Find flights
When to book
Airlines
FAQs

Cheap flights from Seattle to Oslo from C$ 270

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Oslo are usually found in November or January, booked 43 days in advance, depart on a Monday or Wednesday and return on a Monday

Cheap flight deals from Seattle to Oslo

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Oslo (OS1). 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 30 April 2025.

Round-trip from

C$ 680

One-way from

C$ 270

Popular in

June

Cheapest in

November

Average price

C$ 807
Icelandair
  • Icelandair
  • 17/8-4/9
  • 2 total stops
  • 24h 35m total
  • Seattle to Oslo
Search Deals
Icelandair
  • Icelandair
  • 18/10
  • 1 total stop
  • 32h 35m total
  • Seattle to Oslo
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 362 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 67 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Seattle to Oslo

Cheapest flights from Seattle to Oslo
Explore the most affordable flight options available from Seattle to Oslo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Sun 17/87:00 p.m.SEA - OSL
1 stop11h 25mIcelandair
Fri 5/94:30 p.m.OSL - SEA
1 stop13h 10mIcelandair
Deal found 29/4C$ 680
Mon 11/84:25 p.m.SEA - OSL
1 stop22h 30mSWISS
Mon 25/85:40 a.m.OSL - SEA
1 stop18h 15mSWISS
Deal found 29/4C$ 702
Mon 11/810:05 p.m.SEA - OSL
2 stops25h 50mUnited Airlines
Mon 25/89:50 a.m.OSL - SEA
2 stops43h 51mUnited Airlines
Deal found 29/4C$ 759
Mon 11/89:50 a.m.SEA - OSL
2 stops18h 55mDelta
Mon 25/86:05 a.m.OSL - SEA
1 stop20h 30mDelta
Deal found 29/4C$ 786
Tue 12/810:40 a.m.SEA - OSL
2 stops20h 35mBritish Airways
Wed 20/85:05 p.m.OSL - SEA
1 stop27h 30mBritish Airways
Deal found 29/4C$ 788
Thu 4/127:42 a.m.SEA - OSL
2 stops18h 13mFinnair
Mon 15/128:50 p.m.OSL - SEA
2 stops31h 06mFinnair
Deal found 29/4C$ 799
Wed 15/104:20 p.m.SEA - OSL
1 stop12h 50mScandinavian Airlines
Mon 20/104:10 p.m.OSL - SEA
2 stops49h 13mScandinavian Airlines
Deal found 29/4C$ 801
Tue 19/87:00 a.m.SEA - OSL
2 stops22h 10mAustrian Airlines
Tue 2/92:55 p.m.OSL - SEA
2 stops38h 47mAustrian Airlines
Deal found 29/4C$ 832
Thu 21/82:20 p.m.SEA - OSL
1 stop18h 40mLufthansa
Sun 31/86:50 a.m.OSL - SEA
1 stop14h 05mLufthansa
Deal found 29/4C$ 854
Wed 7/55:13 p.m.SEA - OSL
3 stops34h 02mMultiple Airlines
Wed 21/51:55 p.m.OSL - SEA
2 stops37h 38mMultiple Airlines
Deal found 29/4C$ 855
Fri 12/91:55 p.m.SEA - OSL
1 stop14h 45mKLM
Sun 21/95:20 p.m.OSL - SEA
1 stop27h 25mKLM
Deal found 29/4C$ 879
Wed 15/1011:30 a.m.SEA - OSL
3 stops22h 45mTAP AIR PORTUGAL
Mon 20/1012:50 p.m.OSL - SEA
2 stops30h 29mTAP AIR PORTUGAL
Deal found 29/4C$ 1,965

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Oslo 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 629,999 searches. Data last updated 30 April 2025.
Use the filters below to find and compare flights from Seattle to Oslo that are best for you.

Fly from

Seattle

Fly to

Oslo

Route

Depart

Return

Price

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 17/8

7:00 p.m.-3:25 p.m.

1 stop11h 25m

Oslo Gardermoen

Thu 4/9

4:30 p.m.-8:40 p.m.

1 stop13h 10m

C$ 680

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 11/8

4:25 p.m.-11:55 p.m.

1 stop22h 30m

Oslo Gardermoen

Mon 25/8

5:40 a.m.-2:55 p.m.

1 stop18h 15m

C$ 702

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 11/8

10:05 p.m.-8:55 a.m.

2 stops25h 50m

Oslo Gardermoen

Mon 25/8

9:50 a.m.-8:41 p.m.

