$389 Find Cheap Flights from Spain to Seattle - Compare and Save

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Cheap Flights from Spain to Seattle

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

Recent round-trip flight deals from Spain to Seattle

Sun, Feb 7 - Sun, Feb 21
Multiple Airlines Logo
7:00 am - 1:05 pmMAD  Madrid Barajas-SEA Seattle/Tacoma Intl
15h 05m1 stop Frankfurt am Main
Multiple Airlines Logo
3:00 pm - 9:45 pmSEA  Seattle/Tacoma Intl-MAD Madrid Barajas
21h 45m1 stop Frankfurt am Main
$578Multiple Airlines
Thu, Jan 14 - Mon, Jan 18
Multiple Airlines Logo
5:05 pm - 5:00 pmBIO  Bilbao-SEA Seattle/Tacoma Intl
32h 55m2 stops London Heathrow Reykjavik Keflavik Intl
Multiple Airlines Logo
2:35 pm - 9:55 pmSEA  Seattle/Tacoma Intl-BIO Bilbao
22h 20m2 stops Reykjavik Keflavik Intl London Heathrow
$603Multiple Airlines
Thu, Jan 14 - Mon, Jan 18
Multiple Airlines Logo
5:05 pm - 5:00 pmBIO  Bilbao-SEA Seattle/Tacoma Intl
32h 55m2 stops London Heathrow Reykjavik Keflavik Intl
Multiple Airlines Logo
2:35 pm - 10:25 amSEA  Seattle/Tacoma Intl-BIO Bilbao
34h 50m3 stops Reykjavik Keflavik Intl London Heathrow Barcelona-El Prat
$657Multiple Airlines
Thu, Jan 14 - Mon, Jan 18
Delta Logo
6:50 am - 11:49 amBIO  Bilbao-SEA Seattle/Tacoma Intl
13h 59m1 stop Amsterdam Schiphol
Delta Logo
2:25 pm - 4:30 pmSEA  Seattle/Tacoma Intl-BIO Bilbao
17h 05m1 stop Amsterdam Schiphol
$854Delta
Tue, Feb 9 - Sun, Feb 21
Delta Logo
6:50 am - 11:47 amBIO  Bilbao-SEA Seattle/Tacoma Intl
13h 57m1 stop Amsterdam Schiphol
Delta Logo
3:30 pm - 5:25 pmSEA  Seattle/Tacoma Intl-BIO Bilbao
16h 55m1 stop Paris Charles de Gaulle
$856Delta
Tue, Feb 9 - Sun, Feb 21
Delta Logo
6:50 am - 11:47 amBIO  Bilbao-SEA Seattle/Tacoma Intl
13h 57m1 stop Amsterdam Schiphol
Delta Logo
7:20 am - 11:30 amSEA  Seattle/Tacoma Intl-BIO Bilbao
19h 10m2 stops Boston Logan Intl Paris Charles de Gaulle
$856Delta
Sat, Nov 21 - Wed, Dec 9
Lufthansa Logo
6:50 am - 12:00 pmBCN  Barcelona-El Prat-SEA Seattle/Tacoma Intl
14h 10m1 stop Frankfurt am Main
Lufthansa Logo
2:50 pm - 5:35 pmSEA  Seattle/Tacoma Intl-BCN Barcelona-El Prat
17h 45m1 stop Munich Franz Josef Strauss
$910Lufthansa
Sun, Nov 22 - Sat, Dec 5
Lufthansa Logo
7:30 am - 1:00 pmBCN  Barcelona-El Prat-SEA Seattle/Tacoma Intl
14h 30m1 stop Munich Franz Josef Strauss
Lufthansa Logo
1:50 pm - 7:55 pmSEA  Seattle/Tacoma Intl-BCN Barcelona-El Prat
21h 05m1 stop Frankfurt am Main
$910Lufthansa
Wed, Dec 23 - Wed, Jan 20
British Airways Logo
7:25 pm - 11:25 amBCN  Barcelona-El Prat-SEA Seattle/Tacoma Intl
25h 00m1 stop London Heathrow
British Airways Logo
6:45 pm - 6:30 pmSEA  Seattle/Tacoma Intl-BCN Barcelona-El Prat
14h 45m1 stop London Heathrow
$954British Airways
Wed, Dec 23 - Mon, Jan 18
British Airways Logo
8:45 pm - 11:25 amBCN  Barcelona-El Prat-SEA Seattle/Tacoma Intl
23h 40m1 stop London Heathrow
British Airways Logo
6:45 pm - 1:45 pmSEA  Seattle/Tacoma Intl-BCN Barcelona-El Prat
34h 00m1 stop London Heathrow
$960British Airways
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 flight to Seattle?

In the last 5 days, the cheapest flight deal to Seattle was found on the route from Barcelona, at $603 return. The most popular connection is from Madrid to Seattle and KAYAK users have found round-trip deals for as low as $678 in the last 5 days.

What is the cheapest day to fly to Seattle?

Based on KAYAK data, the cheapest day to fly to Seattle is Wednesday where round-trip tickets can be as cheap as $1,062. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $1,156 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is November, where tickets cost $829 on average for return flights. On the other hand, the most expensive months are July and June, where the average cost of tickets from Spain is $1,100 and $1,018 respectively. For one-way flights, the best month to travel is April with an average price of $621.

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

To get a below average price, you should book around 2 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low season

March

Cheapest flight

$389
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from Barcelona to Seattle

FAQs - booking Seattle flights

  • What is the cheapest flight to Seattle?

