HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Barcelona-El Prat

$239+ Cheap flights from Seattle (SEA) to Barcelona-El Prat (BCN)

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
Jul 1 — Jul 81
Tue 7/1
Tue 7/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Barcelona-El Prat with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Barcelona-El Prat 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-El Prat

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Barcelona-El Prat (BCN). 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 26, 2025.

Round-trip from

$595
(Mytrip)

One-way from

$239
(Trip.com)

Popular in

June

Cheapest in

November

Average price

$1,262
From Seattle/Tacoma Intl to Barcelona-El Prat
Search Deals
One-way flight from Seattle/Tacoma Intl to Barcelona-El Prat
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($282 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Seattle to Barcelona-El Prat

Cheapest flights from Seattle to Barcelona-El Prat
Explore the most affordable flight options available from Seattle to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

This Booking.com deal was found by Cheapflights users on 6/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:30 amSEA - BCN
2 stops42h 05mMultiple Airlines
Wed 11/197:45 amBCN - SEA
1 stop14h 35mMultiple Airlines
Deal found 6/24$594
This Delta deal was found by Cheapflights users on 6/24. 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 11/302:00 pmSEA - BCN
1 stop15h 00mDelta
Tue 12/1610:15 amBCN - SEA
1 stop21h 01mDelta
Deal found 6/24$597
This Gotogate deal was found by Cheapflights users on 6/26. 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.
Mon 8/115:30 amSEA - BCN
2 stops17h 20mAir Canada
Wed 8/2712:10 pmBCN - SEA
1 stop17h 31mAir Canada
Deal found 6/26$599
This FlightHub deal was found by Cheapflights users on 6/26. 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.
Sat 9/67:35 pmSEA - BCN
1 stop17h 50mAer Lingus
Tue 9/1611:00 amBCN - SEA
1 stop15h 50mAer Lingus
Deal found 6/26$603
This United Airlines deal was found by Cheapflights users on 6/25. 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 12/245:07 amSEA - BCN
2 stops24h 38mUnited Airlines
Fri 1/96:50 amBCN - SEA
1 stop14h 20mUnited Airlines
Deal found 6/25$604
This Scandinavian Airlines deal was found by Cheapflights users on 6/25. 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 9/14:00 pmSEA - BCN
1 stop17h 10mScandinavian Airlines
Mon 9/87:00 pmBCN - SEA
2 stops52h 38mScandinavian Airlines
Deal found 6/25$606
This FlightHub deal was found by Cheapflights users on 6/26. 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 8/123:45 pmSEA - BCN
1 stop14h 00mIcelandair
Mon 8/253:45 pmBCN - SEA
1 stop13h 55mIcelandair
Deal found 6/26$629
This Virgin Atlantic deal was found by Cheapflights users on 6/26. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/911:30 amSEA - BCN
1 stop36h 50mVirgin Atlantic
Fri 8/2211:35 amBCN - SEA
1 stop21h 24mVirgin Atlantic
Deal found 6/26$644
This British Airways deal was found by Cheapflights users on 6/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/181:30 pmSEA - BCN
1 stop24h 25mBritish Airways
Mon 9/228:25 pmBCN - SEA
1 stop23h 45mBritish Airways
Deal found 6/26$648
This Lufthansa deal was found by Cheapflights users on 6/24. 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 11/283:10 pmSEA - BCN
1 stop14h 35mLufthansa
Wed 12/177:45 amBCN - SEA
1 stop14h 35mLufthansa
Deal found 6/24$660
This SWISS deal was found by Cheapflights users on 6/25. 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.
Mon 9/110:00 amSEA - BCN
2 stops24h 10mSWISS
Mon 9/86:35 pmBCN - SEA
2 stops33h 01mSWISS
Deal found 6/25$684
This FlightHub deal was found by Cheapflights users on 6/24. 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.
Thu 7/1012:30 pmSEA - BCN
1 stop19h 35mTurkish Airlines
Wed 7/236:30 pmBCN - SEA
1 stop25h 05mTurkish Airlines
Deal found 6/24$726

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Barcelona-El Prat 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 26, 2025.
Use the filters below to find and compare flights from Seattle to Barcelona-El Prat Airport that are best for you.

