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$471+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Round-trip from

$591
(Scandinavian Airlines)

One-way from

$471
(WestJet)

Popular in

June

Cheapest in

November

Average price

$742
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 ($287 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 3/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:20 amSEA - BCN
2 stops25h 50mScandinavian Airlines
Tue 9/307:00 pmBCN - SEA
1 stop28h 00mScandinavian Airlines
Deal found 3/30$591
This Mytrip deal was found by Cheapflights users on 3/31. 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.
Wed 5/143:45 pmSEA - BCN
2 stops16h 25mMultiple Airlines
Wed 5/217:30 amBCN - SEA
2 stops19h 20mMultiple Airlines
Deal found 3/31$592
This United deal was found by Cheapflights users on 3/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:00 amSEA - BCN
1 stop16h 20mUnited Airlines
Fri 11/77:45 amBCN - SEA
1 stop14h 35mUnited Airlines
Deal found 3/30$630
This American Airlines deal was found by Cheapflights users on 3/29. 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.
Mon 11/106:50 pmSEA - BCN
1 stop16h 00mAmerican Airlines
Mon 11/177:55 pmBCN - SEA
1 stop24h 25mAmerican Airlines
Deal found 3/29$631
This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/92:35 pmSEA - BCN
1 stop13h 35mIcelandair
Sun 11/2311:45 amBCN - SEA
1 stop14h 15mIcelandair
Deal found 3/30$643
This Delta deal was found by Cheapflights users on 3/30. 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.
Sun 10/267:20 amSEA - BCN
2 stops19h 05mDelta
Fri 11/711:10 amBCN - SEA
2 stops20h 15mDelta
Deal found 3/30$663
This WestJet deal was found by Cheapflights users on 3/29. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/132:05 pmSEA - BCN
1 stop13h 20mWestJet
Wed 5/212:25 pmBCN - SEA
1 stop15h 03mWestJet
Deal found 3/29$665
This Air Canada deal was found by Cheapflights users on 3/30. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:05 pmSEA - BCN
2 stops29h 45mAir Canada
Sun 1/119:50 amBCN - SEA
2 stops33h 50mAir Canada
Deal found 3/30$678
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:50 pmSEA - BCN
1 stop16h 20mBritish Airways
Sun 1/116:40 amBCN - SEA
1 stop19h 15mBritish Airways
Deal found 3/30$683
This Expedia deal was found by Cheapflights users on 3/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/308:20 pmSEA - BCN
1 stop15h 10mIberia
Tue 5/69:20 pmBCN - SEA
1 stop23h 15mIberia
Deal found 3/30$689
This Justfly.com deal was found by Cheapflights users on 3/30. 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.
Tue 4/227:10 pmSEA - BCN
1 stop36h 55mTurkish Airlines
Tue 4/2912:00 pmBCN - SEA
1 stop38h 15mTurkish Airlines
Deal found 3/30$697
This Lufthansa deal was found by Cheapflights users on 3/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:00 pmSEA - BCN
1 stop17h 15mLufthansa
Wed 12/316:50 amBCN - SEA
1 stop14h 20mLufthansa
Deal found 3/30$734

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 March 31, 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

Tue 9/9

7:20 am-6:10 pm

2 stops25h 50m

Barcelona-El Prat

Tue 9/30

7:00 pm-2:00 pm

1 stop28h 00m

$591

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 5/14

3:45 pm-5:10 pm

2 stops16h 25m

Barcelona-El Prat

Wed 5/21

7:30 am-5:50 pm

2 stops19h 20m

$592

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 5/13

2:05 pm-12:25 pm

1 stop13h 20m

Barcelona-El Prat

Wed 5/21

2:25 pm-8:28 pm

1 stop15h 03m

$665

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 4/30

8:20 pm-8:30 pm

1 stop15h 10m

Barcelona-El Prat

Tue 5/6

9:20 pm-11:35 am

1 stop23h 15m

$689

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 4/22

7:10 pm-5:05 pm

1 stop36h 55m

Barcelona-El Prat

Tue 4/29

12:00 pm-5:15 pm

1 stop38h 15m

$697

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 4/26

7:00 pm-2:45 pm

1 stop34h 45m

Barcelona-El Prat

Wed 5/7

3:45 pm-8:40 pm

1 stop13h 55m

$703

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 5/14

5:40 pm-8:05 pm

1 stop17h 25m

Barcelona-El Prat

Wed 5/21

10:05 am-4:00 pm

1 stop14h 55m

$760

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 4/29

8:15 am-8:20 am

1 stop15h 05m

Barcelona-El Prat

Tue 5/6

12:15 pm-4:22 pm

2 stops37h 07m

$768

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 5/11

7:20 am-7:50 am

1 stop15h 30m

Barcelona-El Prat

Thu 5/22

12:15 pm-10:13 pm

2 stops42h 58m

$775

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 4/22

1:30 pm-11:55 am

1 stop13h 25m

Barcelona-El Prat

Wed 4/30

10:45 am-11:09 pm

1 stop21h 24m

$790

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 31 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 March 28, 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 $1,080). 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 March 31, 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 March 31, 2025.
Read through reviews of airlines operating flights from Seattle to Barcelona, such as Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Entertainment

7.9

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.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Entertainment

7.9

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.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
1,570 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Entertainment

7.9

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
1,425 reviews
Delta
8.0
Very good
7,899 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Entertainment

7.9

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 Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $591 on this airline. Additional options worth looking into are WestJet and Iberia, starting at $665 and $689 round-trip. Users have found that Scandinavian Airlines is 34% 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 $471. However, be on the lookout for offers from Turkish Airlines and Icelandair, 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. Calgary 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 $39.

  • 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 $41 per day.

  • What are points of interest worth seeing during a layover in Calgary?

    The majority of Calgary visitors spend their time at Calgary Tower, Heritage Park Historical Village, and TELUS Spark. Those on a layover in Calgary interested in visiting Calgary Tower, Heritage Park Historical Village, or TELUS Spark can do so by traveling 5.9 mi, 10.5 mi, and 6.2 mi, respectively from Calgary. Travelers can book a car rental at Calgary for about $45 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 $1,080). 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$416Average$651FlexibilityNo cancel feeOn-time76%
WestJetCheapest$445Average$899FlexibilityNo cancel feeOn-time60%
Scandinavian AirlinesCheapest$489Average$643FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$502Average$827FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$507Average$799FlexibilityNo cancel feeOn-time77%
KLMCheapest$540Average$882FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$579Average$881FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$587Average$869FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$588Average$935FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$588Average$989FlexibilityNo cancel feeOn-time67%
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