$305+ Cheap flights from Seattle (SEA) to Barcelona
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 11/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
Dec 4 — Dec 111
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Barcelona 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 are usually found in January or February, booked 74 days in advance, depart on a Friday or Monday and return on a Monday
Cheap flight deals from Seattle to Barcelona
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to BarcelonaExplore 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 November 4, 2026.
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 November 4, 2026.
This Mytrip deal was found by Cheapflights users on 11/3. 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 12/22:35 pm -
2 stops24h 05m
Wed 12/97:10 am -
2 stops18h 50m
Deal found 11/3![Multiple Airlines logo]()
$703
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Tue 12/88:40 am -
3 stops24h 40m
Tue 12/1512:30 pm -
2 stops33h 30m
Deal found 11/3![Multiple Airlines logo]()
$749
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Sat 11/281:50 pm -
2 stops34h 05m
Sun 12/138:35 pm -
3 stops34h 22m
Deal found 11/3![Multiple Airlines logo]()
$781
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 11/252:35 pm -
1 stop14h 05m
Thu 12/32:45 pm -
1 stop35h 15m
Deal found 11/2![Icelandair logo]()
$807
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/172:35 pm -
2 stops18h 20m
Tue 11/247:30 am -
2 stops18h 30m
Deal found 10/30![Multiple Airlines logo]()
$817
This Mytrip deal was found by Cheapflights users on 11/3. 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 11/232:35 pm -
3 stops33h 20m
Wed 12/98:30 pm -
3 stops29h 30m
Deal found 11/3![Multiple Airlines logo]()
$821
Best flights from Seattle to BarcelonaDiscover carefully curated flight deals from Seattle to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
Discover carefully curated flight deals from Seattle to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
This Turkish Airlines deal was found by Cheapflights users on 11/3. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:05 pm -
1 stop30h 50m
Wed 12/96:20 pm -
1 stop31h 50m
Deal found 11/3![Turkish Airlines logo]()
$911
This KLM deal was found by Cheapflights users on 10/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/113:25 pm -
1 stop16h 35m
Fri 4/3012:50 pm -
Nonstop11h 24m
Deal found 10/31![Multiple Airlines logo]()
$958
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/217:19 pm -
2 stops28h 01m
Tue 3/91:15 pm -
2 stops32h 49m
Deal found 10/30![United Airlines logo]()
$968
This Scandinavian Airlines deal was found by Cheapflights users on 11/3. 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.
Sun 11/227:27 am -
2 stops25h 53m
Mon 11/307:10 pm -
2 stops37h 14m
Deal found 11/3![Scandinavian Airlines logo]()
$1,155
This Turkish Airlines deal was found by Cheapflights users on 10/31. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/118:05 pm -
1 stop32h 25m
Wed 3/175:55 am -
1 stop20h 15m
Deal found 10/31![Turkish Airlines logo]()
$911
This Turkish Airlines 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/17:05 pm -
1 stop19h 45m
Fri 2/56:20 pm -
1 stop31h 50m
Deal found 10/30![Turkish Airlines logo]()
$1,130
This Turkish Airlines deal was found by Cheapflights users on 11/1. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/317:05 pm -
1 stop30h 50m
Tue 1/512:20 pm -
1 stop37h 50m
Deal found 11/1![Turkish Airlines logo]()
$1,151
This United Airlines deal was found by Cheapflights users on 10/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2010:50 pm -
1 stop25h 10m
Tue 12/2910:30 am -
2 stops36h 05m
Deal found 10/31![United Airlines logo]()
$1,399
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/237:00 am -
2 stops41h 00m
Mon 12/286:50 am -
1 stop14h 10m
Deal found 11/2![United Airlines logo]()
$1,408
This United Airlines deal was found by Cheapflights users on 10/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2011:44 pm -
2 stops23h 36m
Wed 12/3010:30 am -
2 stops41h 36m
Deal found 10/31![United Airlines logo]()
$1,415
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/201:02 pm -
3 stops34h 18m
Thu 12/311:15 pm -
2 stops60h 04m
Deal found 10/30![United Airlines logo]()
$1,557
This Turkish Airlines deal was found by Cheapflights users on 11/3. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:05 pm -
1 stop37h 10m
Sun 11/292:35 pm -
1 stop35h 35m
Deal found 11/3![Turkish Airlines logo]()
$1,586
Last-minute flights from Seattle to BarcelonaDiscover last-minute flight deals from Seattle to Barcelona. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Barcelona. Data last updated November 4, 2026 and is based on user searches.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/172:35 pm -
2 stops18h 20m
Tue 11/247:30 am -
2 stops18h 30m
Deal found 10/30![Multiple Airlines logo]()
$817
This Mytrip deal was found by Cheapflights users on 11/3. 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 11/232:35 pm -
3 stops33h 20m
Wed 12/98:30 pm -
3 stops29h 30m
Deal found 11/3![Multiple Airlines logo]()
$821
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 11/252:35 pm -
1 stop14h 05m
Thu 12/32:45 pm -
1 stop35h 15m
Deal found 11/2![Icelandair logo]()
$807
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Sat 11/281:50 pm -
2 stops34h 05m
Sun 12/138:35 pm -
3 stops34h 22m
Deal found 11/3![Multiple Airlines logo]()
$781
This Mytrip deal was found by Cheapflights users on 11/3. 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 12/22:35 pm -
2 stops24h 05m
Wed 12/97:10 am -
2 stops18h 50m
Deal found 11/3![Multiple Airlines logo]()
$703
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Tue 12/88:40 am -
3 stops24h 40m
Tue 12/1512:30 pm -
2 stops33h 30m
Deal found 11/3![Multiple Airlines logo]()
$749
One-way flights from Seattle to BarcelonaSearch for one-way flight options from Seattle to Barcelona. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
Search for one-way flight options from Seattle to Barcelona. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/292:35 pm -
2 stops20h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/32:35 pm -
2 stops18h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Tue 12/12:35 pm -
3 stops24h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$309
This Mytrip deal was found by Cheapflights users on 10/31. 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 1/272:35 pm -
2 stops24h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$310
This Mytrip deal was found by Cheapflights users on 10/31. 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.
