$330 Find Cheap Flights from Seattle to Oslo

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Oslo departing on 1/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Oslo

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Oslo.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Oslo.
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Everything you should know

Cheapest round-trip
$392
Overall average: $457
Icelandair
Sun 1/11Mon 1/26
SEA - OSL • 1 stop
Cheapest one-way
$370
Multiple Airlines
Wed 1/14
SEA - TRF • 3 stops
Top airlines
Icelandair
Cheapest • from $429 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Oslo (SEA-OSL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Oslo that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Oslo

Sun, Jan 11 - Mon, Jan 26
Icelandair Logo
2:35 pm - 11:35 am
SEA
-
OSL
12h 00m1 stop
Icelandair Logo
1:10 pm - 5:00 pm
OSL
-
SEA
12h 50m1 stop
$392Icelandair
Thu, Jan 22 - Sun, Feb 8
Icelandair Logo
2:35 pm - 11:35 am
SEA
-
OSL
12h 00m1 stop
Icelandair Logo
9:30 pm - 5:00 pm
OSL
-
SEA
28h 30m1 stop
$394Icelandair
Sat, Jan 10 - Sat, Jan 17
Icelandair Logo
2:35 pm - 8:35 pm
SEA
-
OSL
21h 00m1 stop
Icelandair Logo
1:10 pm - 5:00 pm
OSL
-
SEA
12h 50m1 stop
$406Icelandair
Mon, Mar 16 - Thu, Mar 26
Icelandair Logo
3:35 pm - 11:35 am
SEA
-
OSL
12h 00m1 stop
Icelandair Logo
1:10 pm - 6:00 pm
OSL
-
SEA
12h 50m1 stop
$429Icelandair
Thu, Jan 29 - Thu, Feb 5
Multiple Airlines Logo
8:10 am - 5:10 pm
SEA
-
OSL
24h 00m2 stops
Multiple Airlines Logo
6:15 am - 12:10 pm
OSL
-
SEA
14h 55m1 stop
$464Multiple Airlines
Sun, Jan 11 - Sun, Jan 18
British Airways Logo
6:50 pm - 10:55 am
SEA
-
OSL
31h 05m1 stop
British Airways Logo
7:20 am - 4:55 pm
OSL
-
SEA
18h 35m1 stop
$476British Airways
Thu, Jan 22 - Tue, Jan 27
Lufthansa Logo
7:00 am - 11:45 pm
SEA
-
OSL
31h 45m2 stops
Lufthansa Logo
6:25 pm - 1:20 pm
OSL
-
SEA
27h 55m1 stop
$478Lufthansa
Sat, Feb 21 - Mon, Mar 2
Scandinavian Airlines Logo
11:35 am - 4:35 pm
SEA
-
TRF
20h 00m2 stops
Scandinavian Airlines Logo
2:35 pm - 10:25 pm
TRF
-
SEA
40h 50m2 stops
$625Scandinavian Airlines
Sat, Apr 25 - Wed, May 20
Multiple Airlines Logo
7:00 pm - 6:00 pm
SEA
-
TRF
14h 00m2 stops
Multiple Airlines Logo
12:10 pm - 5:55 pm
TRF
-
SEA
14h 45m2 stops
$767Multiple Airlines
Sun, May 10 - Fri, May 29
Scandinavian Airlines Logo
9:50 am - 2:30 pm
SEA
-
TRF
19h 40m2 stops
Scandinavian Airlines Logo
3:05 pm - 1:45 pm
TRF
-
SEA
31h 40m1 stop
$792Scandinavian Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Oslo flights

Get data-powered insights and trends into flights from Seattle to Oslo to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Oslo?

The average price of all round-trip flights from Seattle to Oslo clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Seattle to Oslo, look for departures on Tuesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Oslo, Saturday is the cheapest day to fly and Monday is the most expensive.

What is the cheapest month to fly from Seattle to Oslo?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Oslo, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Oslo is January, where tickets cost $457 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $852 and $722 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Oslo, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Oslo, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Cheapest flight$370
Flight from Seattle to Oslo Sandefjord

When to book flights from Seattle to Oslo

Are your dates flexible? Find out the best times to travel from Seattle to Oslo based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Oslo

  • What is the cheapest flight from Seattle to Oslo?

    In the last 3 days, the lowest price for a flight from Seattle to Oslo was $370 for a one-way ticket and $392 for a round-trip.

  • Do I need a passport to fly between Seattle and Oslo?

    Yes, you’ll need a passport to travel to Oslo from Seattle.

  • Which airports will I be using when flying from Seattle to Oslo?

    On your way to Oslo, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing in one of Oslo’s 2 airports: Oslo Gardermoen or Oslo Sandefjord.

  • Which aircraft models fly most regularly from Seattle to Oslo?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Oslo?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Seattle and Oslo, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Oslo from Seattle?

