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$431+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 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 July 31, 2025.

Round-trip from

$516
(Delta)

One-way from

$431
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$735
From Oslo to Seattle/Tacoma Intl
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One-way flight from Oslo to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 15% potential increase in price ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Delta deal was found by Cheapflights users on 7/31. 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 8/229:20 amOSL - SEA
2 stops19h 48mDelta
Wed 10/227:50 amSEA - OSL
2 stops19h 00mDelta
Deal found 7/31$516
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:40 amOSL - SEA
1 stop18h 10mMultiple Airlines
Sat 9/207:15 amSEA - OSL
2 stops20h 00mMultiple Airlines
Deal found 7/30$552
This Gotogate deal was found by Cheapflights users on 7/31. 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.
Thu 8/212:55 pmTRF - SEA
1 stop31h 55mScandinavian Airlines
Sun 8/244:00 pmSEA - TRF
1 stop13h 20mScandinavian Airlines
Deal found 7/31$566
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 9/136:35 amOSL - SEA
2 stops23h 07mUnited Airlines
Sat 9/208:00 amSEA - OSL
3 stops48h 15mUnited Airlines
Deal found 7/30$572
This Scandinavian Airlines deal was found by Cheapflights users on 7/31. 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 9/2611:05 amOSL - SEA
1 stop11h 55mScandinavian Airlines
Mon 9/292:25 pmSEA - OSL
2 stops17h 55mScandinavian Airlines
Deal found 7/31$579
This Travelis deal was found by Cheapflights users on 7/31. 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 8/219:50 amOSL - SEA
2 stops17h 46mAir Canada
Sun 8/245:30 amSEA - OSL
2 stops25h 10mAir Canada
Deal found 7/31$596
This Priceline deal was found by Cheapflights users on 7/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/207:10 amOSL - SEA
2 stops26h 47mBritish Airways
Sat 1/36:50 pmSEA - OSL
1 stop30h 45mBritish Airways
Deal found 7/30$657
This oojo deal was found by Cheapflights users on 7/31. 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.
Sun 8/101:50 pmOSL - SEA
1 stop13h 00mIcelandair
Thu 8/1411:30 pmSEA - OSL
1 stop28h 05mIcelandair
Deal found 7/31$823
This oojo deal was found by Cheapflights users on 7/31. 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.
Thu 9/259:00 amTRF - SEA
2 stops35h 55mLufthansa
Tue 9/302:20 pmSEA - TRF
2 stops39h 45mLufthansa
Deal found 7/31$927
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/31. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/810:25 amOSL - SEA
3 stops32h 54mTAP AIR PORTUGAL
Wed 9/2411:30 amSEA - OSL
2 stops45h 20mTAP AIR PORTUGAL
Deal found 7/31$1,197
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/27:15 pmOSL - SEA
2 stops29h 03mKLM
Sat 8/169:30 amSEA - OSL
2 stops16h 35mKLM
Deal found 7/30$1,222
This Sembo deal was found by Cheapflights users on 7/30. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/212:15 pmTRF - SEA
2 stops14h 35mMultiple Airlines
Sat 8/1611:30 pmSEA - TRF
2 stops36h 40mMultiple Airlines
Deal found 7/30$1,434

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 July 31, 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

Fri 8/22

9:20 am-8:08 pm

2 stops19h 48m

Seattle/Tacoma Intl

Wed 10/22

7:50 am-11:50 am

2 stops19h 00m

$516

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 9/13

5:40 am-2:50 pm

1 stop18h 10m

Seattle/Tacoma Intl

Sat 9/20

7:15 am-12:15 pm

2 stops20h 00m

$552

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Thu 8/21

2:55 pm-1:50 pm

1 stop31h 55m

Seattle/Tacoma Intl

Sun 8/24

4:00 pm-2:20 pm

1 stop13h 20m

$566

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 9/13

6:35 am-8:42 pm

2 stops23h 07m

Seattle/Tacoma Intl

Sat 9/20

8:00 am-5:15 pm

3 stops48h 15m

$572

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 9/26

11:05 am-2:00 pm

1 stop11h 55m

Seattle/Tacoma Intl

Mon 9/29

2:25 pm-5:20 pm

2 stops17h 55m

$579

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 8/21

9:50 am-6:36 pm

2 stops17h 46m

Seattle/Tacoma Intl

Sun 8/24

5:30 am-3:40 pm

2 stops25h 10m

$596

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 9/26

6:35 am-11:55 am

1 stop14h 20m

Seattle/Tacoma Intl

Tue 9/30

2:20 pm-12:15 pm

1 stop12h 55m

$640

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 12/20

7:10 am-12:57 am

2 stops26h 47m

Seattle/Tacoma Intl

Sat 1/3

6:50 pm-10:35 am

1 stop30h 45m

$657

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 8/10

1:50 pm-5:50 pm

1 stop13h 00m

Seattle/Tacoma Intl

Thu 8/14

11:30 pm-12:35 pm

1 stop28h 05m

$823

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Thu 9/25

9:00 am-11:55 am

2 stops35h 55m

Seattle/Tacoma Intl

Tue 9/30

2:20 pm-3:05 pm

2 stops39h 45m

$927

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 July 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 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 $389). 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 July 31, 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.

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 July 31, 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. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

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

    Cheapflights users have booked flights from Oslo to Seattle round-trip from $516. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from $566, and United Airlines, from $572. Users have found that Delta is 10% 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 $483 on Icelandair. Other airlines that offer cheap prices include Lufthansa from $485 and SWISS from $519 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 June is currently the most expensive (average of $389). 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
Ocean Shores
Lakewood
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Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
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Shelton

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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
Oslo Gardermoen to Portland flights
Sandefjord to Seattle 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$399Average$499FlexibilityNo 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%

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