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

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

What airlines fly to Seattle?

Lufthansa, British Airways and Icelandair are the top three most popular airlines that fly to Seattle from Oslo according to our data. Lufthansa is the first choice among our users, with 31% 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 September 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.

$370 Cheap Flights from Oslo to Seattle in 2025

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 $487 to $634. The lowest price recently found on this route was $398.

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Find the cheapest flights from Oslo to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

4:45 pm - 5:50 pmOSL-SEA

34h 05m1 stop

3:45 pm - 12:35 pmSEA-OSL

11h 50m1 stop

$398Icelandair

Find Deal

lun., oct. 6 - dom., oct. 19

5:00 pm - 12:45 pmOSL-SEA

27h 45m1 stop

3:00 pm - 6:15 pmSEA-OSL

18h 15m1 stop

$438KLM

Find Deal

jue., oct. 30 - mié., nov. 12

8:45 am - 9:46 pmOSL-SEA

21h 01m2 stops

6:50 pm - 10:40 pmSEA-OSL

18h 50m1 stop

$443

Find Deal

jue., oct. 30 - mié., nov. 12

5:05 pm - 11:10 amOSL-SEA

27h 05m1 stop

10:39 am - 11:40 pmSEA-OSL

28h 01m2 stops

$446British Airways

Find Deal

lun., oct. 6 - dom., oct. 19

7:20 am - 10:18 pmOSL-SEA

22h 58m2 stops

11:42 am - 10:40 pmSEA-OSL

25h 58m2 stops

$448British Airways

Find Deal

dom., nov. 2 - lun., nov. 17

7:15 pm - 11:50 amOSL-SEA

25h 35m1 stop

6:35 pm - 11:20 pmSEA-OSL

19h 45m1 stop

$450

Find Deal

mié., oct. 1 - lun., oct. 6

6:15 am - 12:10 pmOSL-SEA

14h 55m1 stop

2:00 pm - 1:05 pmSEA-OSL

14h 05m1 stop

$453Lufthansa

Find Deal

jue., nov. 6 - sáb., nov. 15

6:15 am - 12:10 pmOSL-SEA

14h 55m1 stop

7:00 am - 3:20 pmSEA-OSL

23h 20m2 stops

$455Lufthansa

Find Deal

jue., nov. 6 - sáb., nov. 15

11:50 am - 4:05 pmOSL-SEA

13h 15m1 stop

1:30 pm - 4:40 pmSEA-OSL

18h 10m1 stop

$470Delta

Find Deal

jue., oct. 2 - mar., oct. 7

2:15 pm - 4:05 pmOSL-SEA

34h 50m1 stop

7:19 am - 4:40 pmSEA-OSL

24h 21m2 stops

$473Delta

Find Deal

mié., oct. 1 - mar., oct. 7

Icelandair flights from Oslo to Seattle

Our best Icelandair deals on Oslo to Seattle flight tickets

Icelandair

Oct 6

OSL4:45 pmOslo Gardermoen

34h 05m

1 stop

SEA5:50 pmSeattle/Tacoma Intl

Oct 19

SEA3:45 pmSeattle/Tacoma Intl

11h 50m

1 stop

OSL12:35 pmOslo Gardermoen

$398

Find similar

Icelandair

Nov 3

OSL1:10 pmOslo Gardermoen

12h 50m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Nov 12

SEA2:35 pmSeattle/Tacoma Intl

12h 00m

1 stop

OSL11:35 amOslo Gardermoen

$460

Find similar

Icelandair

Sep 17

OSL4:30 pmOslo Gardermoen

13h 10m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

Sep 28

SEA7:00 pmSeattle/Tacoma Intl

11h 25m

1 stop

OSL3:25 pmOslo Gardermoen

$2,106

Find similar

KLM flights from Oslo to Seattle

Our best KLM deals on Oslo to Seattle flight tickets

KLM

Oct 30

OSL5:00 pmOslo Gardermoen

27h 45m

1 stop

SEA12:45 pmSeattle/Tacoma Intl

Nov 12

SEA3:00 pmSeattle/Tacoma Intl

18h 15m

1 stop

OSL6:15 pmOslo Gardermoen

$438

Find similar

KLM

Nov 2

OSL5:00 pmOslo Gardermoen

27h 45m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Nov 17

SEA3:00 pmSeattle/Tacoma Intl

22h 30m

1 stop

OSL10:30 pmOslo Gardermoen

$444

Find similar

KLM

Oct 2

OSL11:50 amOslo Gardermoen

13h 15m

1 stop

SEA4:05 pmSeattle/Tacoma Intl

Oct 5

SEA2:00 pmSeattle/Tacoma Intl

14h 40m

1 stop

OSL1:40 pmOslo Gardermoen

$478

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

lun. 10/6

4:45 pm-5:50 pm

1 stop34h 05m

Seattle/Tacoma Intl

dom. 10/19

3:45 pm-12:35 pm

1 stop11h 50m

$398

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 10/30

5:00 pm-12:45 pm

1 stop27h 45m

Seattle/Tacoma Intl

mié. 11/12

3:00 pm-6:15 pm

1 stop18h 15m

$438

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 10/30

8:45 am-9:46 pm

2 stops21h 01m

Seattle/Tacoma Intl

mié. 11/12

6:50 pm-10:40 pm

1 stop18h 50m

$443

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

lun. 10/6

5:05 pm-11:10 am

1 stop27h 05m

Seattle/Tacoma Intl

dom. 10/19

10:39 am-11:40 pm

2 stops28h 01m

$446

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

dom. 11/2

7:20 am-10:18 pm

2 stops22h 58m

Seattle/Tacoma Intl

lun. 11/17

11:42 am-10:40 pm

2 stops25h 58m

$448

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

mié. 10/1

7:15 pm-11:50 am

1 stop25h 35m

Seattle/Tacoma Intl

lun. 10/6

6:35 pm-11:20 pm

1 stop19h 45m

$450

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 11/6

6:15 am-12:10 pm

1 stop14h 55m

Seattle/Tacoma Intl

sáb. 11/15

2:00 pm-1:05 pm

1 stop14h 05m

$453

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 11/6

6:15 am-12:10 pm

1 stop14h 55m

Seattle/Tacoma Intl

sáb. 11/15

7:00 am-3:20 pm

2 stops23h 20m

$455

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 10/2

11:50 am-4:05 pm

1 stop13h 15m

Seattle/Tacoma Intl

mar. 10/7

1:30 pm-4:40 pm

1 stop18h 10m

$470

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

mié. 10/1

2:15 pm-4:05 pm

1 stop34h 50m

Seattle/Tacoma Intl

mar. 10/7

7:19 am-4:40 pm

2 stops24h 21m

$473

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, 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 $458. If you don’t want to visit Seattle in October, then you should wait until November to fly from Oslo, when ticket prices are also cheap, with an average price of $465.

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 $578 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 $480 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

Direct flights	None

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 September 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 $399	Free Cancellation	Rating 7.0 546 reviews	Search Icelandair flights
British Airways	PriceFrom $419	Free Cancellation	Rating 6.6 7,361 reviews	Search British Airways flights
Lufthansa	PriceFrom $423	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights
Delta	PriceFrom $452	Free Cancellation	Rating 7.9 7,960 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $603	Free Cancellation	Rating 7.4 1,484 reviews	Search Scandinavian Airlines flights

Leavenworth

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SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Federal Way

Kirkland

Lakewood

Tukwila

Centralia

Shoreline

Fife

Cle Elum

Redmond

Westport

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.