$596+ Cheap flights from Barcelona-El Prat (BCN) to Seattle (SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — SEA
Aug 18 — Aug 251
Round-trip
1 adult, Economy
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Find cheap flights from Barcelona-El Prat to Seattle 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 Barcelona-El Prat to Seattle/Tacoma Intl are usually found in January or September, booked 76 days in advance, depart on a Wednesday or Monday and return on a Friday
Cheap flight deals from Barcelona-El Prat to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Barcelona-El Prat to SeattleExplore 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 July 19, 2026.
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 July 19, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/14. 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.
Fri 8/288:00 am
BCN
- SEA
1 stop17h 00m
Condor
Thu 9/106:05 pm
SEA
- BCN
1 stop19h 05m
Condor
Deal found 7/14![Condor logo]()
$596
This Cheapflightsfares deal was found by Cheapflights users on 7/15. 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.
Thu 10/158:00 am
BCN
- SEA
1 stop17h 00m
Condor
Thu 4/295:45 pm
SEA
- BCN
1 stop13h 15m
Condor
Deal found 7/15![Condor logo]()
$607
This Cheapflightsfares deal was found by Cheapflights users on 7/16. 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.
Wed 9/168:00 am
BCN
- SEA
1 stop16h 40m
Condor
Wed 10/75:40 pm
SEA
- BCN
1 stop19h 30m
Condor
Deal found 7/16![Condor logo]()
$630
This Gotogate deal was found by Cheapflights users on 7/15. 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 9/48:00 am
BCN
- SEA
1 stop17h 00m
Condor
Thu 9/176:05 pm
SEA
- BCN
1 stop19h 05m
Condor
Deal found 7/15![Condor logo]()
$645
This Cheapflightsfares deal was found by Cheapflights users on 7/17. 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.
Tue 9/110:25 am
BCN
- SEA
1 stop14h 15m
Condor
Tue 9/86:05 pm
SEA
- BCN
1 stop19h 05m
Condor
Deal found 7/17![Condor logo]()
$650
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/288:00 am
BCN
- SEA
1 stop17h 00m
Condor
Sun 8/305:40 pm
SEA
- BCN
1 stop13h 20m
Condor
Deal found 7/16![Condor logo]()
$657
This Cheapflightsfares deal was found by Cheapflights users on 7/15. 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 10/1110:25 am
BCN
- SEA
1 stop14h 15m
Condor
Thu 4/295:45 pm
SEA
- BCN
1 stop19h 10m
Condor
Deal found 7/15![Condor logo]()
$661
Best flights from Barcelona-El Prat to SeattleDiscover carefully curated flight deals from Barcelona-El Prat to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 19, 2026.
Discover carefully curated flight deals from Barcelona-El Prat to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 19, 2026.
This Condor deal was found by Cheapflights users on 7/14. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:00 am
BCN
- SEA
1 stop17h 00m
Multiple Airlines
Thu 9/101:30 pm
SEA
- BCN
2 stops23h 40m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$696
This Scandinavian Airlines deal was found by Cheapflights users on 7/18. 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.
Thu 9/107:00 pm
BCN
- SEA
1 stop27h 45m
Scandinavian Airlines
Sun 9/133:55 pm
SEA
- BCN
1 stop17h 15m
Scandinavian Airlines
Deal found 7/18![Scandinavian Airlines logo]()
$845
This Delta deal was found by Cheapflights users on 7/19. 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.
Sat 9/199:20 am
BCN
- SEA
1 stop16h 15m
Delta
Sat 10/33:30 pm
SEA
- BCN
Nonstop10h 40m
Delta
Deal found 7/19![Delta logo]()
$883
This United Airlines deal was found by Cheapflights users on 7/15. 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 9/96:40 am
BCN
- SEA
2 stops16h 42m
United Airlines
Fri 9/258:10 am
SEA
- BCN
1 stop15h 10m
United Airlines
Deal found 7/15![United Airlines logo]()
$912
This Condor deal was found by Cheapflights users on 7/14. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:00 am
BCN
- SEA
1 stop17h 00m
Multiple Airlines
Thu 9/312:12 pm
SEA
- BCN
2 stops24h 58m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$799
This Delta deal was found by Cheapflights users on 7/16. 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.
