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$243+ Cheap flights from Seattle (SEA) to Barcelona

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Barcelona are usually found in November or February, booked 4 days in advance, depart on a Monday or Friday and return on a Tuesday

Cheap flight deals from Seattle to Barcelona

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Barcelona (S37). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 20, 2025.

Round-trip from

$609
(FlightHub)

One-way from

$243
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$712
From Seattle/Tacoma Intl to Barcelona
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One-way flight from Seattle/Tacoma Intl to Barcelona
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Highest demand for flights based on searches. 24% potential increase in price ($280 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Seattle to Barcelona

Cheapest flights from Seattle to Barcelona
Explore the most affordable flight options available from Seattle to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/174:20 pmSEA - BCN
1 stop16h 50mScandinavian Airlines
Thu 9/2510:30 amBCN - SEA
2 stops36h 30mScandinavian Airlines
Deal found 8/18$609
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:20 pmSEA - BCN
2 stops33h 20mScandinavian Airlines
Mon 10/137:00 pmBCN - SEA
2 stops34h 50mScandinavian Airlines
Deal found 8/17$612
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:20 pmSEA - BCN
2 stops33h 20mScandinavian Airlines
Wed 10/157:00 pmBCN - SEA
2 stops52h 44mScandinavian Airlines
Deal found 8/17$618
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/152:00 pmSEA - BCN
2 stops43h 20mScandinavian Airlines
Wed 11/267:10 pmBCN - SEA
2 stops37h 14mScandinavian Airlines
Deal found 8/17$625
This Scandinavian Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:55 amSEA - BCN
2 stops22h 25mScandinavian Airlines
Fri 12/57:10 pmBCN - SEA
2 stops36h 03mScandinavian Airlines
Deal found 8/19$626
This oojo deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/104:00 pmSEA - BCN
1 stop17h 10mScandinavian Airlines
Thu 9/2510:25 amBCN - SEA
1 stop36h 35mScandinavian Airlines
Deal found 8/19$627
This FlightHub deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:35 pmSEA - BCN
1 stop17h 50mAer Lingus
Wed 10/811:00 amBCN - SEA
1 stop15h 50mAer Lingus
Deal found 8/20$629
This Scandinavian Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/174:20 pmSEA - BCN
1 stop16h 50mScandinavian Airlines
Sat 10/117:00 pmBCN - SEA
1 stop28h 00mScandinavian Airlines
Deal found 8/20$631
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:55 pmSEA - BCN
2 stops39h 15mScandinavian Airlines
Tue 10/147:00 pmBCN - SEA
2 stops36h 25mScandinavian Airlines
Deal found 8/17$632
This FlightHub deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:35 pmSEA - BCN
1 stop17h 50mAer Lingus
Wed 10/811:00 amBCN - SEA
1 stop15h 50mAer Lingus
Deal found 8/19$634
This Scandinavian Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/162:25 pmSEA - BCN
2 stops34h 10mScandinavian Airlines
Thu 10/910:25 amBCN - SEA
1 stop36h 35mScandinavian Airlines
Deal found 8/20$635

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Barcelona that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Seattle to Barcelona that are best for you.

Fly from

Seattle

Fly to

Barcelona

Route

Depart

Return

Price

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 9/17

4:20 pm-6:10 pm

1 stop16h 50m

Barcelona-El Prat

Thu 9/25

10:30 am-2:00 pm

2 stops36h 30m

$609

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 10/3

4:20 pm-10:40 am

2 stops33h 20m

Barcelona-El Prat

Mon 10/13

7:00 pm-8:50 pm

2 stops34h 50m

$612

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 10/3

4:20 pm-10:40 am

2 stops33h 20m

Barcelona-El Prat

Sat 10/18

9:40 am-2:44 pm

2 stops38h 04m

$618

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 10/3

4:20 pm-10:40 am

2 stops33h 20m

Barcelona-El Prat

Wed 10/15

7:00 pm-2:44 pm

2 stops52h 44m

$618

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 11/15

2:00 pm-6:20 pm

2 stops43h 20m

Barcelona-El Prat

Thu 11/27

7:10 pm-11:24 pm

2 stops37h 14m

$625

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 11/15

7:20 am-6:20 pm

2 stops26h 00m

Barcelona-El Prat

Thu 11/20

7:10 pm-10:23 pm

2 stops36h 13m

$625

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 11/16

12:00 pm-6:20 pm

2 stops45h 20m

Barcelona-El Prat

Wed 11/26

7:10 pm-11:24 pm

2 stops37h 14m

$625

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 9/5

5:50 pm-6:10 pm

2 stops39h 20m

Barcelona-El Prat

Thu 9/18

10:25 am-10:25 pm

2 stops21h 00m

$625

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/7

2:10 pm-9:35 am

2 stops34h 25m

Barcelona-El Prat

Tue 10/14

7:00 pm-8:50 pm

2 stops34h 50m

$625

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 11/18

2:00 pm-6:20 pm

2 stops43h 20m

Barcelona-El Prat

Thu 11/27

7:10 pm-11:24 pm

2 stops37h 14m

$625

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 20 results
1
2

Best time to book a flight from Seattle to Barcelona

Have a flexible travel schedule? Discover the best time to fly to Barcelona from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Barcelona

How far ahead should I book a flight from Seattle to Barcelona?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Barcelona. Price data was last updated on August 8, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Barcelona, you should look to book at least 4 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Barcelona?

Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona (average of $523). Flying from Seattle to Barcelona in June is currently the most expensive (average of $1,057). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to BCN?

Find hourly flight availability from Seattle to Barcelona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Barcelona in the evening. If you’re flexible enough to do this you can expect to save up to 54% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Seattle to Barcelona?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Barcelona. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Barcelona flight should consider departing on Wednesday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Barcelona

Get insights into the airlines that provide service to Barcelona. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Barcelona. Reviews last updated August 20, 2025.
Read through reviews of airlines operating flights from Seattle to Barcelona, such as Delta, United Airlines, and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,928 reviews
Delta
8.0
Very good
7,982 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Icelandair
7.0
Good
529 reviews
Delta
8.0
Very good
7,982 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,337 reviews
Delta
8.0
Very good
7,982 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.7
Okay
7,289 reviews
Delta
8.0
Very good
7,982 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Barcelona. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Barcelona?

    For a flight from Seattle to Barcelona, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 0 outbound flights to Barcelona per day. 15 airlines have flights to Barcelona from Seattle/Tacoma Intl on a regular basis.

  • How long is the flight from Seattle to Barcelona?

    Departing from Seattle to Barcelona will take you 16h 50m. The distance from Seattle to Barcelona is about 5421 mi.

  • What are the cheapest airlines flying from Seattle to Barcelona round-trip?

    Our cheapest airline available from Seattle to Barcelona is Icelandair. Our recent data shows that you can find tickets from as low as $414 on this airline. Additional options worth looking into are Scandinavian Airlines and Air Canada, starting at $465 and $484 round-trip. Users have found that Icelandair is 51% cheaper than the other options available to this destination.

  • What are the cheapest flights from Seattle to Barcelona?

    On average you can expect to pay $1,924 for a flight from Seattle to Barcelona. The cheapest flight overall is $1,258 while the most popular route, (Seattle/Tacoma Intl - Barcelona-El Prat) is currently priced at $405.

  • Where are the most common layover locations when flying from Seattle to Barcelona?

    Seattle to Barcelona flights have a layover in London most often. Paris is the second most popular location for layovers on flights from Seattle to Barcelona. Frankfurt am Main comes next as the third most popular layover location for Seattle to Barcelona flights.

  • What are some popular things to do or see while on a layover in London?

    Most London visitors opt to spend their time experiencing Hyde Park, Buckingham Palace, and Piccadilly Circus. Hyde Park, Buckingham Palace and Piccadilly Circus are located about 12.5 mi, 13.7 mi, and 14.1 mi, respectively from London Heathrow if you are interested in checking them out. Those on a layover in London in need of a rental car can book one at London Heathrow for about $41.

  • What are some popular points of interest to see during a layover in Paris?

    Most Paris visitors opt to spend their time at Eiffel Tower, Champs-Elysées, and Louvre Museum. Those on a layover in Paris interested in visiting Eiffel Tower, Champs-Elysées, or Louvre Museum can do so by traveling 15.8 mi, 14.7 mi, and 14.3 mi, respectively from Paris Charles de Gaulle. Those landing in Paris looking to spend some time exploring during their layover can rent a car for about $42 per day.

  • What are points of interest worth seeing during a layover in Frankfurt am Main?

    The majority of Frankfurt am Main visitors spend their time at Römerberg, Hauptwache, and Historisches Museum Frankfurt. Those on a layover in Frankfurt am Main interested in visiting Römerberg, Hauptwache, or Historisches Museum Frankfurt can do so by traveling 7.4 mi, 7.4 mi, and 7.3 mi, respectively from Frankfurt am Main. Travelers can book a car rental at Frankfurt am Main for about $42 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Seattle to Barcelona flights?

    Flights departing from Seattle and landing in Barcelona layover in Amsterdam least frequently. Amsterdam is followed by Calgary in terms of the least popular layover location on flights from Seattle to Barcelona. Reykjavik sees the third fewest flights with layovers for the Seattle to Barcelona route.

  • Can I find deals for flights from Seattle to Barcelona that include hotel bookings?

    Yes. In addition to deals on Seattle to Barcelona flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Barcelona?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Barcelona.

  • Can I find deals for business class flights from Seattle to Barcelona?

    Yes. Cheapflights offers flight deals from Seattle to Barcelona by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Barcelona?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona (average of $523). Flying from Seattle to Barcelona in June is currently the most expensive (average of $1,057). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Seattle to Barcelona

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Barcelona-El Prat flights
Portland to Barcelona-El Prat flights
Spokane to Barcelona-El Prat flights

Top 10 airlines flying from Seattle to Barcelona

Discover the top 10 airlines that operate flights from Seattle to Barcelona. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$414Average$615FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$465Average$568FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$484Average$711FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$489Average$745FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$507Average$810FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$557Average$788FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$558Average$826FlexibilityNo cancel feeOn-time69%
KLMCheapest$574Average$888FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$581Average$871FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$590Average$833FlexibilityNo cancel feeOn-time71%

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