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SEA - BCN

C$ 431 Find Cheap Flights from Seattle to Barcelona

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 Barcelona-El Prat departing on 27/7. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to Barcelona-El Prat Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Barcelona, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Barcelona, as well as popular online travel agencies
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Cheap Flight Deals from Seattle to Barcelona (SEA-BCN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Barcelona 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.

Recent round-trip flight deals from Seattle to Barcelona-El Prat

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Barcelona-El Prat.
Discover the best prices for you by selecting your travel dates on KAYAK.
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Scandinavian Airlines Logo
4:00 p.m. - 6:10 p.m.SEA-BCN
17h 10m1 stop
Scandinavian Airlines Logo
7:00 p.m. - 1:50 p.m.BCN-SEA
27h 50m1 stop
C$ 658Scandinavian Airlines
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Sun, 24 Aug - Tue, 9 Sep
Scandinavian Airlines Logo
4:00 p.m. - 6:10 p.m.SEA-BCN
17h 10m1 stop
Scandinavian Airlines Logo
7:00 p.m. - 1:50 p.m.BCN-SEA
27h 50m1 stop
C$ 706Scandinavian Airlines
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Sun, 24 Aug - Sun, 7 Sep
United Airlines Logo
7:20 a.m. - 7:50 a.m.SEA-BCN
15h 30m1 stop
United Airlines Logo
12:15 p.m. - 3:31 p.m.BCN-SEA
36h 16m2 stops
C$ 824United Airlines
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Wed, 1 Oct - Fri, 24 Oct
United Airlines Logo
8:42 a.m. - 1:15 p.m.SEA-BCN
19h 33m2 stops
United Airlines Logo
12:15 p.m. - 3:31 p.m.BCN-SEA
36h 16m2 stops
C$ 830United Airlines
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Tue, 14 Oct - Thu, 23 Oct
Delta Logo
7:20 a.m. - 7:15 a.m.SEA-BCN
14h 55m1 stop
Delta Logo
9:00 a.m. - 8:32 p.m.BCN-SEA
20h 32m2 stops
C$ 951Delta
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Tue, 12 Aug - Fri, 26 Sep
Delta Logo
10:55 p.m. - 6:00 a.m.SEA-BCN
22h 05m1 stop
Delta Logo
6:20 a.m. - 11:45 a.m.BCN-SEA
14h 25m1 stop
C$ 960Delta
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Sun, 13 Jul - Tue, 23 Sep
British Airways Logo
3:13 p.m. - 5:15 p.m.SEA-BCN
17h 02m2 stops
British Airways Logo
7:10 p.m. - 11:10 a.m.BCN-SEA
25h 00m1 stop
C$ 971British Airways
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Sun, 14 Sep - Mon, 20 Oct
British Airways Logo
3:13 p.m. - 5:15 p.m.SEA-BCN
17h 02m2 stops
British Airways Logo
8:00 p.m. - 11:30 a.m.BCN-SEA
24h 30m1 stop
C$ 1,039British Airways
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Sun, 14 Sep - Sat, 20 Sep
Lufthansa Logo
6:50 p.m. - 5:55 p.m.SEA-BCN
14h 05m1 stop
Lufthansa Logo
7:50 a.m. - 4:59 p.m.BCN-SEA
18h 09m1 stop
C$ 1,087Lufthansa
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Wed, 13 Aug - Sun, 28 Sep
Lufthansa Logo
2:20 p.m. - 1:05 p.m.SEA-BCN
13h 45m1 stop
Lufthansa Logo
6:50 a.m. - 11:55 a.m.BCN-SEA
14h 05m1 stop
C$ 1,095Lufthansa
Find Deal
Tue, 12 Aug - Sun, 28 Sep

KAYAK's insights & trends for Seattle to Barcelona-El Prat flights

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

What is the cheapest month to fly from Seattle to Barcelona-El Prat Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Barcelona-El Prat Airport, 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 Barcelona-El Prat Airport is November, where tickets cost C$ 925 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 1,742 and C$ 1,732 respectively.

How far in advance should I book a flight from Seattle to Barcelona-El Prat Airport?

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 Barcelona-El Prat Airport, 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 Barcelona-El Prat Airport, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.
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Good to know

Low season

January

High season

September

Cheapest flight

C$ 431
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly (3% more expensive on average)
Flight from Seattle to Barcelona

When to book flights from Seattle to Barcelona-El Prat

Are your dates flexible? Find out the best times to travel from Seattle to Barcelona-El Prat 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 Seattle to Barcelona flights

  • Can I get special assistance services at SEA?

    Suppose you are disabled, sick, or have limited mobility. In that case, there are TSA Care professionals who can offer you the special assistance services you’ll require while at SEA, provided you inform them of the services you will require when booking your flight or at least 72h before your flight.

  • Does SEA have a children’s play area?

    SEA does have a children’s play area between Central Terminal and gates A. At this children’s play area, you can let your kids have fun as you wait for your flight to Barcelona.

