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$239+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 31 days in advance, depart on a Monday or Tuesday 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 June 12, 2025.

Round-trip from

$657
(SmartFares)

One-way from

$239
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,262
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 ($286 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This SmartFares deal was found by Cheapflights users on 6/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/244:00 pmSEA - BCN
1 stop17h 10mScandinavian Airlines
Sat 9/67:00 pmBCN - SEA
2 stops50h 34mScandinavian Airlines
Deal found 6/11$657
This Gotogate deal was found by Cheapflights users on 6/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/191:45 pmSEA - BCN
2 stops20h 25mMultiple Airlines
Sun 9/286:50 amBCN - SEA
2 stops24h 26mMultiple Airlines
Deal found 6/11$658
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/11:00 pmSEA - BCN
3 stops33h 50mUnited Airlines
Sun 10/512:10 pmBCN - SEA
2 stops39h 39mUnited Airlines
Deal found 6/10$659
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/107:15 pmSEA - BCN
2 stops27h 35mAir Canada
Sat 10/1812:10 pmBCN - SEA
2 stops34h 00mAir Canada
Deal found 6/11$668
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/93:10 pmSEA - BCN
1 stop14h 35mLufthansa
Sat 11/156:20 pmBCN - SEA
1 stop28h 00mLufthansa
Deal found 6/10$669
This Austrian Airlines deal was found by Cheapflights users on 6/10. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:00 amSEA - BCN
2 stops41h 10mAustrian Airlines
Tue 11/188:30 pmBCN - SEA
2 stops31h 27mAustrian Airlines
Deal found 6/10$679
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:00 amSEA - BCN
1 stop17h 40mDelta
Sat 11/1510:55 amBCN - SEA
1 stop22h 19mDelta
Deal found 6/10$682
This FlightHub deal was found by Cheapflights users on 6/10. 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 8/297:35 pmSEA - BCN
1 stop17h 50mAer Lingus
Fri 11/2811:30 amBCN - SEA
1 stop15h 50mAer Lingus
Deal found 6/10$712
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/142:50 pmSEA - BCN
2 stops23h 45mSWISS
Mon 8/258:00 pmBCN - SEA
2 stops31h 36mSWISS
Deal found 6/10$713
This FlightHub deal was found by Cheapflights users on 6/10. 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 7/97:10 pmSEA - BCN
1 stop19h 00mTurkish Airlines
Wed 7/166:30 pmBCN - SEA
1 stop25h 05mTurkish Airlines
Deal found 6/10$717
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2912:59 amSEA - BCN
1 stop24h 31mAlaska Airlines
Fri 10/1712:50 pmBCN - SEA
1 stop18h 10mAlaska Airlines
Deal found 6/11$772
This Icelandair deal was found by Cheapflights users on 6/12. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:35 pmSEA - BCN
1 stop13h 35mIcelandair
Tue 12/911:45 amBCN - SEA
2 stops19h 05mIcelandair
Deal found 6/12$801

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 June 12, 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

Sun 8/24

4:00 pm-6:10 pm

1 stop17h 10m

Barcelona-El Prat

Sat 9/6

7:00 pm-12:34 pm

2 stops50h 34m

$657

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 8/14

7:20 am-7:50 am

1 stop15h 30m

Barcelona-El Prat

Fri 8/22

12:10 pm-3:34 pm

2 stops36h 24m

$660

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 8/14

5:30 am-7:50 am

2 stops17h 20m

Barcelona-El Prat

Fri 8/22

1:15 pm-10:16 pm

2 stops18h 01m

$663

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 9/2

7:15 am-7:50 am

1 stop15h 35m

Barcelona-El Prat

Sat 9/13

12:10 pm-7:31 pm

1 stop16h 21m

$673

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 8/14

7:35 pm-10:25 pm

1 stop17h 50m

Barcelona-El Prat

Mon 8/25

11:00 am-5:50 pm

1 stop15h 50m

$685

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 8/14

2:50 pm-11:35 pm

2 stops23h 45m

Barcelona-El Prat

Mon 8/25

8:00 pm-6:36 pm

2 stops31h 36m

$713

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 7/9

7:10 pm-11:10 pm

1 stop19h 00m

Barcelona-El Prat

Wed 7/16

6:30 pm-10:35 am

1 stop25h 05m

$717

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 7/9

6:50 pm-5:55 pm

1 stop14h 05m

Barcelona-El Prat

Wed 7/16

6:50 am-11:55 am

1 stop14h 05m

$796

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 8/21

7:44 am-10:10 am

1 stop17h 26m

Barcelona-El Prat

Sat 8/30

10:45 am-8:02 pm

1 stop18h 17m

$804

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 7/5

7:05 am-12:25 pm

1 stop20h 20m

Barcelona-El Prat

Sun 7/13

2:25 pm-8:28 pm

1 stop15h 03m

$823

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 26 results
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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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Barcelona, you should look to book at least 31 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 $1,062). 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 June 12, 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 11% on your trip compared to booking a flight at noon.

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.

Rainfall in Barcelona by month

Plan your trip to Barcelona by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Barcelona ranges from 0.8 - 3.6 inches per month. October is typically the wettest month, when rainfall can reach 3.6 in. July is typically the driest time to visit Barcelona when rainfall is around 0.8 in.

Temperature in Barcelona by month

Plan your trip to Barcelona by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Barcelona, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from Seattle to Barcelona, such as Delta, Alaska Airlines and SWISS. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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!
Turkish Airlines
7.3
Good
3,848 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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.

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

    Our cheapest airline available from Seattle to Barcelona is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $657 on this airline. Additional options worth looking into are United Airlines and Air Canada, starting at $660 and $673 round-trip. Users have found that Scandinavian Airlines is 25% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Barcelona one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $290. However, be on the lookout for offers from Icelandair and Scandinavian Airlines, as they are both options that can get you from Seattle to Barcelona for a low price.

  • 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 $44.

  • 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 $39 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 Konstablerwache. Those on a layover in Frankfurt am Main interested in visiting Römerberg, Hauptwache, or Konstablerwache can do so by traveling 7.4 mi, 7.4 mi, and 7.7 mi, respectively from Frankfurt am Main. Travelers can book a car rental at Frankfurt am Main for about $43 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 Chicago least frequently. Chicago is followed by Calgary in terms of the least popular layover location on flights from Seattle to Barcelona. Amsterdam 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 $1,062). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$416Average$633FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$443Average$560FlexibilityNo cancel feeOn-time77%
WestJetCheapest$445Average$966FlexibilityNo cancel feeOn-time60%
Aer LingusCheapest$470Average$755FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$489Average$808FlexibilityNo cancel feeOn-time67%
IberiaCheapest$507Average$799FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$558Average$808FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$560Average$838FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$561Average$848FlexibilityNo cancel feeOn-time69%
KLMCheapest$568Average$899FlexibilityNo cancel feeOn-time75%

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