2 stops43h 51m

C$ 759

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 11/8

9:50 a.m.-1:45 p.m.

2 stops18h 55m

Oslo Gardermoen

Mon 25/8

6:05 a.m.-5:35 p.m.

1 stop20h 30m

C$ 786

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 12/8

10:40 a.m.-4:15 p.m.

2 stops20h 35m

Oslo Gardermoen

Wed 20/8

5:05 p.m.-11:35 a.m.

1 stop27h 30m

C$ 788

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 15/10

4:20 p.m.-2:10 p.m.

1 stop12h 50m

Oslo Gardermoen

Mon 20/10

4:10 p.m.-8:23 a.m.

2 stops49h 13m

C$ 801

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 19/8

7:00 a.m.-2:10 p.m.

2 stops22h 10m

Oslo Gardermoen

Tue 2/9

2:55 p.m.-8:42 p.m.

2 stops38h 47m

C$ 832

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Thu 21/8

2:20 p.m.-6:00 p.m.

1 stop18h 40m

Oslo Gardermoen

Sun 31/8

6:50 a.m.-11:55 a.m.

1 stop14h 05m

C$ 854

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Fri 12/9

1:55 p.m.-1:40 p.m.

1 stop14h 45m

Oslo Gardermoen

Sun 21/9

5:20 p.m.-11:45 a.m.

1 stop27h 25m

C$ 879

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sat 19/7

5:40 p.m.-8:05 p.m.

1 stop17h 25m

Oslo Gardermoen

Wed 6/8

8:35 a.m.-4:00 p.m.

1 stop16h 25m

C$ 987

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 21 results
1
2
3

Best time to book a flight from Seattle to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo from Seattle 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 Seattle to Oslo

How far ahead should I book a flight from Seattle to Oslo?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Oslo. Price data was last updated on 25 April 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Oslo, you should look to book at least 43 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Oslo?

Currently, April is the cheapest month in which you can book a flight from Seattle to Oslo (average of C$ 666). Flying from Seattle to Oslo in June is currently the most expensive (average of C$ 949). 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 SEA to OSL?

Find hourly flight availability from Seattle to Oslo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 April 2025.

It’s typically best to fly out from Seattle to Oslo in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Oslo by month

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

In terms of precipitation, rainfall in Oslo ranges from 40.0 - 90.0 mm per month. August is typically the wettest month, when rainfall can reach 90.0 mm. February is typically the driest time to visit Oslo when rainfall is around 40.0 mm.

Temperature in Oslo by month

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

If weather is an important factor for your trip to Oslo, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -3.0 C).

Reviews of airlines servicing Oslo

Get insights into the airlines that provide service to Oslo. 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 Oslo. Reviews last updated 30 April 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from Seattle to Oslo to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews
Check prices

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Oslo. 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 from for flights from Seattle to Oslo?

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Oslo. 3 airlines have flights from Seattle/Tacoma Intl to Oslo on a regular basis. Booking flights from Seattle/Tacoma Intl to Oslo should not be difficult; the airport handles an average of 0 outbound flights to Oslo per day.

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

    Cheapflights users have booked flights from Seattle to Oslo round-trip from C$ 680. Other airlines that can offer you cheap pricing are SWISS, from C$ 702, and United Airlines, from C$ 759. Icelandair is priced at 30% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Oslo one-way?

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at C$ 270. SWISS flights start at C$ 587 while deals on United Airlines start at C$ 630 one-way.

  • Can I find deals for flights from Seattle to Oslo that include hotel bookings?

    Yes. In addition to deals on Seattle to Oslo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Oslo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Oslo.

  • Can I find deals for business class flights from Seattle to Oslo?

    Yes. Cheapflights offers flight deals from Seattle to Oslo 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 Seattle to Oslo?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Oslo (average of C$ 666). Flying from Seattle to Oslo in June is currently the most expensive (average of C$ 949). 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

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.

Alternative routes for Seattle to Oslo

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Oslo Gardermoen flights

Top 3 airlines flying from Seattle to Oslo

Discover the top 3 airlines that operate flights from Seattle to Oslo. 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 629,999 searches. Data last updated 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 646AverageC$ 940FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapestC$ 838AverageC$ 888FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapestC$ 887AverageC$ 909FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Oslo?

Cheapflights helps you search for flights from Seattle to Oslo via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Oslo?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Oslo for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Oslo with no change fees?

Yes, we can. To see specific flights from Seattle to Oslo with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Oslo become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Oslo from Seattle today and book when prices fit your budget.

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.