SEA - BCN

C$ 490 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 6/10. 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

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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Booking Insights
Flight Deals

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

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

Wed, 8 Oct - Fri, 31 Oct
United Airlines Logo
6:50 p.m. - 5:55 p.m.SEA-BCN
14h 05m1 stop
United Airlines Logo
3:05 p.m. - 9:53 a.m.BCN-SEA
26h 48m1 stop
C$ 626United Airlines
Find Deal
Sat, 18 Oct - Tue, 28 Oct
United Airlines Logo
5:31 p.m. - 7:50 a.m.SEA-BCN
29h 19m2 stops
United Airlines Logo
11:55 a.m. - 2:20 p.m.BCN-SEA
34h 25m1 stop
C$ 629United Airlines
Find Deal
Wed, 8 Oct - Thu, 23 Oct
United Airlines Logo
7:00 a.m. - 9:40 p.m.SEA-BCN
29h 40m2 stops
United Airlines Logo
12:10 p.m. - 9:43 a.m.BCN-SEA
30h 33m2 stops
C$ 632United Airlines
Find Deal
Sun, 12 Oct - Wed, 22 Oct
United Airlines Logo
7:15 a.m. - 7:50 a.m.SEA-BCN
15h 35m1 stop
United Airlines Logo
6:50 a.m. - 11:55 a.m.BCN-SEA
14h 05m1 stop
C$ 639United Airlines
Find Deal
Sat, 18 Oct - Tue, 28 Oct
 Logo
5:31 p.m. - 2:00 p.m.SEA-BCN
35h 29m1 stop
 Logo
5:50 a.m. - 1:10 p.m.BCN-SEA
15h 20m1 stop
C$ 641
Find Deal
Wed, 8 Oct - Thu, 23 Oct
Scandinavian Airlines Logo
9:25 p.m. - 8:50 a.m.SEA-BCN
50h 25m2 stops
Scandinavian Airlines Logo
10:30 a.m. - 2:00 p.m.BCN-SEA
36h 30m2 stops
C$ 664Scandinavian Airlines
Find Deal
Wed, 29 Oct - Mon, 10 Nov
Lufthansa Logo
4:10 p.m. - 11:05 p.m.SEA-BCN
22h 55m1 stop
Lufthansa Logo
6:30 p.m. - 12:10 p.m.BCN-SEA
26h 40m1 stop
C$ 679Lufthansa
Find Deal
Fri, 10 Oct - Thu, 23 Oct
Scandinavian Airlines Logo
2:10 p.m. - 8:50 a.m.SEA-BCN
33h 40m2 stops
Scandinavian Airlines Logo
10:30 a.m. - 2:00 p.m.BCN-SEA
36h 30m2 stops
C$ 690Scandinavian Airlines
Find Deal
Wed, 1 Oct - Wed, 22 Oct
 Logo
5:30 a.m. - 11:55 a.m.SEA-BCN
21h 25m2 stops
 Logo
7:50 a.m. - 10:31 p.m.BCN-SEA
23h 41m2 stops
C$ 691
Find Deal
Wed, 1 Oct - Tue, 21 Oct
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$ 702Lufthansa
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from C$ 626 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 19% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 22% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
C$ 626
Overall average: C$ 999
United Airlines
Wed 8/10Fri 31/10
SEA - BCN • 1 stop
Cheapest one-way flights
C$ 490
Typical prices: C$ 520-731
Lufthansa
Mon 6/10
SEA - BCN • 1 stop
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Barcelona-El Prat!
Booking Insights

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$ 924 (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$ 1,746 and C$ 1,600 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 3 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flightC$ 490
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly and prices are also 17% lower 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$ 354 for a one-way ticket and C$ 452 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?

    The Airbus A330-900neo is the aircraft model that flies most regularly on the Seattle to Barcelona flight route.

  • Which airline alliances offer flights from Seattle to Barcelona?

    Star Alliance, oneworld, and SkyTeam 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.

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.

Reviews of the 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.
6.8
LufthansaOverall score based on 7409 reviews
7.6Crew
7.0Boarding
6.4Entertainment
6.3Food
6.8Comfort
Airline reviews

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

6.0 GoodAnonymous, Sep 2025ORD - MUC
Read more Lufthansa reviews

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Stop charging for alcohol overseas flights and start taking cash again not everyone wants to pay with card if the person is bigger give him seat on the outside seats not the middle in between the people is common sense and mainly if you fly for Lufthansa provides the sam service and experience...

good entertainment package but rather small seats for business class

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Booked Economy but it translated to economy light for Lufthansa so now we are stuck paying an extra $75 per person both ways for our checked bags. If I had known that, I would have never booked these tickets because it came out to be more than other options. The booking in the kayak side clearly says Economy and has a link to the inormation for Lufthansa which states Economy included a checked bag. Super annoyed about that.

The flight from Dulles to Munich was just okay. The seats were comfortable and extra foot room was noticeable in comfort plus. Disappointed in the booking in so much I requested an aisle seat and then was assigned a middle seat. The food was inedible. Movie choices were moderate. I usually fly Delta, but this WA flight was cheaper. Next time, I'll happily pay the extra to fly Delta.

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

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