Tue 1/262:35 pm -
2 stops24h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 11/152:35 pm -
3 stops45h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Multiple Airlines logo]()
$312
This Mytrip deal was found by Cheapflights users on 10/31. 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.
Mon 1/252:35 pm -
2 stops24h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/12:35 pm -
2 stops18h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/22:35 pm -
3 stops23h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$328
Find 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 November 4, 2026.
Round-trip from | $703 (Mytrip) |
|---|---|
One-way from | $305 (Mytrip) |
Popular in | December |
Cheapest in | January |
Average price | $956 |
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 7,457,451 searches. Data last updated November 4, 2026.
Use the filters below to find and compare flights from Seattle to Barcelona that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Sun 11/29
2:35 pm-7:50 pm
2 stops20h 15m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$305
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Wed 1/27
2:35 pm-11:40 pm
2 stops24h 05m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$310
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Tue 11/17
2:35 pm-7:10 pm
3 stops43h 35m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$341
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Mon 11/16
2:35 pm-12:10 am
3 stops24h 35m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$353
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Fri 11/27
2:35 pm-11:30 am
3 stops35h 55m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$358
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Thu 2/11
2:35 pm-11:05 pm
2 stops23h 30m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$373
Quickest round-trip
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Mon 3/1
2:35 pm-6:20 pm
3 stops18h 45m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Thu 11/26
2:35 pm-12:45 am
3 stops25h 10m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$388
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Sat 11/14
4:27 pm-11:45 pm
3 stops46h 18m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$407
SeattleBarcelona
SEA Seattle/Tacoma Intl - BCN Barcelona-El Prat
SEABCN
Seattle/Tacoma Intl
Sat 1/2
2:20 pm-10:10 am
2 stops34h 50m
Barcelona-El Prat
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$437
Showing 1-10 of 22 resultsSorted by cheapest first
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.
SEA-S37
SEA-BCN
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
SEA-S37
SEA-BCN
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 $480). Flying from Seattle to Barcelona in December is currently the most expensive (average of $1,206). 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.
How much does it cost to fly round-trip from Seattle to Barcelona?
Airfare is below average for this route at the moment.
Seattle to Barcelona flights typically cost between $795 and $1,247 in December.The cheapest round-trip price found within the last 5 days was $703 on Multiple Airlines (Dec 2-Dec 9).
How often are flights from Seattle to Barcelona delayed?
About 8% of weekly flights between Seattle and Barcelona have experienced delays in the past year, with the average delay time being 192 minutes.
What is the most punctual flight time for Seattle to Barcelona flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Seattle to Barcelona flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 8% of flights being delayed.
How far ahead should I book a flight from Seattle to Barcelona?
To ensure you get the cheapest price possible for a flight from Seattle to Barcelona, you should look to book at least 71 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.
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 November 4, 2026.
Read through reviews of airlines operating flights from Seattle to Barcelona, such as Delta,Turkish Airlines, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
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.
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Complete your trip
Complete your trip to Barcelona by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Barcelona by cabin class
Find flights from Seattle to Barcelona, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Barcelona flights
Browse other Seattle and Barcelona flight options. Last updated on November 4, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on November 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$369 | Average$480 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$473 | Average$1,051 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$476 | Average$909 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$478 | Average$599 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$485 | Average$1,026 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$486 | Average$1,125 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$512 | Average$734 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$584 | Average$753 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$586 | Average$837 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$772 | FlexibilityNo cancel fee | On-time77% |