Fly from

Seattle

Fly to

Barcelona-El Prat

Route

Depart

Return

Price

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 8/18

3:45 pm-10:50 pm

2 stops22h 05m

Barcelona-El Prat

Mon 8/25

7:05 am-5:50 pm

2 stops19h 45m

$595

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 8/11

7:20 am-7:50 am

1 stop15h 30m

Barcelona-El Prat

Wed 8/27

12:10 pm-8:41 pm

1 stop17h 31m

$597

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 9/6

7:35 pm-10:25 pm

1 stop17h 50m

Barcelona-El Prat

Tue 9/16

11:00 am-5:50 pm

1 stop15h 50m

$603

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 9/1

4:00 pm-6:10 pm

1 stop17h 10m

Barcelona-El Prat

Mon 9/8

7:00 pm-2:38 pm

2 stops52h 38m

$606

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 9/15

7:15 am-7:50 am

1 stop15h 35m

Barcelona-El Prat

Thu 9/25

12:10 pm-6:31 pm

2 stops39h 21m

$610

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 8/12

3:45 pm-2:45 pm

1 stop14h 00m

Barcelona-El Prat

Mon 8/25

3:45 pm-8:40 pm

1 stop13h 55m

$629

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 8/9

11:30 pm-9:20 am

1 stop24h 50m

Barcelona-El Prat

Fri 8/22

9:30 am-10:25 pm

1 stop21h 55m

$630

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 8/9

11:30 am-9:20 am

1 stop36h 50m

Barcelona-El Prat

Fri 8/22

11:35 am-11:59 pm

1 stop21h 24m

$644

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 9/18

1:30 pm-10:55 pm

1 stop24h 25m

Barcelona-El Prat

Mon 9/22

8:25 pm-11:10 am

1 stop23h 45m

$647

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 9/1

10:00 am-7:10 pm

2 stops24h 10m

Barcelona-El Prat

Mon 9/8

6:35 pm-6:36 pm

2 stops33h 01m

$684

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 27 results
1
2
3

Best time to book a flight from Seattle to Barcelona-El Prat

Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat 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-El Prat Airport

How far ahead should I book a flight from Seattle to Barcelona-El Prat Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Barcelona-El Prat. Price data was last updated on June 20, 2025.

The price you pay for your flight from Seattle to Barcelona-El Prat Airport may vary depending on when you book. For the best chance of a lower fare, look to book 31 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Barcelona-El Prat Airport?

Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona-El Prat Airport (average of $523). Flying from Seattle to Barcelona-El Prat Airport 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-El Prat. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 26, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Barcelona-El Prat Airport 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-El Prat Airport?

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

Travelers seeking maximum savings on their Seattle to Barcelona-El Prat Airport 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-El Prat

Get insights into the airlines that provide service to Barcelona-El Prat. 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-El Prat. Reviews last updated June 26, 2025.
See what other customers who have flown with Delta, Alaska Airlines, and SWISS from Seattle to Barcelona-El Prat Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

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
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

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
7,964 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

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
1,649 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

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
8,838 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

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!
Virgin Atlantic
7.4
Good
654 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

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-El Prat. 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-El Prat?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Barcelona-El Prat. 15 airlines have flights from Seattle/Tacoma Intl to Barcelona-El Prat on a regular basis. Booking flights from Seattle/Tacoma Intl to Barcelona-El Prat should not be difficult; the airport handles an average of 0 outbound flights to Barcelona-El Prat per day.

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

    According to our current data, Air Canada ($597), Aer Lingus ($603), and Scandinavian Airlines ($606) offers the cheapest pricing from Seattle to Barcelona-El Prat Airport. Air Canada is priced at 32% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airlines for a one-way flight from Seattle to Barcelona-El Prat Airport are Icelandair ($294), SWISS ($364), and Aer Lingus ($378).

  • Where are the most common layover locations when flying from Seattle to Barcelona-El Prat Airport?

    Seattle to Barcelona-El Prat Airport flights have a layover in London most of the time. Paris sees the second most layovers for non-direct flights flying from Seattle to Barcelona-El Prat Airport. Frankfurt am Main comes in third as the most popular layover location on Seattle to Barcelona-El Prat Airport flights.

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

    London travelers tend to visit Hyde Park, Buckingham Palace, and Piccadilly Circus more than anywhere else. Hyde Park, Buckingham Palace, and Piccadilly Circus are located about 12.5 mi, 13.7 mi, and 14.1 mi, respectively from London Heathrow. 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?

    Eiffel Tower, Champs-Elysées, and Louvre Museum are the most popular attractions in Paris if you're in need of something to do during your layover. Eiffel Tower, Champs-Elysées, and Louvre Museum can be visited by traveling about 15.8 mi, 14.7 mi, and 14.3 mi respectively from Paris Charles de Gaulle. Those looking to explore during their layover in Paris can rent a car from Paris Charles de Gaulle for about $42 per day.

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

    Frankfurt am Main travelers tend to visit Römerberg, Hauptwache, and Konstablerwache more than any other attractions. Römerberg, Hauptwache, and Konstablerwache are located about 7.4 mi, 7.4 mi, and 7.7 mi, respectively from Frankfurt am Main. Travelers can rent a car at Frankfurt am Main for an average daily rate of $42 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Seattle to Barcelona-El Prat Airport flights?

    The least popular layover on flights from Seattle to Barcelona-El Prat Airport is Chicago. Calgary is the second least popular location for layovers on flights from Seattle to Barcelona-El Prat Airport. Reykjavik comes next as the third least popular layover location for Seattle to Barcelona-El Prat Airport flights.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Barcelona-El Prat 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-El Prat Airport?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona-El Prat Airport (average of $523). Flying from Seattle to Barcelona-El Prat Airport 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Calella
Castelldefels
Cadaques
L'Hospitalet de Llobregat
El Prat de Llobregat
Badalona
Pineda de Mar
Santa Susanna

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Barcelona-El Prat

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

Top 10 airlines flying from Seattle to Barcelona-El Prat

Discover the top 10 airlines that operate flights from Seattle to Barcelona-El Prat. 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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$416Average$613FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$443Average$560FlexibilityNo cancel feeOn-time77%
WestJetCheapest$445Average$968FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$489Average$725FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$489Average$745FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$507Average$799FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$557Average$803FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$557Average$836FlexibilityNo cancel feeOn-time69%
KLMCheapest$568Average$890FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$581Average$888FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.