    Reykjavik is the most popular layover city among KAYAK users traveling from Seattle to Oslo.

  • How does KAYAK find such low prices on flights from Seattle to Oslo?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Oslo.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Oslo?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Oslo from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Oslo?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Oslo with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Oslo?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Oslo from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Seattle to Oslo

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Oslo. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Oslo? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8008 reviews
8.1Boarding
7.9Entertainment
7.9Comfort
7.3Food
8.5Crew
Airline reviews

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

10.0 ExcellentMargaret, Dec 2025
BOS - PIT
Read more Delta reviews

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

I was surprised how good an American airline can be - I was really impressed.

Excellent service throughout. Airport process is quick and easy. Very courteous staff. Great service in the plane! Just outstanding punctuality and service overall!!

I have paid for extra legroom on my flight. My seat was broken and did not recline. The crew could not fix it and refused to provide me with another seat

Over all experience was good. However the connection time was too short at CPG. We missed our connecting flight to AMS as the passport control line was too long and by the time we got our passport control done it was too late I wish there were some SAS staff to help us out at the passport control center Though they put us in a KLM flight from CPG to AMS, That flight was also delayed by over two hours

No vegetarian option was provided for the regular meal or the pre-landing snack.

The Scandinavian flight was excellent, however the second flight was partnered with TAP Portugal which was not so good. crowded gate area with no chairs, delayed flight, bad boarding process, no entertainment system onboard, and the baggage didn’t get to the carousel until well over an hour which caused our taxi that was waiting to leave. Love SAS, hate TAP.

Great logistics and timeliness as we arrived quite early. Flight smooth and fast. Excellent entertainment. Plane itself was a bit tired and the crew mostly indifferent. Baggage took forever but that’s on CPH. Would use SAS again for sure.

Baggage was mis-handled; food and grocery items in the baggage were damaged.

It was a good flight. Everyone was professional and the flight was smooth.

Service, food was outstanding. They make every effort to make sure that your long flight is as comfortable as possible. The only reason I did not rate them excellent is the way they handled our cancelled flight. They were great about re-booking except for the hotel. A communication breakdown ensued regarding who was booking the hotel for our overnight stay: the city where the flight was cancelled or the city where we were going to lay over for the night. In the end, neither of them did, so we ended up doing it ourselves and were extremely lucky to get a room at all. Given that, I still would not hesitate to fly with them anytime.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Iceland air transfer was bad. They lost my luggage and I just received it 11/1

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

It was too cold in the plane my feet froze

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

Best smelling onboard bathrooms ever. Even after use the whole flight. Biggest overhead bins. Most legroom in economy class. Great Icelandiic music. Really nice staff. Icelandair is awesome! (Don’t fly Air Canada! During the strike they lied about no flights available (I booked this flight myself) and hid the process to get money back on their website by obscuring menu titles, then made it difficult and time consuming to fill out. I’m Canadian. Don’t trust Air Canada!

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

love the crews and my only problem was the delay at Frankfurt was very bad. I have travelled with Lufthansa for over 30 years now and this was cost me some planned business appointment

The flight delay made the connection a bit tight but that's outside the flight crew's control.

We just made it to our connecting flight. A long, long speed walk!

We didn't get the coffee with breakfast in the morning.. 30 mins lazer I asked flight attendant why don't we get coffee now at least.. after the breakfast..she said that captain announced possible turbulences fee minutes ago, which didn't ecplain why we didn't get it with the breakfast..breakfast was very poor btw..just little pastry which you can eat in 4 little bites. Turbulences fortunately didn't even happen.. but we didn't get that more than necessary coffee in the morning after the night flight with very poor sleep.. They just served breakfast 1 hour afzer we took off..at like 11 PM.. that doesn't make sense at all.. Also, flight attendants weren't very nice..they looked like they're not happy with their job.. :/

Lufthansa still has a good level of quality compared to US airlines, especially with respect to (1) food quality - actually tasty, (2) good French red wine - free, (3) good movie selection. Also my ticket price includes 1 free check-in luggage, while some other budget airlines sneak in an extra $150 for a checkin.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

Smooth trip no turbulence which is always a bonus for me lol! In cattle class so an element of being a bit squished (but not as bad as other shorter haul airlines) smaller plane than the one we flew out on and entertainment system wasn’t as modern but still definitely passed the time. Lovely crew x

I was attacked in the Miami airport and the staff did nothing. On my flight from London to Miami one of the flight attendants screamed at me and demanded I keep my seat in the upright position at all times during the fight so the man behind me was comfortable for the flight. I will never in my life use British airways again

Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N

I don't know about the others but the flight attendant that took care of us had the absolute wrong approach "how do we dare asking for water or anything else for that matter"

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Not my definition of first class. No leg room and barely any recline. The food was good. The crew was great. The comfort for the price I paid for London to Cairo was highway robbery. The Wi-Fi didn't work for me either.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

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

Information on your arrival and departure airports