    In the last 5 days, the cheapest flight deal to Seattle was found on the route from Barcelona, at $603 return. The most popular connection is from Madrid to Seattle and KAYAK users have found round-trip deals for as low as $678 in the last 5 days.

  • 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?

    There is only 1 airport in Seattle, called Seattle/Tacoma Intl Airport (SEA). 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 $1,265. The cheapest price found on KAYAK in the last 2 weeks cost $466 and departed from Barcelona-El Prat 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 15,116 direct flights from within Spain 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 Barcelona-El Prat $597

  • 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 Spain 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 8688 reviews
7.8Entertainment
8.1Boarding
7.8Comfort
7.2Food
8.5Crew
Airline reviews

Rude staff from baggage check to gate crew. Poor instructions. Inconsistent application of baggage rules.

6.0 GoodKatharine, Oct 2026
Read more Delta reviews

Rude staff from baggage check to gate crew. Poor instructions. Inconsistent application of baggage rules.

more room in seats, larger snacks, more comms with delays

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.

Loved the towel at the end. Service was frequent and perfect.

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

Both flights were delayed over 1 hour. And I had to pay for seats, even though my reservation supposedly included free seat selection.

The United flight was excellent! The flight attendants were attentive and nice, and the food was very good! And the glasses are larger than on Lufthansa flights! I don’t want to have to ask for 15 glasses of water because their glasses are ridiculously small!

I pre-ordered my meal and did not receive it. The seats are very old, uncomfortable and dirty. The crew was excellent and made my stay on board comfortable and enjoyable.

The only thing that the airport can improve which will help Lufthansa from delay flights is to warn the passengers that are flying to the USA to be earlier to the gate due to the documents check that in our case delayed the flight

The plane was 3 hours late. What more can I say?!.. This, plus my horrendous experience of the second leg of my trip in where the plane had to be boarded (off and on) without escalators.. but not-covered outside regular steps…!! No… this is my last flight with Lufthansa!! Never again!

SEA to Munich flight was turbulent and you could hear rattling in the plane. The food was TERRIBLE, return flight was better. We will not fly Lufthansa in the future.

Flight was good, staff members were helpful and energetic, food can be more tasty.

Fast boarding, great entertainment on board, lots of updates from the capitan during the trip, no lost luggage issues

I ended up upgrading to business class. They use Seat Boost and even though I was the highest bidder at 900 Euros, they decline my offer. When I got to the Gate, I asked if I could upgrade and they said yest for 1300 Euros.

The flight was 1 hour late due to technical problems with the plane. We paid for premium economy seats, but the seats were extremely uncomfortable and just as crowded as regular economy seats with perhaps a little more legroom. I had to pay extra to select our seats in advance. Compared to other airlines with premium economy seats, Condor’s premium economy seats were poor and other airlines don’t charge to select your seats in advance. The worst though was the toilets. They ran out of toilet paper with 4 hours left in a 12 hour flight, trash was overflowing, and the toilets were smelly. I will never fly Condor again and I will advise my friends and colleagues to never fly Condor.

Terrible. I can't believe I lost my entire ticket price when I tried to cancel or change the flight the day before.

It was freezing cold, the flight delayed and then I got rebooked to a different connecting flight with a four hour waiting time even though I would have easily made my initial connection

Absolutely the worst food I ever had on any flight. Half of passengers simply didn't eat their meals, as I noticed.

The crew was friendly, but the comfort of the plane and the food definitely had room for improvement.

The seats are too close to the ones in front.

Seat was the worst I ever had in an airplane

I will definitely recommend your service. This is my first experience with Condor and so far it was great!

A flight attendant placed a meal on my tray. I was in 44E. The passenger who was in 44G had gone to the bathroom. I ate the meal. When the passenger in 44G asked where his meal was the flight attendant put the blame on me. She claimed another attendant put the meal on my tray. She then claimed when she gave me the meal she asked me if I had ordered a special meal. She did not Worst experience I have ever had with a crew member.

ok. It's a short flight and it was delayed, hence the ok rating.

Crew members were thorough in checking seatbelts and whatnot which makes me feel cared for because passenger safety is a main concern.

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

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.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

Adequate to good experience. Comfort was mediocre but everything else was good..

Boarding was poor. Why are first class passengers not boarded first?! Bus to the plane and then held on a packed bus because we were waiting for people on the bus before to finish boarding. Seat belt on the fist clas seat is very uncomfortable, cutting into your neck. Other than that crew, seating and food were all excellent. Entertainment, as usual - rubbish.

Had a very bad experience flying out of London. Our initial flight was cancelled without notice and the next flight had a layover of 8 extra hours. Me, my husband and my 8-year-old were already sick, and this further added to our problems. We paid extra for the seats: I was not even given our chosen seats which we paid for months before the trip. We were shoved into the available seats which were middle ones in the back (we had paid for front window, aisle, aisle). The seats were so uncomfortable and getting out of middle seats every so often (with a sick child) was a task. We had initially chosen British Airways because of the short layover, however, that went out of the window. Although unexpected things happen all the time and I understand customers have to adjust for the unplanned, however, how the airlines react and make the passengers comfortable during that time is the real test. We were not given any compensation for food or any arrangement to stay comfortable during that time. In fact, our paid seats were taken away as well.

Crew very helpful and friendly. Food is so so. Main meal is not always the best. Did have a choice of a snack part way which was either a cookie, corn snack, or similar. Second kind of meal was basically like a pizza pastry that really wasn’t a favorite but probably a European snack? Screens and selections of movies, tv and such were good. No WI-Fi unless you buy so no free texting or such on the long flight but I think that might be any overseas flight.

Please make sure the number of seats matches the number of overhead bins and passengers don't carry on more than one bag.

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