What is the cheapest airline that flies from Oslo to Seattle/Tacoma Intl?

Finnair, British Airways, and Scandinavian Airlines are the most popular carriers operating from Oslo to Seattle/Tacoma Intl

When did momondo last update prices for flights from Oslo to Seattle/Tacoma Intl Airport?

Prices for flights from Oslo to Seattle/Tacoma Intl Airport are updated daily.

How many operators does momondo search for flights from Oslo to Seattle/Tacoma Intl Airport?

As of August 2026, there are 2 operators available to choose from for flights from Oslo to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from Oslo to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oslo to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$352 Cheap Flights from Oslo to Seattle in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Oslo to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:30 pm - 11:45 am-

28h 15m

7:00 pm - 3:25 pm-

11h 25m

$494Icelandair

Mon, Sep 7 - Tue, Sep 22

4:30 pm - 11:45 am-

28h 15m

7:00 pm - 3:25 pm-

11h 25m

$500Icelandair

Mon, Sep 7 - Tue, Sep 22

4:30 pm - 5:55 pm-

34h 25m

11:25 pm - 12:35 pm-

28h 10m

$500Icelandair

Thu, Sep 3 - Thu, Sep 10

4:30 pm - 11:45 am-

28h 15m

7:00 pm - 3:25 pm-

11h 25m

$501Icelandair

Mon, Sep 7 - Tue, Sep 22

8:35 am - 4:00 pm-

16h 25m

5:40 pm - 7:45 pm-

17h 05m

$507Finnair

Mon, Aug 31 - Mon, Sep 14

8:35 am - 4:00 pm-

16h 25m

1:40 pm - 7:45 pm-

21h 05m

$508Finnair

Mon, Sep 7 - Tue, Sep 22

9:00 pm - 1:45 pm-

25h 45m

3:55 pm - 12:55 pm-

12h 00m

$510Scandinavian Airlines

Fri, Sep 4 - Sat, Sep 19

8:35 am - 4:00 pm-

16h 25m

8:20 pm - 11:20 pm-

18h 00m

$554Multiple Airlines

Mon, Sep 7 - Tue, Sep 22

6:00 am - 1:45 pm-

16h 45m

3:55 pm - 2:30 pm-

13h 35m

$556Scandinavian Airlines

Sat, Sep 5 - Sat, Sep 19

6:00 am - 1:45 pm-

16h 45m

3:55 pm - 2:30 pm-

13h 35m

$563Scandinavian Airlines

Sat, Sep 5 - Sat, Sep 19

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Icelandair flights from Oslo to Seattle

