$398 Find Cheap Flights from Denmark to Seattle - Compare and Save

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Cheap Flights from Denmark to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denmark to Seattle

Wed, Oct 21 - Sun, Oct 25
Icelandair Logo
2:00 pm - 5:55 pmCPH  Kastrup Copenhagen-SEA Seattle/Tacoma Intl
12h 55m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:10 pm - 2:55 pmSEA  Seattle/Tacoma Intl-CPH Kastrup Copenhagen
11h 45m1 stop Reykjavik Keflavik Intl
$586Icelandair
Thu, Sep 24 - Mon, Sep 28
Multiple Airlines Logo
11:45 am - 4:35 pmBLL  Billund-SEA Seattle/Tacoma Intl
13h 50m1 stop Amsterdam Schiphol
Multiple Airlines Logo
6:45 pm - 10:25 pmSEA  Seattle/Tacoma Intl-BLL Billund
18h 40m1 stop Paris Charles de Gaulle
$587Multiple Airlines
Thu, Sep 24 - Mon, Sep 28
Multiple Airlines Logo
11:45 am - 4:35 pmBLL  Billund-SEA Seattle/Tacoma Intl
13h 50m1 stop Amsterdam Schiphol
Multiple Airlines Logo
6:45 pm - 10:25 pmSEA  Seattle/Tacoma Intl-BLL Billund
18h 40m1 stop Paris Charles de Gaulle
$600Multiple Airlines
Tue, Oct 6 - Fri, Oct 9
Icelandair Logo
2:00 pm - 5:55 pmCPH  Kastrup Copenhagen-SEA Seattle/Tacoma Intl
12h 55m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:00 pm - 9:45 pmSEA  Seattle/Tacoma Intl-CPH Kastrup Copenhagen
17h 45m1 stop Reykjavik Keflavik Intl
$602Icelandair
Thu, Sep 24 - Mon, Sep 28
Delta Logo
6:00 am - 11:47 amBLL  Billund-SEA Seattle/Tacoma Intl
14h 47m1 stop Amsterdam Schiphol
Delta Logo
7:15 am - 11:00 amSEA  Seattle/Tacoma Intl-BLL Billund
18h 45m2 stops Chicago O'Hare Intl Amsterdam Schiphol
$632Delta
Thu, Sep 24 - Mon, Sep 28
Delta Logo
11:45 am - 4:35 pmBLL  Billund-SEA Seattle/Tacoma Intl
13h 50m1 stop Amsterdam Schiphol
Delta Logo
10:35 am - 1:30 pmSEA  Seattle/Tacoma Intl-BLL Billund
17h 55m2 stops Portland Amsterdam Schiphol
$632Delta
Tue, Oct 6 - Fri, Oct 9
Scandinavian Airlines Logo
1:05 pm - 1:45 pmCPH  Kastrup Copenhagen-SEA Seattle/Tacoma Intl
9h 40mnonstop
Scandinavian Airlines Logo
3:55 pm - 10:10 amSEA  Seattle/Tacoma Intl-CPH Kastrup Copenhagen
9h 15mnonstop
$656Scandinavian Airlines
Fri, Oct 2 - Fri, Oct 9
Scandinavian Airlines Logo
1:05 pm - 1:45 pmCPH  Kastrup Copenhagen-SEA Seattle/Tacoma Intl
9h 40mnonstop
Scandinavian Airlines Logo
3:55 pm - 10:10 amSEA  Seattle/Tacoma Intl-CPH Kastrup Copenhagen
9h 15mnonstop
$671Scandinavian Airlines
Tue, Sep 29 - Tue, Oct 13
United Airlines Logo
6:20 am - 6:32 pmCPH  Kastrup Copenhagen-SEA Seattle/Tacoma Intl
21h 12m2 stops Frankfurt am Main Vancouver Intl
United Airlines Logo
7:00 am - 2:10 pmSEA  Seattle/Tacoma Intl-CPH Kastrup Copenhagen
22h 10m2 stops Chicago O'Hare Intl Zurich
$740United Airlines
Fri, Sep 25 - Fri, Oct 9
United Airlines Logo
6:30 am - 11:55 amCPH  Kastrup Copenhagen-SEA Seattle/Tacoma Intl
14h 25m1 stop Frankfurt am Main
United Airlines Logo
6:50 pm - 11:30 pmSEA  Seattle/Tacoma Intl-CPH Kastrup Copenhagen
19h 40m1 stop Munich Franz Josef Strauss
$742United Airlines
Booking Insights

KAYAK's insights & trends for flights to Seattle

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

What is the cheapest day to fly to Seattle?

