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$415+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
May 6 — May 131
Tue 5/6
Tue 5/13
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 11 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 May 1, 2025.

Round-trip from

$704
(United Airlines)

One-way from

$415
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,043
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. 23% potential increase in price ($281 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This FlightHub deal was found by Cheapflights users on 4/29. 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 8/274:00 pmSEA - BCN
1 stop17h 10mScandinavian Airlines
Sun 9/711:25 amBCN - SEA
2 stops35h 25mScandinavian Airlines
Deal found 4/29$703
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 5/2012:45 pmSEA - BCN
1 stop16h 15mUnited Airlines
Tue 11/181:35 pmBCN - SEA
3 stops38h 24mUnited Airlines
Deal found 4/30$704
This Justfly.com deal was found by Cheapflights users on 4/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/102:55 pmSEA - BCN
2 stops31h 55mAir Canada
Sat 10/1812:10 pmBCN - SEA
2 stops35h 06mAir Canada
Deal found 4/30$707
This Orbitz deal was found by Cheapflights users on 4/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:18 amSEA - BCN
1 stop19h 12mIberia
Mon 9/299:10 pmBCN - SEA
2 stops31h 54mIberia
Deal found 4/28$708
This Lufthansa deal was found by Cheapflights users on 4/29. 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.
Fri 10/176:50 pmSEA - BCN
1 stop17h 50mLufthansa
Mon 10/273:30 pmBCN - SEA
1 stop30h 50mLufthansa
Deal found 4/29$709
This SWISS deal was found by Cheapflights users on 4/28. 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.
Tue 9/1610:55 amSEA - BCN
2 stops47h 15mSWISS
Mon 9/298:00 pmBCN - SEA
2 stops31h 36mSWISS
Deal found 4/28$710
This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/308:25 amSEA - BCN
2 stops27h 25mMultiple Airlines
Sun 6/152:25 pmBCN - SEA
1 stop31h 33mMultiple Airlines
Deal found 4/30$713
This Delta deal was found by Cheapflights users on 4/30. 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.
Wed 5/76:00 amSEA - BCN
2 stops20h 15mDelta
Wed 5/1412:20 pmBCN - SEA
2 stops19h 57mDelta
Deal found 4/30$717
This FlightHub deal was found by Cheapflights users on 4/29. 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.
Tue 5/207:10 pmSEA - BCN
1 stop33h 30mTurkish Airlines
Tue 5/2712:00 pmBCN - SEA
1 stop38h 15mTurkish Airlines
Deal found 4/29$725
This Travelocity deal was found by Cheapflights users on 4/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/26:45 pmSEA - BCN
1 stop18h 40mAer Lingus
Thu 5/811:00 amBCN - SEA
1 stop14h 59mAer Lingus
Deal found 4/30$726
This Air France deal was found by Cheapflights users on 4/30. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/56:35 pmSEA - BCN
1 stop16h 45mAir France
Mon 5/129:30 amBCN - SEA
1 stop18h 17mAir France
Deal found 4/30$743
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/147:44 amSEA - BCN
1 stop17h 26mAmerican Airlines
Sat 8/2310:45 amBCN - SEA
1 stop18h 17mAmerican Airlines
Deal found 4/29$762

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 May 1, 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 8/27

4:00 pm-6:10 pm

1 stop17h 10m

Barcelona-El Prat

Sun 9/7

11:25 am-1:50 pm

2 stops35h 25m

$703

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 5/20

12:45 pm-2:00 pm

1 stop16h 15m

Barcelona-El Prat

Tue 11/18

1:35 pm-6:59 pm

3 stops38h 24m

$704

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 10/10

2:55 pm-7:50 am

2 stops31h 55m

Barcelona-El Prat

Sat 10/18

12:10 pm-2:16 pm

2 stops35h 06m

$707

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 9/16

6:18 am-10:30 am

1 stop19h 12m

Barcelona-El Prat

Mon 9/29

9:10 pm-8:04 pm

2 stops31h 54m

$708

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 10/17

6:50 pm-9:40 pm

1 stop17h 50m

Barcelona-El Prat

Mon 10/27

3:30 pm-2:20 pm

1 stop30h 50m

$709

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 9/16

10:55 am-7:10 pm

2 stops47h 15m

Barcelona-El Prat

Mon 9/29

8:00 pm-6:36 pm

2 stops31h 36m

$710

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 5/30

8:25 am-8:50 pm

2 stops27h 25m

Barcelona-El Prat

Sun 6/15

2:25 pm-12:58 pm

1 stop31h 33m

$713

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 5/19

2:20 pm-5:10 pm

2 stops17h 50m

Barcelona-El Prat

Fri 5/23

12:20 pm-10:51 pm

2 stops19h 31m

$717

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 5/20

7:10 pm-1:40 pm

1 stop33h 30m

Barcelona-El Prat

Tue 5/27

12:00 pm-5:15 pm

1 stop38h 15m

$725

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 8/2

7:49 am-10:10 am

1 stop17h 21m

Barcelona-El Prat

Sun 8/24

10:45 am-8:02 pm

1 stop18h 17m

$747

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 32 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 April 25, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Barcelona, you should look to book at least 11 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 $1,064). 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 May 1, 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 May 1, 2025.
Read through reviews of airlines operating flights from Seattle to Barcelona, such as Delta, Austrian 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
7,934 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
781 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 United Airlines. Our recent data shows that you can find tickets from as low as $704 on this airline. Additional options worth looking into are Lufthansa and Delta, starting at $707 and $717 round-trip. Users have found that United Airlines is 22% 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 Scandinavian Airlines, with whom users have recently found tickets for as low as $417. However, be on the lookout for offers from WestJet and Turkish 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, Piccadilly Circus, and Buckingham Palace. Hyde Park, Piccadilly Circus and Buckingham Palace are located about 12.5 mi, 14.1 mi, and 13.7 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 $53.

  • 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 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 Dublin least frequently. Dublin is followed by Chicago 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 $1,064). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$416Average$658FlexibilityNo cancel feeOn-time76%
WestJetCheapest$445Average$908FlexibilityNo cancel feeOn-time60%
Scandinavian AirlinesCheapest$489Average$643FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$502Average$808FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$507Average$811FlexibilityNo cancel feeOn-time77%
KLMCheapest$568Average$891FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$574Average$848FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$581Average$918FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$582Average$965FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$584Average$854FlexibilityNo cancel feeOn-time71%

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