Our best Icelandair deals on Oslo to Seattle flight tickets

Icelandair

Sep 7

OSL4:30 pmOslo Gardermoen

28h 15m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Sep 22

SEA7:00 pmSeattle/Tacoma Intl

11h 25m

1 stop

OSL3:25 pmOslo Gardermoen

$494

Icelandair

Sep 3

OSL4:30 pmOslo Gardermoen

34h 25m

1 stop

SEA5:55 pmSeattle/Tacoma Intl

Sep 10

SEA11:25 pmSeattle/Tacoma Intl

28h 10m

1 stop

OSL12:35 pmOslo Gardermoen

$500

Icelandair

Sep 7

OSL4:30 pmOslo Gardermoen

28h 15m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Sep 22

SEA7:00 pmSeattle/Tacoma Intl

11h 25m

1 stop

OSL3:25 pmOslo Gardermoen

$501

Scandinavian Airlines flights from Oslo to Seattle

Our best Scandinavian Airlines deals on Oslo to Seattle flight tickets

Scandinavian Airlines

Sep 4

OSL9:00 pmOslo Gardermoen

25h 45m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

Sep 19

SEA3:55 pmSeattle/Tacoma Intl

12h 00m

1 stop

OSL12:55 pmOslo Gardermoen

$510

Scandinavian Airlines

Sep 5

TRF6:00 amOslo Sandefjord

16h 45m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

Sep 19

SEA3:55 pmSeattle/Tacoma Intl

13h 35m

1 stop

TRF2:30 pmOslo Sandefjord

$556

Scandinavian Airlines

Sep 5

TRF6:00 amOslo Sandefjord

16h 45m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

Sep 19

SEA3:55 pmSeattle/Tacoma Intl

13h 35m

1 stop

TRF2:30 pmOslo Sandefjord

$563

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 9/7

4:30 pm-11:45 am

1 stop28h 15m

Seattle/Tacoma Intl

Tue 9/22

7:00 pm-3:25 pm

1 stop11h 25m

$494

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 9/7

4:30 pm-11:45 am

1 stop28h 15m

Seattle/Tacoma Intl

Tue 9/22

7:00 pm-3:25 pm

1 stop11h 25m

$500

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 9/3

4:30 pm-5:55 pm

1 stop34h 25m

Seattle/Tacoma Intl

Thu 9/10

11:25 pm-12:35 pm

1 stop28h 10m

$500

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 9/7

4:30 pm-11:45 am

1 stop28h 15m

Seattle/Tacoma Intl

Tue 9/22

7:00 pm-3:25 pm

1 stop11h 25m

$501

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 8/31

8:35 am-4:00 pm

1 stop16h 25m

Seattle/Tacoma Intl

Mon 9/14

5:40 pm-7:45 pm

1 stop17h 05m

$507

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 9/7

8:35 am-4:00 pm

1 stop16h 25m

Seattle/Tacoma Intl

Tue 9/22

1:40 pm-7:45 pm

2 stops21h 05m

$508

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 9/4

9:00 pm-1:45 pm

1 stop25h 45m

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-12:55 pm

1 stop12h 00m

$510

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 9/7

8:35 am-4:00 pm

1 stop16h 25m

Seattle/Tacoma Intl

Tue 9/22

8:20 pm-11:20 pm

1 stop18h 00m

$554

Quickest round-trip

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Sat 9/5

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-2:30 pm

1 stop13h 35m

$556

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Sat 9/5

6:00 am-1:45 pm

1 stop16h 45m

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-2:30 pm

1 stop13h 35m

$563

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Oslo to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Oslo and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $627 to $805.
The lowest price recently found on this route was $492.

What is the cheapest month to fly to Seattle?

In general, October is the cheapest month to fly from Oslo to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $537. If you don’t want to visit Seattle in October, then you should wait until September to fly from Oslo, when ticket prices are also cheap, with an average price of $548.

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

You are more likely to see cheaper flights to Seattle from Oslo when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $646 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Oslo for as low as $595 on momondo.

Cheap Oslo to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oslo to Seattle

Fastest flight time	13h 10m
Direct flights	None

The fastest flight from Oslo to Seattle takes 13h 10m

There are no direct flights from Oslo to Seattle. There are no popular flight routes from Oslo to Seattle.

Search flight deals

Frequently asked questions about flying from Oslo to Seattle

How far is Oslo to Seattle/Tacoma Intl by plane?
There are 4550.6 mi between Oslo and Seattle/Tacoma Intl. Typically, this will take 13h 10m by plane in normal conditions.
When did momondo last update prices for flights from Oslo to Seattle/Tacoma Intl Airport?
Prices for flights from Oslo to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Oslo to Seattle/Tacoma Intl Airport?
As of August 2026, there are 2 operators available to choose from for flights from Oslo to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Oslo to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oslo to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Oslo to Seattle

Compare and see reviews for airlines that fly from Oslo to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $443	Free Cancellation	Rating 6.9 720 reviews		Search Icelandair flights
Scandinavian Airlines	PriceFrom $588	Free Cancellation	Rating 7.4 1,916 reviews		Search Scandinavian Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Kent

Lynnwood

Redmond

Lakewood

Puyallup

Fife

Federal Way

Tukwila

Cle Elum

Marysville

Kirkland

Centralia

Shoreline

Lacey

Why use momondo?

Why should I use momondo to find a flight deal from Oslo to Seattle?

It is quick and easy to find Oslo to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights from Oslo to Seattle with flexible booking policies on momondo?

All flight searches from Oslo to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Oslo to Seattle?

Once all potential Oslo to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Oslo to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Oslo and alert you when they change.