Based on KAYAK data, the cheapest day to fly to Seattle is Friday where round-trip tickets can be as cheap as $1,021. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $1,408 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is November, where tickets cost $579 on average for return flights. On the other hand, the most expensive months are July and June, where the average cost of tickets from Denmark is $1,006 and $916 respectively. For one-way flights, the best month to travel is April with an average price of $509.

What is the cheapest time of day to fly to Seattle?

The cheapest time of day to fly to Seattle is generally in the afternoon, when round-trip flights cost $1,141 on average. The most expensive time of day to fly to Seattle is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,141.

What is a good deal for flights to Seattle?

If you’re looking for cheap airfare to Seattle, 25% of our users found tickets to Seattle for the following prices or less: From Copenhagen $1,021 round-trip.

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

To get a below average price, you should book around 3 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low season

November

Cheapest flight

$398
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 28% increase in price.
Flight from Copenhagen to Seattle

FAQs - booking Seattle flights

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    You’ll need to travel 11 miles to reach the Seattle city center from Seattle/Tacoma Intl Airport.

  • What is the name of Seattle’s airport?

    All flights to Seattle land at Seattle/Tacoma Intl Airport. The airport code is SEA,and it can also be referred to as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How much is a flight to Seattle?

    On average, a flight to Seattle costs $960. The cheapest price found on KAYAK in the last 2 weeks cost $788 and departed from Kastrup Copenhagen Airport.

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

    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 to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 to Seattle?

    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 Seattle with an airline and back with another airline.

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

    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 Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to Seattle are there each week?

    Each week there are around 16,807 direct flights from within Denmark to Seattle. The most common day for departures is Sunday, with 18% of flights taking off on this day.

Top tips for finding cheap flights to Seattle

  • Looking for cheap airfare to Seattle? 25% of our users found round-trip tickets to Seattle for the following prices or less: From Copenhagen $932
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Reviews of the top 4 airlines serving from Denmark to Seattle

 
Need help choosing which airline to fly with to Seattle? 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.
7.8
DeltaOverall score based on 8553 reviews
8.1Boarding
7.8Entertainment
7.2Food
7.8Comfort
8.5Crew
Airline reviews

The plane was a rather tired 737-800, with old style small luggage bins. Poor air flow. USB charger in the infotainment system was not functioning. The flight was 2 hours late due to crew rest requirements (not their fault). On arrival in Seattle, waited on the tarmac for 30 minutes with very few updates from the crew.

4.0 OkayJeff, Aug 2026
Read more Delta reviews

The plane was a rather tired 737-800, with old style small luggage bins. Poor air flow. USB charger in the infotainment system was not functioning. The flight was 2 hours late due to crew rest requirements (not their fault). On arrival in Seattle, waited on the tarmac for 30 minutes with very few updates from the crew.

One of the restrooms didn’t work. The ones that did never got replenished. Flight attendant just sitting there on their phone. No notification that the bathroom was broken so long lines. Apathetic crew.

I am in a wheelchair The gate agent knew exactly how to boarding A wheelchair first also the flight attendant knew exactly what she was doing

They did everything right and everything happened right on time.

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Our vacation started with horribly, 48hr prior to departure SAS airline cancelled our return flight giving us little to no alternative options.

