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

Finnair and American Airlines are the most popular carriers operating from Oslo to Seattle/Tacoma Intl

What airlines fly to Seattle?

Icelandair, Lufthansa and Scandinavian Airlines are the top three most popular airlines that fly to Seattle from Oslo according to our data. Icelandair is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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 December 2025, there are 5 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.

$385 Cheap Flights from Oslo to Seattle in 2025/26

Q: 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 $640 to $929. The lowest price recently found on this route was $423.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Oslo to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:30 pm - 5:00 pm

OSL

SEA

28h 30m1 stop

2:35 pm - 11:35 am

SEA

OSL

12h 00m1 stop

$423Icelandair

Sun, Jan 25 - Sat, Feb 7

9:30 pm - 5:00 pm

OSL

SEA

28h 30m1 stop

2:35 pm - 8:35 pm

SEA

OSL

21h 00m1 stop

$430Icelandair

Sun, Jan 25 - Sat, Feb 7

1:50 pm - 8:40 pm

OSL

SEA

15h 50m1 stop

3:40 pm - 3:25 pm

SEA

OSL

14h 45m1 stop

$431Icelandair

Tue, Apr 28 - Sat, May 9

9:30 pm - 5:00 pm

OSL

SEA

28h 30m1 stop

2:35 pm - 8:35 pm

SEA

OSL

21h 00m1 stop

$438Icelandair

Sun, Jan 25 - Sat, Feb 7

1:10 pm - 5:00 pm

OSL

SEA

12h 50m1 stop

2:35 pm - 11:35 am

SEA

OSL

12h 00m1 stop

$462Icelandair

Thu, Jan 29 - Thu, Feb 5

1:50 pm - 5:55 pm

OSL

SEA

13h 05m1 stop

7:00 pm - 3:25 pm

SEA

OSL

11h 25m1 stop

$464Icelandair

Mon, Apr 20 - Fri, Apr 24

5:00 pm - 11:50 am

OSL

SEA

27h 50m1 stop

1:40 pm - 4:20 pm

SEA

OSL

17h 40m1 stop

$478Multiple Airlines

Sun, Jan 25 - Sat, Feb 7

2:35 pm - 10:22 pm

TRF

SEA

40h 47m2 stops

11:46 am - 2:05 pm

SEA

TRF

42h 19m2 stops

$615Scandinavian Airlines

Wed, Mar 4 - Sun, Mar 8

2:35 pm - 10:22 pm

TRF

SEA

40h 47m2 stops

11:46 am - 2:05 pm

SEA

TRF

42h 19m2 stops

$643Scandinavian Airlines

Wed, Mar 4 - Sun, Mar 8

2:35 pm - 11:25 pm

TRF

SEA

41h 50m2 stops

1:30 pm - 2:05 pm

SEA

TRF

40h 35m2 stops

$645Scandinavian Airlines

Wed, Mar 4 - Sun, Mar 8

Icelandair flights from Oslo to Seattle

Our best Icelandair deals on Oslo to Seattle flight tickets

Icelandair

Jan 25

OSL9:30 pmOslo Gardermoen

28h 30m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Feb 7

SEA2:35 pmSeattle/Tacoma Intl

12h 00m

1 stop

OSL11:35 amOslo Gardermoen

$423

Find similar

Icelandair

Jan 25

OSL9:30 pmOslo Gardermoen

28h 30m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Feb 7

SEA2:35 pmSeattle/Tacoma Intl

21h 00m

1 stop

OSL8:35 pmOslo Gardermoen

$430

Find similar

Icelandair

Apr 28

OSL1:50 pmOslo Gardermoen

15h 50m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

May 9

SEA3:40 pmSeattle/Tacoma Intl

14h 45m

1 stop

OSL3:25 pmOslo Gardermoen

$431

Find similar

American Airlines flights from Oslo to Seattle

Our best American Airlines deals on Oslo to Seattle flight tickets

American Airlines

Mar 5

OSL11:45 amOslo Gardermoen

14h 10m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Mar 9

SEA1:37 pmSeattle/Tacoma Intl

25h 03m

2 stops

OSL10:40 pmOslo Gardermoen

$528

Find similar

American Airlines

Mar 5

OSL7:05 amOslo Gardermoen

25h 24m

2 stops

SEA11:29 pmSeattle/Tacoma Intl

Mar 9

SEA1:37 pmSeattle/Tacoma Intl

25h 03m

2 stops

OSL10:40 pmOslo Gardermoen

$535

Find similar

American Airlines

May 21

OSL7:45 amOslo Gardermoen

25h 25m

2 stops

SEA12:10 amSeattle/Tacoma Intl

May 25

SEA1:31 pmSeattle/Tacoma Intl

24h 59m

2 stops

OSL11:30 pmOslo Gardermoen

$617

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-11:35 am

1 stop12h 00m

$423

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-8:35 pm

1 stop21h 00m

$430

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 4/28

1:50 pm-8:40 pm

1 stop15h 50m

Seattle/Tacoma Intl

Sat 5/9

3:40 pm-3:25 pm

1 stop14h 45m

$431

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-8:35 pm

1 stop21h 00m

$438

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 1/29

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Thu 2/5

2:35 pm-11:35 am

1 stop12h 00m

$462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 4/20

1:50 pm-5:55 pm

1 stop13h 05m

Seattle/Tacoma Intl

Fri 4/24

7:00 pm-3:25 pm

1 stop11h 25m

$464

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

5:00 pm-11:50 am

1 stop27h 50m

Seattle/Tacoma Intl

Sat 2/7

1:40 pm-4:20 pm

1 stop17h 40m

$478

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Wed 3/4

2:35 pm-10:22 pm

2 stops40h 47m

Seattle/Tacoma Intl

Sun 3/8

11:46 am-2:05 pm

2 stops42h 19m

$615

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Wed 3/4

2:35 pm-10:22 pm

2 stops40h 47m

Seattle/Tacoma Intl

Sun 3/8

11:46 am-2:05 pm

2 stops42h 19m

$643

OsloSeattle

TRF - SEA

TRFSEA

Oslo Sandefjord

Wed 3/4

2:35 pm-11:25 pm

2 stops41h 50m

Seattle/Tacoma Intl

Sun 3/8

1:30 pm-2:05 pm

2 stops40h 35m

$645

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?

What is the cheapest month to fly to Seattle?

In general, May 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 $477. If you don’t want to visit Seattle in May, then you should wait until January to fly from Oslo, when ticket prices are also cheap, with an average price of $499.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Oslo is on a Saturday. momondo users have found tickets for Saturday departures for as low as $536. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Oslo because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $769.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Oslo at noon is the least expensive time of day to depart. momondo users have found prices as low as $536 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $662. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $594 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 $498 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	12h 50m
Direct flights	None

The fastest flight from Oslo to Seattle takes 12h 50m

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

Search flight deals

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 12h 50m 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 December 2025, there are 5 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 $395	Free Cancellation	Rating 7.0 591 reviews	Search Icelandair flights
Lufthansa	PriceFrom $436	Free Cancellation	Rating 6.8 7,634 reviews	Search Lufthansa flights
British Airways	PriceFrom $442	Free Cancellation	Rating 6.7 7,585 reviews	Search British Airways flights
Delta	PriceFrom $452	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $603	Free Cancellation	Rating 7.4 1,606 reviews	Search Scandinavian Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

Shoreline

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.