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$448+ Cheap flights from Oslo to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheapflights Tip: The best prices from Oslo to Seattle/Tacoma Intl are usually found in May or January, booked 61 days in advance, depart on a Saturday or Friday and return on a Tuesday

Cheap flight deals from Oslo to Seattle

Best flights from Oslo to Seattle
Discover carefully curated flight deals from Oslo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 26, 2025.

This Travelis deal was found by Cheapflights users on 12/24. 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 1/259:30 pmOSL - SEA
1 stop28h 30mIcelandair
Sat 2/72:35 pmSEA - OSL
1 stop21h 00mIcelandair
Deal found 12/24$448
This American Airlines deal was found by Cheapflights users on 12/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2111:40 amOSL - SEA
1 stop32h 55mAmerican Airlines
Mon 5/251:31 pmSEA - OSL
2 stops24h 59mAmerican Airlines
Deal found 12/23$490
This Travelis deal was found by Cheapflights users on 12/24. 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 1/259:35 amOSL - SEA
2 stops22h 08mLufthansa
Sat 2/72:00 pmSEA - OSL
1 stop14h 05mLufthansa
Deal found 12/24$493
This Travelis deal was found by Cheapflights users on 12/24. 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 1/259:35 amOSL - SEA
2 stops22h 08mMultiple Airlines
Sat 2/710:58 amSEA - OSL
2 stops26h 57mMultiple Airlines
Deal found 12/24$493
This British Airways deal was found by Cheapflights users on 12/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/257:20 amOSL - SEA
2 stops23h 47mBritish Airways
Sat 2/78:35 amSEA - OSL
2 stops29h 25mBritish Airways
Deal found 12/25$501
This Delta deal was found by Cheapflights users on 12/24. 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 2/86:30 amOSL - SEA
2 stops20h 59mDelta
Sun 2/157:25 amSEA - OSL
2 stops19h 25mDelta
Deal found 12/24$514
This United Airlines deal was found by Cheapflights users on 12/25. 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 1/256:05 amOSL - SEA
2 stops26h 10mUnited Airlines
Sat 2/72:00 pmSEA - OSL
1 stop33h 45mUnited Airlines
Deal found 12/25$575
This Scandinavian Airlines deal was found by Cheapflights users on 12/24. 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.
Fri 1/302:35 pmTRF - SEA
2 stops39h 11mScandinavian Airlines
Mon 2/27:10 amSEA - TRF
2 stops21h 55mScandinavian Airlines
Deal found 12/24$633
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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.
Sat 6/205:10 pmTRF - SEA
1 stop29h 35mScandinavian Airlines
Sun 6/283:55 pmSEA - TRF
1 stop19h 30mScandinavian Airlines
Deal found 12/26$790
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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.
Fri 6/196:00 amTRF - SEA
1 stop16h 45mScandinavian Airlines
Sun 6/283:55 pmSEA - TRF
1 stop19h 30mScandinavian Airlines
Deal found 12/26$790
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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.
Mon 6/228:55 pmTRF - SEA
1 stop25h 50mScandinavian Airlines
Sun 6/283:55 pmSEA - TRF
1 stop19h 30mScandinavian Airlines
Deal found 12/26$790
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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.
Fri 6/196:00 amTRF - SEA
1 stop16h 45mScandinavian Airlines
Tue 6/3012:00 pmSEA - TRF
2 stops23h 25mScandinavian Airlines
Deal found 12/26$810
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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 6/183:05 pmTRF - SEA
1 stop31h 40mScandinavian Airlines
Tue 6/3012:00 pmSEA - TRF
2 stops23h 25mScandinavian Airlines
Deal found 12/26$810
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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.
Mon 6/228:55 pmTRF - SEA
1 stop25h 50mScandinavian Airlines
Tue 6/3012:00 pmSEA - TRF
2 stops23h 25mScandinavian Airlines
Deal found 12/26$810
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. 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 6/183:05 pmTRF - SEA
1 stop31h 40mScandinavian Airlines
Sun 6/285:30 pmSEA - TRF
2 stops34h 50mScandinavian Airlines
Deal found 12/26$816

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 December 26, 2025.