Payed $140 xtra for seat arrangement Did not get the preselected seats neiter outbound nor inbound. Absolutely not worth the xtra money

Gate agent in Atlanta refused to let me take my carry-on on the plane even though I met weight and size requirements and the plane was half empty. My ticket clearly stated that I was entitled to one carry-on and one personal item. Will not fly this airline again.

not good missed my connection SAS did not leave me anywhere near enough time to make my connection. Ended up adding about 10 hours to my travel day

I travelled business class with my spouse from ATL to Helsinki and back from Riga to ATL. The seating was not very comfortable. Bread crumbs and left over disposable items from previous passengers were not picked up. The cabin was extremely noisy as the crew keep talking and laughing all night long making it difficult to relax or let alone sleep. Crew must make sure to keep the cabin as quiet as possible. The seating should add a privacy features such as curtain or something. Food choices are limited and average at best. I travel very frequently but this was my first time with SAS. I would try to avoid travelling with SAS in future and would not recommend it to my friends or family. My return flight Aug. 9th was cancelled for no specific given reason or explanation. The new flight on Aug 10th was delayed by 45 mins even though it took off on time. Sorry, if you are disappointed to read my survey but I have to speak the truth. Nayyer Islam, MD

Bid process for upgrade is very frustrating. I was notified that I had won the bidding, then was told there was no seat available.

Really like this airline. Best food for airlines and comfortable seats and attentive staff. Delay was due to air traffic.

great crew, professional, funny, and great service. good condition plane too! great experience

Very difficult to clearly hear the dialogue on videos due to airplane engine sound. Flying to Copenhagen audio was very clear. Food was excellent. Returning flight--Lunch and breakfast food was the worst I've experienced. Audio was terrible. Why the difference?

Travelling coach, comfort is all in one's perspective. Movie choices were great. Food was OK. Flight crew were pleasant. Tip: If they come through asking if you want tea or coffee, do not ask for water. They get miffed. So use the call button after they pass through.

This was an auto-rebook due to being delayed from an earlier UA connecting flight. The boarding was fine, but they sat me in a middle seat when my original booking was a window seat. Overall, the flight was fine as it still got me to my final destination.

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

leg space better than expected. two washrooms for one plane isn't enough.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

Everything was fantastic. Modern plane. All the amenities! Although the paid snacks and meals are pure robbery. Like i understand airlines need to make money, but 11$ USD for an overnight oats with some nuts in it and barely any pieces of apple.... Highway robbery

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

Our flight was delayed many times throughout the day. The final delay was about 8 hours. I spent time in line to speak to someone at their understaffed desk, and also spent time waiting online and then chatting with a service rep. None of the United employees were any help at all. I desperately wanted to go get rest and possibly re-book my trip but I was denied any compensation or voucher for a hotel. I was repeatedly told it was not United's fault and therefore they had no compensation to offer. Overall, a cold and callous experience.

Flight crew and pilots did great. Flight way delayed due to a part needing replacement. Based on what the pilot indicated- the maintenance crew could’ve resolved this more efficiently than replacing whole part- and taken less time

It was amazing. I sat in First Class as a Saga Premium member, and my service was top notch. It was wonderful. I only recently joined Saga Club since I do travel to Scandinavia often and enjoy flying through Reykjavik on Iceland Air versus other ways of travelling to Europe. This was my first trip sitting in first class, which I honestly wasn’t expecting!

There were no places to sit at the gate. Most people had to sit on the floor or stand waiting for the gate to open and board. We were told we needed passport and the person hardly looked at them. Maybe for 2 seconds. No announcement made asking to board by row or group. On a 5.5 hour flight the crew only came through the cabin 2 times offering water and buy everything else. For the price of the ticket at least offer free soda! The airliner was very comfortable

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

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

One of the worst airlines I ever flew. Boarding is a disaster, they are always late, the planes are overly crowded. Everyone on my flight lost their connection because they were 2h late. Reykjavik is also not the best airport out there.

Flight was delayed. They did a terrible job rebooking me. Agent on the ground was useless. The partner airline who ran the plane was able to help me but Iceland air was useless

Flight delayed Delay to the gate upon arrival Baggage took more than an hour so we missed our connecting!!! Terrible experience!

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