  • Can I leave some of my luggage at BCN?

    If you want to leave some of your luggage at BCN, you’re in luck, as the airport boasts two Left Luggage Offices. One is situated on the 3rd Floor of T1, while the other is on the ground floor of Terminal 2B. At either, you can store some of your baggage for as long as you want.

  • How can I get special in-flight services when flying from SEA to BCN?

    If you require special in-flight services from SEA to BCN, you should inform the airline you intend to travel with of the services you will need when booking your flight or at least 72h before your flight.

  • What is the cheapest flight from Seattle to Barcelona-El Prat Airport?

    In the last 3 days, the lowest price for a flight from Seattle to Barcelona-El Prat Airport was C$ 311 for a one-way ticket and C$ 475 for a round-trip.

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

    Seattle airport is called Seattle/Tacoma Intl and the only airport in Barcelona is Barcelona-El Prat.

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

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

  • Which airline alliances offer flights from Seattle to Barcelona?

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

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

    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 Barcelona.

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

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

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

    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 Barcelona 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 Barcelona?

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

See more FAQs

KAYAK’s top tips for finding a cheap flight from Seattle to Barcelona-El Prat Airport

  • On the date you’re scheduled to fly from Seattle-Tacoma International Airport (SEA), you should get to the airport at least 2h ahead of your flight’s departure time. Doing so gives you adequate time to go through the airport’s checkpoints. Severally, travelers have missed their flights at this airport after failing to go through the airport’s security checkpoints in time for their flights. If you reach the airport as early as advised, you’ll be able to avoid finding yourself in a similar position.
  • To travel from downtown Seattle to SEA, you can board a bus, train, or taxi. If you want to travel as quickly as you can from where you are in downtown Seattle to the airport, you should board a taxi, while if you want to travel as cheaply as you can, you should board a bus. On the other hand, if you want to balance speed and transportation costs, it is in your best interest to travel by train.
  • While waiting for your flight to Barcelona at SEA, you should consider visiting The Terminal Gateway Spa. Situated Airside, near Gate A5 on Level 5, this spa offers a full array of spa services. At this highly-rated spa, you’ll enjoy relaxing services without incurring a massive bill, as it provides all its services at competitive rates.
  • If you need any help at Josep Tarradellas Barcelona-El Prat Airport (BCN), you should head to one of the airport’s information desks. In Terminal 1, there are five such desks on the Airside and two on the Landside. On the other hand, in Terminal 2, there are two information desks on the Landside and three on the airside. These desks usually are in service 24/7.
  • In case you want to shower before leaving BCN, you can do so in one of the airport’s Air Rooms. Located on the 1st Floor of Terminal 1, these suites feature free toiletries and clean facilities.
See more tips

Top airline flying from Seattle to Barcelona-El Prat

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Barcelona. 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 Barcelona-El Prat? 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.
6.7
LufthansaOverall score based on 7029 reviews
6.9Boarding
6.2Food
6.7Comfort
7.5Crew
6.4Entertainment
Airline reviews

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

6.0 GoodJane, Apr 2025ORD - FRA
Read more Lufthansa reviews

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

Smooth Flight, Friendly crew, food offering on board was limited.

I bought a ticket and paid for for our luggage but I had to pay for my luggage again. I’m so disappointed! We had a 30 min delay and because of that we missed our connecting flight and were told that we would be on the next flight (9am flight ) but we were landed we were booked at 12pm flight. I had a little baby w me, it was very stressful. I begged to leave at 10 am at least. I was emailed that we get a voucher but they didn’t work when we were at a breakfast store. I’ve been always happy w Lufthansa but this time was awful.

Good service … bus transfer upon arrival from plane to terminal: atrocious!!!

helpful and friendly. The Lufthanza people I dealt with before my holiday were so unhelpful by comparison.

We had a 1 1/2 hour delay before we left Denver. When we arrive to Frankfort, they didn’t announce that people with connecting flights to exit the plane first. My next flight was already boarding when we we taxiing in to the gate. I waited another 10 minutes to get off the plane. I had to run to catch my next flight. I mean run! I made it with one minute to spare, but my luggage did not. My luggage came two hours later on a different flight.

My flight was late from US to Frankfurt so I missed my connecting flight flight and I had to wait for long to catch the next flight which was very tiring. Otherwise everyone was very nice.

It would have been nice if my luggage had made it onto my connecting flight as well. Now I have to wait for my luggage to be delivered and that might take a while, which certainly put a damper on the entire experience.

Crew was not happy. Very uncomfortable seats. When person leans back in front of you the screen is too close to me. Food was awful.

They lost my luggage and despite all follow ups through emails and phone calls they don’t give me an update

Everything you need to know for your flight from Seattle to Barcelona-El Prat

Information on your arrival and departure airports

Barcelona-El Prat (BCN)
Seattle (SEA)

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