Fri 8/286:20 am
BCN
- SEA
1 stop14h 17m
Delta
Thu 9/103:35 pm
SEA
- BCN
Nonstop10h 35m
Delta
Deal found 7/16![Delta logo]()
$883
This Condor deal was found by Cheapflights users on 7/18. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:00 am
BCN
- SEA
1 stop16h 40m
Multiple Airlines
Tue 9/2212:05 pm
SEA
- BCN
2 stops25h 05m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$824
This Delta deal was found by Cheapflights users on 7/14. 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 9/911:10 am
BCN
- SEA
1 stop14h 25m
Delta
Fri 9/2511:59 am
SEA
- BCN
2 stops18h 36m
Delta
Deal found 7/14![Delta logo]()
$911
This Condor deal was found by Cheapflights users on 7/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:00 am
BCN
- SEA
2 stops21h 39m
Multiple Airlines
Tue 9/226:49 am
SEA
- BCN
2 stops30h 21m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$848
This Condor deal was found by Cheapflights users on 7/15. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:00 am
BCN
- SEA
2 stops22h 57m
Multiple Airlines
Thu 4/295:45 pm
SEA
- BCN
1 stop13h 15m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$850
This Condor deal was found by Cheapflights users on 7/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/108:00 am
BCN
- SEA
1 stop17h 10m
Multiple Airlines
Sun 8/168:53 am
SEA
- BCN
2 stops28h 17m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$870
This Condor deal was found by Cheapflights users on 7/18. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:25 am
BCN
- SEA
1 stop14h 15m
Multiple Airlines
Sun 8/3010:40 am
SEA
- BCN
2 stops26h 30m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$881
Last-minute flights from Barcelona-El Prat to SeattleDiscover last-minute flight deals from Barcelona-El Prat to Seattle. Data last updated July 19, 2026 and is based on user searches.
Discover last-minute flight deals from Barcelona-El Prat to Seattle. Data last updated July 19, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Wed 8/198:00 am
BCN
- SEA
1 stop16h 40m
Condor
Sat 8/296:15 pm
SEA
- BCN
1 stop18h 55m
Condor
Deal found 7/17![Condor logo]()
$678
This lol.travel deal was found by Cheapflights users on 7/18. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:00 am
BCN
- SEA
1 stop16h 40m
Condor
Sun 8/305:40 pm
SEA
- BCN
1 stop13h 20m
Condor
Deal found 7/18![Condor logo]()
$681
This Cheapflightsfares deal was found by Cheapflights users on 7/14. 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.
Fri 8/288:00 am
BCN
- SEA
1 stop17h 00m
Condor
Thu 9/106:05 pm
SEA
- BCN
1 stop19h 05m
Condor
Deal found 7/14![Condor logo]()
$596
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/288:00 am
BCN
- SEA
1 stop17h 00m
Condor
Sun 8/305:40 pm
SEA
- BCN
1 stop13h 20m
Condor
Deal found 7/16![Condor logo]()
$657
One-way flights from Barcelona-El Prat to SeattleSearch for one-way flight options from Barcelona-El Prat to Seattle. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
Search for one-way flight options from Barcelona-El Prat to Seattle. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 9/1811:25 am
BCN
- SEA
3 stops55h 26m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$597
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 9/1410:40 pm
BCN
- SEA
3 stops58h 47m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$598
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Wed 9/163:00 pm
BCN
- SEA
3 stops42h 27m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$600
This Priceline deal was found by Cheapflights users on 7/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:00 pm
BCN
- SEA
1 stop27h 40m
WestJet
Deal found 7/14![WestJet logo]()
$602
This Cheapflightsfares deal was found by Cheapflights users on 7/16. 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.
Mon 9/1410:45 am
BCN
- SEA
1 stop38h 57m
British Airways
Deal found 7/16![British Airways logo]()
$603
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 12/314:30 pm
BCN
- SEA
2 stops33h 30m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$605
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 10/316:45 am
BCN
- SEA
2 stops21h 11m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$606
This FlightHub deal was found by Cheapflights users on 7/16. 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 9/123:00 pm
BCN
- SEA
2 stops25h 35m
WestJet
Deal found 7/16![WestJet logo]()
$607
This British Airways deal was found by Cheapflights users on 7/15. 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.
Sat 10/107:40 am
BCN
- SEA
1 stop19h 45m
British Airways
Deal found 7/15![British Airways logo]()
$611
This Kiwi.com deal was found by Cheapflights users on 7/16. 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.
