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

Delta and KLM 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 September 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.

$424 Cheap Flights from Oslo to Seattle in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

4:30 pm - 5:55 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

34h 25m1 stop Reykjavik Keflavik Intl

2:35 pm - 11:35 amSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

12h 00m1 stop Reykjavik Keflavik Intl

$527Icelandair

Mon, Oct 19 - Tue, Nov 3

3:30 pm - 6:00 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

34h 30m1 stop Reykjavik Keflavik Intl

2:35 pm - 11:35 amSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

12h 00m1 stop Reykjavik Keflavik Intl

$528Icelandair

Mon, Oct 26 - Sun, Nov 8

8:50 pm - 7:57 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

32h 07m2 stops Helsinki-Vantaa Dallas/Fort Worth

1:38 pm - 8:05 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

21h 27m2 stops Los Angeles Helsinki-Vantaa

$530Finnair

Mon, Nov 9 - Tue, Nov 24

9:30 pm - 5:00 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

28h 30m1 stop Reykjavik Keflavik Intl

2:35 pm - 11:35 amSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

12h 00m1 stop Reykjavik Keflavik Intl

$532Icelandair

Sun, Nov 1 - Sat, Nov 14

4:30 pm - 5:55 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

34h 25m1 stop Reykjavik Keflavik Intl

2:35 pm - 11:35 amSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

12h 00m1 stop Reykjavik Keflavik Intl

$536Icelandair

Mon, Oct 19 - Tue, Nov 3

3:05 pm - 11:25 amOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

29h 20m1 stop London Heathrow

6:06 am - 4:00 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

24h 54m2 stops Chicago O'Hare Intl London Heathrow

$555British Airways

Wed, Jan 27 - Mon, Feb 1

8:40 am - 10:35 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

22h 55m2 stops Helsinki-Vantaa Dallas/Fort Worth

10:17 am - 4:00 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

20h 43m2 stops Chicago O'Hare Intl London Heathrow

$565British Airways

Wed, Jan 27 - Mon, Feb 1

6:00 am - 11:26 pmTRF Oslo Sandefjord-SEA Seattle/Tacoma Intl

26h 26m2 stops Kastrup Copenhagen San Francisco

7:15 am - 2:05 pmSEA Seattle/Tacoma Intl-TRF Oslo Sandefjord

21h 50m2 stops New York John F Kennedy Intl Kastrup Copenhagen

$717Scandinavian Airlines

Mon, Nov 9 - Tue, Nov 24

6:00 am - 11:00 pmTRF Oslo Sandefjord-SEA Seattle/Tacoma Intl

26h 00m2 stops Kastrup Copenhagen New York John F Kennedy Intl

6:00 am - 2:30 pmSEA Seattle/Tacoma Intl-TRF Oslo Sandefjord

23h 30m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen

$766Scandinavian Airlines

Wed, Nov 18 - Wed, Mar 31

6:00 am - 8:04 pmTRF Oslo Sandefjord-SEA Seattle/Tacoma Intl

22h 04m2 stops Kastrup Copenhagen San Francisco

10:26 am - 2:05 pmSEA Seattle/Tacoma Intl-TRF Oslo Sandefjord

18h 39m2 stops Chicago O'Hare Intl Kastrup Copenhagen

$798Scandinavian Airlines

Mon, Oct 26 - Sun, Nov 8

Cheap last minute flights

Enter your travel dates to find the best prices.

