SEA - BCN

C$ 484 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 12/9. 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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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, 1 Oct - Thu, 16 Oct
Scandinavian Airlines Logo
4:20 p.m. - 6:10 p.m.SEA-BCN
16h 50m1 stop
Scandinavian Airlines Logo
7:00 p.m. - 2:00 p.m.BCN-SEA
28h 00m1 stop
C$ 703Scandinavian Airlines
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Thu, 23 Oct - Tue, 4 Nov
Icelandair Logo
3:45 p.m. - 2:45 p.m.SEA-BCN
14h 00m1 stop
Icelandair Logo
11:45 a.m. - 5:00 p.m.BCN-SEA
14h 15m1 stop
C$ 773Icelandair
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Wed, 22 Oct - Tue, 4 Nov
Icelandair Logo
7:00 p.m. - 2:45 p.m.SEA-BCN
34h 45m1 stop
Icelandair Logo
11:45 a.m. - 5:00 p.m.BCN-SEA
14h 15m1 stop
C$ 776Icelandair
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Wed, 1 Oct - Wed, 8 Oct
British Airways Logo
1:30 p.m. - 3:50 p.m.SEA-BCN
17h 20m1 stop
British Airways Logo
12:20 p.m. - 9:48 p.m.BCN-SEA
18h 28m1 stop
C$ 802British Airways
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Mon, 10 Nov - Tue, 25 Nov
Logo
10:08 p.m. - 7:05 a.m.SEA-BCN
23h 57m1 stop
Logo
12:30 p.m. - 10:15 p.m.BCN-SEA
18h 45m1 stop
C$ 806
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Wed, 22 Oct - Wed, 5 Nov
British Airways Logo
8:20 p.m. - 8:30 p.m.SEA-BCN
15h 10m1 stop
British Airways Logo
7:15 p.m. - 4:55 p.m.BCN-SEA
30h 40m1 stop
C$ 823British Airways
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Tue, 30 Sep - Fri, 17 Oct
United Airlines Logo
7:15 a.m. - 7:50 a.m.SEA-BCN
15h 35m1 stop
United Airlines Logo
12:10 p.m. - 6:31 p.m.BCN-SEA
39h 21m2 stops
C$ 901United Airlines
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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
12:10 p.m. - 11:15 p.m.BCN-SEA
44h 05m3 stops
C$ 902United Airlines
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Sun, 2 Nov - Tue, 18 Nov
Lufthansa Logo
3:40 p.m. - 9:35 a.m.SEA-BCN
32h 55m2 stops
Lufthansa Logo
1:35 p.m. - 7:16 p.m.BCN-SEA
38h 41m2 stops
C$ 919Lufthansa
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Sat, 23 Aug - Wed, 3 Sep
Lufthansa Logo
10:00 a.m. - 7:50 a.m.SEA-BCN
36h 50m2 stops
Lufthansa Logo
12:10 p.m. - 2:16 p.m.BCN-SEA
35h 06m2 stops
C$ 933Lufthansa
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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$ 918 (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$ 1,733 and C$ 1,623 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 24% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

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Good to know

Low seasonJanuary
Cheapest flightC$ 484
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly and prices are also 18% 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$ 352 for a one-way ticket and C$ 511 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?

    oneworld, Star Alliance, 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 7269 reviews
7.0Boarding
6.8Comfort
7.6Crew
6.3Food
6.4Entertainment
Airline reviews

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

2.0 MediocreAnthony, Jul 2025EWR - IND
Read more Lufthansa reviews

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

The food could be better, more snacks. And have some plugs to chargue the phone.

The pasta in the evening meal was tasteless. Otherwise, the flight was okay.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Seating was average for a first class seat. It very modern. I expected better.

Flight was a little late. The crew was courteous, food ok

Bad! Disaster!! The LH419 was cancelled after 4 hrs on board with no AC and no toilets

Poor food on flight between Toronto and Stockholm Airport Toronto too crowded

Extremely pleased with the crew. Best flight attendants ever! Very friendly, genuinely caring and attentive.

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

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)

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