL
-
SEA
1 stop14h 12m
Delta
Wed 5/2710:35 am
SEA
-
OSL
2 stops20h 45m
Delta
Deal found 4/5$548
This Delta deal was found by Cheapflights users on 4/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:50 am
OSL
-
SEA
1 stop13h 40m
Delta
Thu 5/710:35 am
SEA
-
OSL
2 stops20h 45m
Delta
Deal found 4/9$557
This Scandinavian Airlines deal was found by Cheapflights users on 4/5. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:05 pm
TRF
-
SEA
1 stop31h 40m
Scandinavian Airlines
Mon 9/282:30 pm
SEA
-
TRF
2 stops39h 00m
Scandinavian Airlines
Deal found 4/5$732
This Scandinavian Airlines deal was found by Cheapflights users on 4/7. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:00 am
TRF
-
SEA
2 stops25h 55m
Scandinavian Airlines
Mon 5/113:00 pm
SEA
-
TRF
2 stops38h 30m
Scandinavian Airlines
Deal found 4/7$759
This Ticket deal was found by Cheapflights users on 4/6. 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.
Fri 6/126:00 am
TRF
-
SEA
1 stop16h 45m
Scandinavian Airlines
Tue 6/303:55 pm
SEA
-
TRF
1 stop19h 30m
Scandinavian Airlines
Deal found 4/6$807
This Scandinavian Airlines deal was found by Cheapflights users on 4/6. 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 6/116:00 am
TRF
-
SEA
2 stops25h 19m
Scandinavian Airlines
Tue 6/303:55 pm
SEA
-
TRF
1 stop19h 30m
Scandinavian Airlines
Deal found 4/6$874

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 April 9, 2026.

Round-trip from

$480
(Ticket)

One-way from

$372
(Expedia)

Popular in

December

Cheapest in

October

Average price

$558
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. 4% potential increase in price ($31 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 April 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 April 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

Thu 4/23

11:50 am-4:30 pm

1 stop13h 40m

Seattle/Tacoma Intl

Thu 5/7

10:35 am-4:20 pm

2 stops20h 45m

$557

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 5/6

1:50 pm-5:55 pm

1 stop13h 05m

Seattle/Tacoma Intl

Sun 5/10

7:00 pm-12:35 pm

1 stop32h 35m

$609

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 5/7

8:35 am-10:38 pm

2 stops23h 03m

Seattle/Tacoma Intl

Wed 5/20

10:00 am-7:45 pm

2 stops24h 45m

$627
Quickest round-trip

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 5/6

6:35 am-12:20 pm

1 stop14h 45m

Seattle/Tacoma Intl

Sun 5/10

6:50 pm-5:55 pm

1 stop14h 05m

$637

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 9/3

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Thu 9/10

8:50 am-5:55 pm

2 stops24h 05m

$648

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Thu 9/24

3:05 pm-1:45 pm

1 stop31h 40m

Seattle/Tacoma Intl

Mon 9/28

2:30 pm-12:25 am

2 stops24h 55m

$732

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Thu 5/7

6:00 am-10:55 pm

2 stops25h 55m

Seattle/Tacoma Intl

Mon 5/11

3:00 pm-2:30 pm

2 stops38h 30m

$759

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Fri 6/12

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Tue 6/30

3:55 pm-8:25 pm

1 stop19h 30m

$807

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Mon 7/13

8:55 pm-1:45 pm

1 stop25h 50m

Seattle/Tacoma Intl

Tue 7/28

3:55 pm-8:25 pm

1 stop19h 30m

$926

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Thu 4/23

6:00 am-4:00 pm

3 stops19h 00m

Seattle/Tacoma Intl

Thu 5/7

7:00 pm-9:00 pm

3 stops17h 00m

$955

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 29 resultsSorted by cheapest first
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 April 9, 2026.

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, November is the cheapest month in which you can book a flight from Oslo to Seattle (average of $367). Flying from Oslo to Seattle in July is currently the most expensive (average of $531). 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?

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 April 9, 2026.
Get a feel of what it's like to fly with Scandinavian Airlines,Icelandair, andLufthansa 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
7.3
Good
1,748 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Crew

8.0

Entertainment

6.7

Overall

7.3

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
7.3
Good
1,748 reviews
Scandinavian Airlines
7.3
Good
1,748 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Crew

8.0

Entertainment

6.7

Overall

7.3

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
631 reviews
Scandinavian Airlines
7.3
Good
1,748 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Crew

8.0

Entertainment

6.7

Overall

7.3

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.
Lufthansa
6.8
Okay
7,900 reviews
Scandinavian Airlines
7.3
Good
1,748 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Crew

8.0

Entertainment

6.7

Overall

7.3

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 3 different airlines.

  • How long is the flight from Oslo to Seattle?

    Airlines like Delta, Icelandair, and United Airlines fly from Oslo to Seattle in about 13h 05m. The time it takes to get you to your destination can typically vary by up to 1h 40m. 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. Other airlines that can offer you cheap pricing are Lufthansa, from $474, and Scandinavian Airlines, from $588. Users have found that Icelandair is 26% 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 $251 on Scandinavian Airlines. 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 $367). Flying from Oslo to Seattle in July is currently the most expensive (average of $531). 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
Kent
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Renton
Puyallup
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Oslo to Seattle

Discover the top 3 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 April 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$443Average$623FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$474Average$487FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$588Average$703FlexibilityNo cancel feeOn-time77%

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