Round-trip from

$448
(Travelis)

Popular in

March

Cheapest in

May

Average price

$753
From Oslo to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 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 December 2025
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 December 26, 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

Sun 1/25

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-8:35 pm

1 stop21h 00m

$448

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 5/21

11:40 am-11:35 am

1 stop32h 55m

Seattle/Tacoma Intl

Mon 5/25

1:31 pm-11:30 pm

2 stops24h 59m

$490

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

9:35 am-10:43 pm

2 stops22h 08m

Seattle/Tacoma Intl

Sat 2/7

2:00 pm-1:05 pm

1 stop14h 05m

$493

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

9:35 am-10:43 pm

2 stops22h 08m

Seattle/Tacoma Intl

Sat 2/7

10:58 am-10:55 pm

2 stops26h 57m

$493

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

7:20 am-10:07 pm

2 stops23h 47m

Seattle/Tacoma Intl

Sat 2/7

8:35 am-11:00 pm

2 stops29h 25m

$501

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 2/8

6:30 am-6:29 pm

2 stops20h 59m

Seattle/Tacoma Intl

Sun 2/15

7:25 am-11:50 am

2 stops19h 25m

$514

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

6:05 am-11:15 pm

2 stops26h 10m

Seattle/Tacoma Intl

Sat 2/7

2:00 pm-8:45 am

1 stop33h 45m

$575

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Fri 1/30

2:35 pm-8:46 pm

2 stops39h 11m

Seattle/Tacoma Intl

Mon 2/2

7:10 am-2:05 pm

2 stops21h 55m

$633

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Sat 6/20

5:10 pm-1:45 pm

1 stop29h 35m

Seattle/Tacoma Intl

Sun 6/28

3:55 pm-8:25 pm

1 stop19h 30m

$790

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Fri 6/19

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Sun 6/28

3:55 pm-8:25 pm

1 stop19h 30m

$790

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 26 results
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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 December 19, 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, February is the cheapest month in which you can book a flight from Oslo to Seattle (average of $359). Flying from Oslo to Seattle in July is currently the most expensive (average of $506). 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 December 26, 2025.

It’s typically best to fly out from Oslo to Seattle in the evening. Doing so could potentially save you 19% on the flight price compared to flying in the morning, which is usually more expensive.

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 December 26, 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
7.9
Good
8,017 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,017 reviews
Delta
7.9
Good
8,017 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Scandinavian Airlines
7.4
Good
1,627 reviews
Delta
7.9
Good
8,017 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.0
Good
592 reviews
Delta
7.9
Good
8,017 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,657 reviews
Delta
7.9
Good
8,017 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,618 reviews
Delta
7.9
Good
8,017 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 5 different airlines.

  • How long is the flight from Oslo to Seattle?

    Airlines like Icelandair, American Airlines, and Scandinavian Airlines fly from Oslo to Seattle in about 28h 30m. The time it takes to get you to your destination can typically vary by up to 10h 41m. 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 $395. Other airlines that can offer you cheap pricing are Lufthansa, from $436, and British Airways, from $442. Users have found that Icelandair is 33% 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 Finnair from $303 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, February is the cheapest month in which you can book a flight from Oslo to Seattle (average of $359). Flying from Oslo to Seattle in July is currently the most expensive (average of $506). 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
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
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Puyallup
Kirkland
Kent
Tukwila
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Chehalis

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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 5 airlines flying from Oslo to Seattle

Discover the top 5 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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$395Average$649FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$436Average$539FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$442Average$620FlexibilityNo cancel feeOn-time70%
DeltaCheapest$452Average$480FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$603Average$703FlexibilityNo cancel feeOn-time77%

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