SEA - BCN

C$ 536 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 28/2. 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 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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
C$ 564
Overall average: C$ 784
Icelandair
Sun 22/2Tue 10/3
SEA - BCN • 1 stop
Cheapest direct flights
C$ 985
KLM
Sat 9/5Sun 17/5
SEA - BCN • Direct
Top airlines
Icelandair
Cheapest • from C$ 564 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 21% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 33% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Barcelona-El Prat!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Barcelona-El Prat (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-El Prat 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

Sun, 22 Feb - Tue, 10 Mar
Icelandair Logo
2:35 p.m. - 1:15 p.m.
SEA
-
BCN
13h 40m
1 stop
Icelandair Logo
11:50 a.m. - 6:00 p.m.
BCN
-
SEA
14h 10m
1 stop
C$ 564Icelandair
Wed, 4 Mar - Sun, 8 Mar
Icelandair Logo
2:35 p.m. - 1:35 p.m.
SEA
-
BCN
14h 00m
1 stop
Icelandair Logo
11:50 a.m. - 6:00 p.m.
BCN
-
SEA
14h 10m
1 stop
C$ 615Icelandair
Wed, 15 Apr - Thu, 23 Apr
United Airlines Logo
2:24 p.m. - 1:15 p.m.
SEA
-
BCN
13h 51m
1 stop
United Airlines Logo
12:15 p.m. - 11:48 a.m.
BCN
-
SEA
32h 33m
2 stops
C$ 633United Airlines
Wed, 8 Apr - Tue, 14 Apr
United Airlines Logo
5:00 a.m. - 8:00 a.m.
SEA
-
BCN
18h 00m
2 stops
United Airlines Logo
12:15 p.m. - 4:41 p.m.
BCN
-
SEA
37h 26m
2 stops
C$ 637United Airlines
Wed, 8 Apr - Tue, 14 Apr
United Airlines Logo
6:50 p.m. - 10:25 p.m.
SEA
-
BCN
18h 35m
1 stop
United Airlines Logo
12:15 p.m. - 4:41 p.m.
BCN
-
SEA
37h 26m
2 stops
C$ 638United Airlines
Sat, 7 Mar - Tue, 17 Mar
United Airlines Logo
11:47 p.m. - 8:20 a.m.
SEA
-
BCN
23h 33m
2 stops
United Airlines Logo
12:35 p.m. - 7:03 p.m.
BCN
-
SEA
38h 28m
2 stops
C$ 639United Airlines
Wed, 15 Apr - Thu, 23 Apr
United Airlines Logo
7:00 a.m. - 9:20 a.m.
SEA
-
BCN
17h 20m
2 stops
United Airlines Logo
12:15 p.m. - 11:48 a.m.
BCN
-
SEA
32h 33m
2 stops
C$ 643United Airlines
Wed, 22 Apr - Tue, 28 Apr
United Airlines Logo
6:50 p.m. - 10:25 p.m.
SEA
-
BCN
18h 35m
1 stop
United Airlines Logo
1:15 p.m. - 4:41 p.m.
BCN
-
SEA
36h 26m
2 stops
C$ 645United Airlines
Tue, 3 Mar - Thu, 12 Mar
United Airlines Logo
8:17 a.m. - 8:20 a.m.
SEA
-
BCN
15h 03m
1 stop
United Airlines Logo
6:50 a.m. - 1:10 p.m.
BCN
-
SEA
14h 20m
1 stop
C$ 652United Airlines
Tue, 3 Mar - Tue, 10 Mar
United Airlines Logo
12:43 p.m. - 8:20 a.m.
SEA
-
BCN
34h 37m
2 stops
United Airlines Logo
12:35 p.m. - 11:49 a.m.
BCN
-
SEA
55h 14m
2 stops
C$ 654United Airlines
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 January, where tickets cost C$ 725 (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$ 1,684 and C$ 1,403 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 2 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Find deals

Good to know

Low seasonNovember
Cheapest flightC$ 536
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly and prices are also 11% 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$ 536 for a one-way ticket and C$ 564 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 airlines offer Wi-Fi service onboard planes from Seattle to Barcelona?

    Only Air France offers inflight Wi-Fi service on the Seattle to Barcelona flight route.

  • 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 is the only airline alliance operating flights between Seattle and Barcelona.

  • 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 7758 reviews
6.8Comfort
6.3Food
7.6Crew
6.5Entertainment
7.0Boarding
Airline reviews

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

10.0 ExcellentGretchen, Jan 2026
SFO - FRA
Read more Lufthansa reviews

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

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.

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

Information on your arrival and departure airports

Seattle (SEA)
Barcelona-El Prat (BCN)