Sun 8/235:35 am
BCN
- SEA
3 stops39h 45m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$612
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 9/1210:40 pm
BCN
- SEA
3 stops58h 47m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$615
Find 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 July 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $596 (Cheapflightsfares) |
Popular in | July |
Cheapest in | January |
Average price | $1,013 |
Good round-trip deal | $1,011 or less |
Good one-way deal | $560 or less |
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 July 19, 2026.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Fri 8/28
8:00 am-4:00 pm
1 stop17h 00m
Seattle/Tacoma Intl
Thu 9/10
1:30 pm-10:10 pm
2 stops23h 40m
$696
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Sat 8/22
8:00 am-4:00 pm
1 stop17h 00m
Seattle/Tacoma Intl
Thu 9/3
12:12 pm-10:10 pm
2 stops24h 58m
$799
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Sun 9/6
8:00 am-3:40 pm
1 stop16h 40m
Seattle/Tacoma Intl
Tue 9/22
12:05 pm-10:10 pm
2 stops25h 05m
$824
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Thu 9/10
7:00 pm-1:45 pm
1 stop27h 45m
Seattle/Tacoma Intl
Sun 9/13
3:55 pm-6:10 pm
1 stop17h 15m
$845
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Fri 9/11
8:00 am-8:39 pm
2 stops21h 39m
Seattle/Tacoma Intl
Tue 9/22
6:49 am-10:10 pm
2 stops30h 21m
$848
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Sun 10/11
8:00 am-9:57 pm
2 stops22h 57m
Seattle/Tacoma Intl
Thu 4/29
5:45 pm-4:00 pm
1 stop13h 15m
$850
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Mon 8/10
8:00 am-4:10 pm
1 stop17h 10m
Seattle/Tacoma Intl
Sun 8/16
8:53 am-10:10 pm
2 stops28h 17m
$870
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Wed 8/19
10:25 am-3:40 pm
1 stop14h 15m
Seattle/Tacoma Intl
Sun 8/30
10:40 am-10:10 pm
2 stops26h 30m
$881
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Sat 9/19
9:20 am-4:35 pm
1 stop16h 15m
Seattle/Tacoma Intl
Sat 10/3
3:30 pm-11:10 am
Nonstop10h 40m
$883
Quickest round-trip
BarcelonaSeattle
BCN - SEA
BCNSEA
Barcelona-El Prat
Fri 8/28
6:20 am-11:37 am
1 stop14h 17m
Seattle/Tacoma Intl
Thu 9/10
3:35 pm-11:10 am
Nonstop10h 35m
$883
Showing 1-10 of 20 resultsSorted by cheapest first
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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Barcelona-El Prat Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Barcelona-El Prat Airport-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
BCN-SEA
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
Prices
More
How far ahead should I book a flight from Barcelona-El Prat Airport to Seattle?
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 75 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, January is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Seattle (average of $803). Flying from Barcelona-El Prat Airport to Seattle in July is currently the most expensive (average of $1,013). 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 July 19, 2026.
When flying from Barcelona-El Prat Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
What’s the top layover airport for flights from Barcelona-El Prat Airport to Seattle?
Share of 1-stop round-trip flights from Barcelona-El Prat Airport to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Frankfurt am Main (FRA) – chosen by Cheapflights users on 80% of 1-stop itineraries from Barcelona-El Prat Airport to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Barcelona-El Prat Airport to Seattle?
Average round-trip fare for 1-stop flights from Barcelona-El Prat Airport to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Frankfurt am Main (FRA) is the most affordable 1-stop option, with an average round-trip price of $837.
What’s the fastest layover option from Barcelona-El Prat Airport to Seattle?
Shortest average travel time for 1-stop one-way flights from Barcelona-El Prat Airport to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Amsterdam (AMS) have the shortest average one-way travel time for 1-stop routes: 14h 35m.
Which airport typically offers the quickest layover for flights from Barcelona-El Prat Airport to Seattle?
Average layover duration for 1-stop one-way flights from Barcelona-El Prat Airport to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Frankfurt am Main (FRA) offer the fastest connection on this route, with an average layover time of 1h 45m.
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 July 19, 2026.
See what other customers who have flown with Delta,Lufthansa, andBritish Airways 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.
Food
7.2
Overall
7.8
Entertainment
7.8
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Food
7.2
Overall
7.8
Entertainment
7.8
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Food
7.2
Overall
7.8
Entertainment
7.8
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Food
7.2
Overall
7.8
Entertainment
7.8
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Food
7.2
Overall
7.8
Entertainment
7.8
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Related info for your journey
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Barcelona-El Prat and Seattle flights
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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 July 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$600 | Average$710 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$662 | Average$836 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$777 | Average$837 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$814 | Average$844 | FlexibilityNo cancel fee | On-timeN/A |