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. Another airline that can offer you cheap pricing is Scandinavian Airlines. 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 $347 on British Airways. Other airlines that offer cheap prices include American Airlines from $364 and Icelandair from $496 one-way.

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.

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).

What is the cheapest time of day to fly from OSL to SEA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oslo to Seattle as you normally would.

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 2 different airlines.

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.

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Find flight deals from Oslo to Seattle

Popular in	December
Cheapest in	October
Average price	$543

Highest demand for flights based on searches. 2% potential increase in price ($15 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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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.

OS1-SEA

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.

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Everything you need to know about your flight from Oslo to Seattle

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

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 83 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, October is the cheapest month in which you can book a flight from Oslo to Seattle (average of $543). Flying from Oslo to Seattle in December is currently the most expensive (average of $865). 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.

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with 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.

Scandinavian Airlines

7.4

Good

2,019 reviews

Reviews

1 / 20

6.0

Good

siavash,Oct 2026

CPH - JFK

I was seated in premium economy and I didn’t feel the crew being attentive or a warm sense of hospitality, the plane was clean. The seats were comfortable.

Scandinavian Airlines

7.4

Good

2,019 reviews

Scandinavian Airlines

7.4

Good

2,019 reviews

Reviews

1 / 20

6.0

Good

siavash,Oct 2026

CPH - JFK

I was seated in premium economy and I didn’t feel the crew being attentive or a warm sense of hospitality, the plane was clean. The seats were comfortable.

Icelandair

6.9

Okay

763 reviews

Scandinavian Airlines

7.4

Good

2,019 reviews

Reviews

1 / 20

6.0

Good

siavash,Oct 2026

CPH - JFK

I was seated in premium economy and I didn’t feel the crew being attentive or a warm sense of hospitality, the plane was clean. The seats were comfortable.

Related info for your journey

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 2 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 $443. Another airline that can offer you cheap pricing is Scandinavian Airlines. 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 $347 on British Airways. Other airlines that offer cheap prices include American Airlines from $364 and Icelandair from $496 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, October is the cheapest month in which you can book a flight from Oslo to Seattle (average of $543). Flying from Oslo to Seattle in December is currently the most expensive (average of $865). 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.

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Top 2 airlines flying from Oslo to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$443	Average$623	FlexibilityNo cancel fee	On-time76%
Scandinavian Airlines	Cheapest$588	Average$797	FlexibilityNo cancel fee	On-time77%

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Cheap flights from Oslo to Seattle (SEA)

Find cheap flights from Oslo to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Oslo to Seattle

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

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

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 83 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?

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with 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.

Related info for your journey

What airport do you fly into for flights to Seattle from Oslo?

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

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

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

How can I find direct flights from Oslo to Seattle?

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

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

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Search flights from Oslo to Seattle by cabin class

Find flights from Oslo to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Oslo and Seattle flights

Browse other Oslo and Seattle flight options. Last updated on October 20, 2026.

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Top 2 airlines flying from Oslo to Seattle

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