6:30 am - 5:48 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

20h 18m1 stop Paris Charles de Gaulle

1:30 pm - 11:45 amSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

13h 15m1 stop Paris Charles de Gaulle

$856Air France

Wed, Sep 23 - Tue, Oct 6

6:45 am - 8:27 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

22h 42m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

6:50 pm - 10:05 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

18h 15m1 stop Munich Franz Josef Strauss

$887Multiple Airlines

Wed, Sep 23 - Tue, Oct 6

6:45 am - 7:15 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

21h 30m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

7:00 am - 1:15 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

21h 15m2 stops Chicago O'Hare Intl Zurich

$890Multiple Airlines

Wed, Sep 23 - Tue, Oct 6

6:30 am - 11:15 amOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

13h 45m1 stop Paris Charles de Gaulle

6:40 pm - 11:20 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

19h 40m1 stop Paris Charles de Gaulle

$984Air France

Fri, Sep 25 - Sun, Oct 11

6:30 am - 11:15 amOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

13h 45m1 stop Paris Charles de Gaulle

6:00 am - 11:05 amSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

20h 05m2 stops Minneapolis St Paul Amsterdam Schiphol

$1,058Delta

Fri, Sep 25 - Sun, Oct 11

9:45 am - 4:35 pmTRF Oslo Sandefjord-SEA Seattle/Tacoma Intl

15h 50m2 stops Stavanger Sola Amsterdam Schiphol

1:30 pm - 2:30 pmSEA Seattle/Tacoma Intl-TRF Oslo Sandefjord

16h 00m2 stops Paris Charles de Gaulle Kastrup Copenhagen

$1,059Multiple Airlines

Wed, Sep 23 - Tue, Oct 6

6:30 am - 11:15 amOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

13h 45m1 stop Paris Charles de Gaulle

11:50 am - 3:55 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

19h 05m2 stops New York John F Kennedy Intl Reykjavik Keflavik Intl

$1,138Air France

Fri, Sep 25 - Sun, Oct 11

6:25 pm - 1:45 pmTRF Oslo Sandefjord-SEA Seattle/Tacoma Intl

28h 20m2 stops Bergen Flesland Kastrup Copenhagen

3:55 pm - 12:25 amSEA Seattle/Tacoma Intl-TRF Oslo Sandefjord

23h 30m1 stop Kastrup Copenhagen

$1,146Multiple Airlines

Fri, Sep 25 - Sun, Oct 11

6:25 am - 6:32 pmOSL Oslo Gardermoen-SEA Seattle/Tacoma Intl

21h 07m2 stops Frankfurt am Main Vancouver Intl

3:00 pm - 5:55 pmSEA Seattle/Tacoma Intl-OSL Oslo Gardermoen

17h 55m2 stops Vancouver Intl Munich Franz Josef Strauss

$1,201Multiple Airlines

Fri, Sep 25 - Sun, Oct 11

6:00 am - 1:45 pmTRF Oslo Sandefjord-SEA Seattle/Tacoma Intl

16h 45m1 stop Kastrup Copenhagen

3:55 pm - 12:25 amSEA Seattle/Tacoma Intl-TRF Oslo Sandefjord

23h 30m1 stop Kastrup Copenhagen

$1,227Scandinavian Airlines

Fri, Sep 25 - Sun, Oct 11

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Icelandair flights from Oslo to Seattle

