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$384+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheapflights Tip: The best prices from Oslo to Seattle/Tacoma Intl are usually found in October or November, booked 74 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 April 30, 2025.

Round-trip from

$431
(Ticket)

One-way from

$384
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$494
From Oslo to Seattle/Tacoma Intl
Search Deals
One-way flight from Oslo to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 19% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 30, 2025.

This Ticket deal was found by Cheapflights users on 4/28. 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 6/58:05 pmOSL - SEA
1 stop24h 30mBritish Airways
Thu 6/191:29 pmSEA - OSL
2 stops25h 26mBritish Airways
Deal found 4/28$431
This Finnair deal was found by Cheapflights users on 4/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/51:10 pmOSL - SEA
1 stop11h 50mFinnair
Thu 6/195:40 pmSEA - OSL
1 stop13h 55mFinnair
Deal found 4/28$447
This American Airlines deal was found by Cheapflights users on 4/28. 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 6/51:10 pmOSL - SEA
1 stop11h 50mAmerican Airlines
Thu 6/195:40 pmSEA - OSL
1 stop13h 55mAmerican Airlines
Deal found 4/28$448
This AirNGo deal was found by Cheapflights users on 4/28. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/51:10 pmOSL - SEA
1 stop11h 50mMultiple Airlines
Thu 6/191:28 pmSEA - OSL
2 stops25h 27mMultiple Airlines
Deal found 4/28$453
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 5/286:50 amOSL - SEA
2 stops21h 47mUnited Airlines
Fri 1/23:10 pmSEA - OSL
1 stop23h 20mUnited Airlines
Deal found 4/27$465
This Lufthansa deal was found by Cheapflights users on 4/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/3011:35 amOSL - SEA
1 stop14h 24mLufthansa
Fri 1/23:10 pmSEA - OSL
1 stop17h 45mLufthansa
Deal found 4/29$477
This Travelis deal was found by Cheapflights users on 4/28. 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.
Tue 9/22:55 pmTRF - SEA
1 stop31h 55mScandinavian Airlines
Sun 9/74:00 pmSEA - TRF
1 stop13h 20mScandinavian Airlines
Deal found 4/28$534
This Flysmarter deal was found by Cheapflights users on 4/28. 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.
Thu 5/86:35 amOSL - SEA
2 stops24h 38mAir Canada
Thu 5/227:20 amSEA - OSL
2 stops22h 25mAir Canada
Deal found 4/28$534
This Ticket deal was found by Cheapflights users on 4/29. 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 5/54:20 pmOSL - SEA
1 stop13h 20mIcelandair
Sun 5/183:45 pmSEA - OSL
1 stop11h 50mIcelandair
Deal found 4/29$614
This Delta deal was found by Cheapflights users on 4/28. 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 7/189:20 amOSL - SEA
2 stops20h 00mDelta
Sun 8/36:00 amSEA - OSL
2 stops20h 05mDelta
Deal found 4/28$811
This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3112:15 pmTRF - SEA
2 stops17h 25mMultiple Airlines
Thu 1/12:35 pmSEA - TRF
2 stops14h 30mMultiple Airlines
Deal found 4/29$826
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/319:00 amTRF - SEA
2 stops36h 25mLufthansa
Thu 1/12:00 pmSEA - TRF
2 stops40h 05mLufthansa
Deal found 4/28$839

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 30, 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

Thu 6/5

8:05 pm-11:35 am

1 stop24h 30m

Seattle/Tacoma Intl

Thu 6/19

1:29 pm-11:55 pm

2 stops25h 26m

$431

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 6/5

1:10 pm-4:00 pm

1 stop11h 50m

Seattle/Tacoma Intl

Thu 6/19

5:40 pm-4:35 pm

1 stop13h 55m

$447

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 6/5

1:10 pm-4:00 pm

1 stop11h 50m

Seattle/Tacoma Intl

Thu 6/19

5:40 pm-4:35 pm

1 stop13h 55m

$448

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 6/5

1:10 pm-4:00 pm

1 stop11h 50m

Seattle/Tacoma Intl

Thu 6/19

1:28 pm-11:55 pm

2 stops25h 27m

$453

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 5/28

6:50 am-7:37 pm

2 stops21h 47m

Seattle/Tacoma Intl

Thu 1/1

11:05 am-11:30 pm

2 stops27h 25m

$465

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 5/30

11:35 am-4:59 pm

1 stop14h 24m

Seattle/Tacoma Intl

Fri 1/2

3:10 pm-5:55 pm

1 stop17h 45m

$477

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Tue 9/2

2:55 pm-1:50 pm

1 stop31h 55m

Seattle/Tacoma Intl

Sun 9/7

4:00 pm-2:20 pm

1 stop13h 20m

$534

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 5/29

6:35 am-12:25 pm

1 stop14h 50m

Seattle/Tacoma Intl

Wed 6/11

6:50 pm-10:10 pm

1 stop18h 20m

$597

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 7/18

9:20 am-8:20 pm

2 stops20h 00m

Seattle/Tacoma Intl

Sun 8/3

6:00 am-11:05 am

2 stops20h 05m

$811

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Sat 5/31

12:15 pm-8:40 pm

2 stops17h 25m

Seattle/Tacoma Intl

Thu 1/1

2:35 pm-2:05 pm

2 stops14h 30m

$826

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 April 25, 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 74 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 July is currently the most expensive (average of $405). 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 April 30, 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 30, 2025.
Get a feel of what it's like to fly with Delta, KLM and Finnair from Oslo to Seattle by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Scandinavian Airlines
7.3
Good
1,349 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    Cheapflights users have booked flights from Oslo to Seattle round-trip from $431. Other airlines that can offer you cheap pricing are Finnair, from $447, and American Airlines, from $448. Users have found that British Airways is 25% 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 $467 on Finnair. Other airlines that offer cheap prices include Lufthansa from $479 and Icelandair from $520 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, 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 July is currently the most expensive (average of $405). 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 Oslo?

Book flights to Oslo if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Kent
Lynnwood
Aberdeen
Shelton
Silverdale
Redmond
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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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
Stavanger to Portland flights
Sandefjord 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$395Average$526FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$416Average$585FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$419Average$671FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$423Average$559FlexibilityNo cancel feeOn-time76%
DeltaCheapest$452Average$534FlexibilityNo cancel feeOn-timeN/A

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