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$318+ Cheap flights from Barcelona-El Prat (BCN) to Seattle (SEA)

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — SEA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Barcelona-El Prat to Seattle/Tacoma Intl are usually found in March or May, booked 25 days in advance, depart on a Tuesday or Saturday and return on a Friday

Cheap flight deals from Barcelona-El Prat to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Barcelona-El Prat (BCN) to Seattle (SEA). 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$637
(Mytrip)

One-way from

$318
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$858
Provider with most accurate pricing for Barcelona-El Prat-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Barcelona-El Prat-Seattle/Tacoma Intl flights.
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From Barcelona-El Prat to Seattle/Tacoma Intl
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One-way flight from Barcelona-El Prat to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 4% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Barcelona-El Prat to Seattle

Cheapest flights from Barcelona-El Prat to Seattle
Explore the most affordable flight options available from Barcelona-El Prat to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1710:50 amBCN - SEA
1 stop16h 30mMultiple Airlines
Sun 11/308:05 pmSEA - BCN
1 stop15h 30mMultiple Airlines
Deal found 10/28$637
This lastminute.com deal was found by Cheapflights users on 10/30. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:30 amBCN - SEA
1 stop15h 50mAer Lingus
Wed 12/108:05 pmSEA - BCN
1 stop15h 20mAer Lingus
Deal found 10/30$638
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1711:30 amBCN - SEA
1 stop15h 50mAer Lingus
Sun 11/308:05 pmSEA - BCN
1 stop15h 20mAer Lingus
Deal found 10/28$642
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/207:00 amBCN - SEA
2 stops21h 50mMultiple Airlines
Thu 12/49:00 amSEA - BCN
1 stop17h 55mMultiple Airlines
Deal found 10/27$771
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2211:30 amBCN - SEA
1 stop15h 50mAer Lingus
Sun 12/288:05 pmSEA - BCN
1 stop15h 20mAer Lingus
Deal found 10/28$777
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:50 amBCN - SEA
1 stop14h 20mLufthansa
Wed 4/228:00 amSEA - BCN
1 stop15h 20mLufthansa
Deal found 10/30$791
This Flighttix deal was found by Cheapflights users on 10/27. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:50 amBCN - SEA
1 stop14h 20mLufthansa
Thu 12/42:00 pmSEA - BCN
1 stop14h 05mLufthansa
Deal found 10/27$798
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:50 amBCN - SEA
1 stop14h 20mLufthansa
Wed 12/33:10 pmSEA - BCN
1 stop14h 35mLufthansa
Deal found 10/28$799
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/229:10 pmBCN - SEA
2 stops44h 27mMultiple Airlines
Wed 12/311:10 pmSEA - BCN
1 stop27h 45mMultiple Airlines
Deal found 10/28$801
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/205:50 amBCN - SEA
1 stop15h 20mLufthansa
Thu 4/232:20 pmSEA - BCN
1 stop16h 10mLufthansa
Deal found 10/28$802
This Flighttix deal was found by Cheapflights users on 10/30. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:50 amBCN - SEA
2 stops24h 26mAir Canada
Thu 11/275:50 amSEA - BCN
2 stops18h 45mAir Canada
Deal found 10/30$807

Cheapflights Fare Finder

 
Customize your flight search to find flights from Barcelona-El Prat to Seattle 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 October 30, 2025.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to Seattle that are best for you.