Our best Icelandair deals on Oslo to Seattle flight tickets

Icelandair

Oct 19

OSL4:30 pmOslo Gardermoen

34h 25m

1 stop

SEA5:55 pmSeattle/Tacoma Intl

Nov 3

SEA2:35 pmSeattle/Tacoma Intl

12h 00m

1 stop

OSL11:35 amOslo Gardermoen

$527

Icelandair

Oct 26

OSL3:30 pmOslo Gardermoen

34h 30m

1 stop

SEA6:00 pmSeattle/Tacoma Intl

Nov 8

SEA2:35 pmSeattle/Tacoma Intl

12h 00m

1 stop

OSL11:35 amOslo Gardermoen

$528

Icelandair

Nov 1

OSL9:30 pmOslo Gardermoen

28h 30m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Nov 14

SEA2:35 pmSeattle/Tacoma Intl

12h 00m

1 stop

OSL11:35 amOslo Gardermoen

$532

Finnair flights from Oslo to Seattle

Our best Finnair deals on Oslo to Seattle flight tickets

Finnair

Nov 9

OSL8:50 pmOslo Gardermoen

32h 07m

2 stops

SEA7:57 pmSeattle/Tacoma Intl

Nov 24

SEA1:38 pmSeattle/Tacoma Intl

21h 27m

2 stops

OSL8:05 pmOslo Gardermoen

$530

Finnair

Oct 19

OSL12:50 pmOslo Gardermoen

20h 46m

2 stops

SEA12:36 amSeattle/Tacoma Intl

Nov 3

SEA1:35 pmSeattle/Tacoma Intl

21h 30m

2 stops

OSL8:05 pmOslo Gardermoen

$599

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 10/19

4:30 pm-5:55 pm

1 stop34h 25m

Seattle/Tacoma Intl

Tue 11/3

2:35 pm-11:35 am

1 stop12h 00m

$527

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 10/26

3:30 pm-6:00 pm

1 stop34h 30m

Seattle/Tacoma Intl

Sun 11/8

2:35 pm-11:35 am

1 stop12h 00m

$528

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 11/9

8:50 pm-7:57 pm

2 stops32h 07m

Seattle/Tacoma Intl

Tue 11/24

1:38 pm-8:05 pm

2 stops21h 27m

$530

Quickest round-trip

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Sun 11/1

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 11/14

2:35 pm-11:35 am

1 stop12h 00m

$532

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 10/19

4:30 pm-5:55 pm

1 stop34h 25m

Seattle/Tacoma Intl

Tue 11/3

2:35 pm-11:35 am

1 stop12h 00m

$536

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Wed 1/27

3:05 pm-11:25 am

1 stop29h 20m

Seattle/Tacoma Intl

Mon 2/1

6:06 am-4:00 pm

2 stops24h 54m

$555

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Wed 1/27

8:40 am-10:35 pm

2 stops22h 55m

Seattle/Tacoma Intl

Mon 2/1

10:17 am-4:00 pm

2 stops20h 43m

$565

OsloSeattle

TRF Oslo Sandefjord - SEA Seattle/Tacoma Intl

TRFSEA

Oslo Sandefjord

Mon 11/9

6:00 am-11:26 pm

2 stops26h 26m

Seattle/Tacoma Intl

Tue 11/24

7:15 am-2:05 pm

2 stops21h 50m

$717

OsloSeattle

TRF Oslo Sandefjord - SEA Seattle/Tacoma Intl

TRFSEA

Oslo Sandefjord

Wed 11/18

6:00 am-11:00 pm

2 stops26h 00m

Seattle/Tacoma Intl

Wed 3/31

6:00 am-2:30 pm

2 stops23h 30m

$766

OsloSeattle

TRF Oslo Sandefjord - SEA Seattle/Tacoma Intl

TRFSEA

Oslo Sandefjord

Mon 10/26

6:00 am-8:04 pm

2 stops22h 04m

Seattle/Tacoma Intl

Sun 11/8

10:26 am-2:05 pm

2 stops18h 39m

$798

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 typical for flights on this route.

Typical prices usually range from $518 to $674.
The lowest price recently found on this route was $527.

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 $552. If you don’t want to visit Seattle in October, then you should wait until April to fly from Oslo, when ticket prices are also cheap, with an average price of $552.

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 $662 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

Best Price Found	$424
Fastest flight time	12h 50m
Direct flights	None

The best one-way flight to Seattle from Oslo in the past 72 hours is $424. The best round-trip flight deal from Oslo to Seattle found on momondo in the last 72 hours is $527.

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

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 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 September 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 6.9 747 reviews		Search Icelandair flights
Scandinavian Airlines	PriceFrom $588	Free Cancellation	Rating 7.4 1,985 reviews		Search Scandinavian Airlines flights

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Kent

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Fife

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Puyallup

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Cle Elum

Marysville

Lacey

Centralia

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.