Fly from

Barcelona-El Prat

Fly to

Seattle

Route

Depart

Return

Price

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 11/24

11:30 am-6:20 pm

1 stop15h 50m

Seattle/Tacoma Intl

Wed 12/10

8:05 pm-8:25 pm

1 stop15h 20m

$638

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Sat 1/31

6:50 am-12:10 pm

1 stop14h 20m

Seattle/Tacoma Intl

Tue 2/10

7:00 am-9:00 am

2 stops17h 00m

$774

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 12/22

11:30 am-6:20 pm

1 stop15h 50m

Seattle/Tacoma Intl

Sun 12/28

8:05 pm-8:25 pm

1 stop15h 20m

$777

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Sat 1/31

12:30 pm-10:07 pm

1 stop18h 37m

Seattle/Tacoma Intl

Tue 2/10

2:09 pm-5:20 pm

2 stops18h 11m

$780

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Wed 4/8

6:30 pm-1:26 pm

1 stop27h 56m

Seattle/Tacoma Intl

Wed 4/22

3:10 pm-12:10 am

2 stops24h 00m

$785

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Fri 11/21

6:50 am-12:10 pm

1 stop14h 20m

Seattle/Tacoma Intl

Wed 4/22

8:00 am-8:20 am

1 stop15h 20m

$791

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Thu 11/13

6:50 am-10:16 pm

2 stops24h 26m

Seattle/Tacoma Intl

Thu 11/27

5:50 am-9:35 am

2 stops18h 45m

$807

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Sat 11/22

5:50 am-12:10 pm

1 stop15h 20m

Seattle/Tacoma Intl

Wed 12/3

3:10 pm-2:45 pm

1 stop14h 35m

$811

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 11/24

5:50 am-12:10 pm

1 stop15h 20m

Seattle/Tacoma Intl

Wed 12/10

5:50 am-9:35 am

2 stops18h 45m

$812

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 11/24

6:50 am-12:10 pm

1 stop14h 20m

Seattle/Tacoma Intl

Wed 12/10

7:00 am-9:00 am

2 stops17h 00m

$814

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 19 results
1
2

Compare providers for flights from Barcelona-El Prat to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Barcelona-El Prat to Seattle in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Barcelona-El Prat Airport-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Barcelona-El Prat Airport-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Barcelona-El Prat Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Barcelona-El Prat Airport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Barcelona-El Prat Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Barcelona-El Prat to Seattle. Price data was last updated on October 24, 2025.

The price you pay for your flight from Barcelona-El Prat Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 25 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 Barcelona-El Prat Airport to Seattle?

Currently, February is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Seattle (average of $335). Flying from Barcelona-El Prat Airport to Seattle in July is currently the most expensive (average of $838). 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 BCN to SEA?

Find hourly flight availability from Barcelona-El Prat to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 28% on flights from Barcelona-El Prat Airport to Seattle by exploring options for tickets in the morning.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated October 30, 2025.
See what other customers who have flown with Delta, KLM, and Lufthansa from Barcelona-El Prat Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
KLM
7.7
Good
1,406 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Lufthansa
6.8
Okay
7,541 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
British Airways
6.7
Okay
7,487 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

Related info for your journey

Find useful and relevant information for your journey from Barcelona-El Prat to Seattle. 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 into for flights to Seattle from Barcelona-El Prat?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Barcelona-El Prat to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Barcelona-El Prat; the airport handles an average of 0 inbound flights from Barcelona-El Prat per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the Seattle airport from Barcelona-El Prat. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • How long is the flight from Barcelona-El Prat Airport to Seattle?

    Airlines like Aer Lingus and United Airlines fly from Barcelona-El Prat Airport to Seattle in about 14h 20m. The time it takes to get you to your destination can typically vary by up to 1h 30m. Barcelona-El Prat Airport and Seattle are separated by a distance of 5421 mi. This flight may include one or multiple stops.

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

    According to our current data, KLM ($677), Delta ($686), and Lufthansa ($712) offers the cheapest pricing from Barcelona-El Prat Airport to Seattle. Users have found that KLM is 22% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Seattle (average of $335). Flying from Barcelona-El Prat Airport to Seattle in July is currently the most expensive (average of $838). 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
SeaTac
Tukwila
Tacoma
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Fife
Issaquah

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Alternative routes for Barcelona-El Prat to Seattle

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

Top 4 airlines flying from Barcelona-El Prat to Seattle

Discover the top 4 airlines that operate flights from Barcelona-El Prat to Seattle. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$677Average$854FlexibilityNo cancel feeOn-time75%
DeltaCheapest$686Average$849FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$712Average$803FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$768Average$973FlexibilityNo cancel feeOn-time70%

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