$262+ Cheap flights from Seattle (SEA) to Barcelona
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
Mar 13 — Mar 201
1 adult, Economy
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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
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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 February 11, 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 February 11, 2026.
This oojo deal was found by Cheapflights users on 2/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Wed 5/133:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/9![Icelandair logo]()
$404
This oojo deal was found by Cheapflights users on 2/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:00 pm
SEA
- BCN
1 stop34h 45m
Icelandair
Sat 5/93:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/9![Icelandair logo]()
$406
This FlightHub deal was found by Cheapflights users on 2/8. 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 5/77:00 pm
SEA
- BCN
1 stop34h 45m
Icelandair
Fri 5/153:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/8![Icelandair logo]()
$410
This Icelandair deal was found by Cheapflights users on 2/10. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Wed 4/293:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/10![Icelandair logo]()
$415
This KAYAK deal was found by Cheapflights users on 2/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Mon 5/43:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/9![Icelandair logo]()
$422
This KAYAK deal was found by Cheapflights users on 2/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Sat 5/93:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/9![Icelandair logo]()
$423
This KAYAK deal was found by Cheapflights users on 2/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:00 pm
SEA
- BCN
1 stop34h 45m
Icelandair
Mon 5/43:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/9![Icelandair logo]()
$424
This oojo deal was found by Cheapflights users on 2/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Mon 4/273:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/10![Icelandair logo]()
$426
This oojo deal was found by Cheapflights users on 2/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:00 pm
SEA
- BCN
1 stop34h 45m
Icelandair
Mon 4/273:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/10![Icelandair logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 5/53:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Fri 5/153:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/8![Icelandair logo]()
$429
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 5/97:00 pm
SEA
- BCN
1 stop34h 45m
Icelandair
Fri 5/153:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/8![Icelandair logo]()
$431
This Mytrip deal was found by Cheapflights users on 2/7. 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 8/26:55 pm
SEA
- REU
2 stops17h 50m
Multiple Airlines
Fri 8/1410:05 pm
REU
- SEA
3 stops28h 05m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$1,396
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 February 11, 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 February 11, 2026.
This Icelandair deal was found by Cheapflights users on 2/10. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:40 pm
SEA
- BCN
1 stop14h 05m
Icelandair
Mon 4/273:45 pm
BCN
- SEA
1 stop13h 55m
Icelandair
Deal found 2/10![Icelandair logo]()
$490
This Delta deal was found by Cheapflights users on 2/7. 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.
Thu 4/99:40 am
SEA
- BCN
2 stops20h 55m
Delta
Thu 4/301:25 pm
BCN
- SEA
1 stop31h 17m
Delta
Deal found 2/7![Delta logo]()
$536
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Fri 4/108:00 am
SEA
- BCN
1 stop16h 20m
United Airlines
Sun 4/1912:15 pm
BCN
- SEA
2 stops39h 45m
United Airlines
Deal found 2/10![United Airlines logo]()
$570
This Scandinavian Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:15 am
SEA
- BCN
2 stops25h 55m
Scandinavian Airlines
Sat 5/97:00 pm
BCN
- SEA
2 stops36h 37m
Scandinavian Airlines
Deal found 2/10![Scandinavian Airlines logo]()
$616
This Delta deal was found by Cheapflights users on 2/7. 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.
Thu 4/99:40 am
SEA
- BCN
2 stops20h 55m
Delta
Mon 4/2712:20 pm
BCN
- SEA
1 stop31h 55m
Delta
Deal found 2/7![Delta logo]()
$556
This United Airlines deal was found by Cheapflights users on 2/8. 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 4/58:00 am
SEA
- BCN
1 stop16h 20m
United Airlines
Tue 4/211:15 pm
BCN
- SEA
2 stops31h 33m
United Airlines
Deal found 2/8![United Airlines logo]()
$620
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 3/318:00 am
SEA
- BCN
1 stop16h 20m
United Airlines
Tue 4/211:15 pm
BCN
- SEA
2 stops36h 22m
United Airlines
Deal found 2/8![United Airlines logo]()
$620
This Delta deal was found by Cheapflights users on 2/8. 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 5/310:40 pm
SEA
- BCN
1 stop25h 05m
Delta
Wed 5/1312:55 pm
BCN
- SEA
Nonstop11h 25m
Delta
Deal found 2/8![Delta logo]()
$621
This Mytrip deal was found by Cheapflights users on 2/7. 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 8/26:55 pm
SEA
- REU
2 stops17h 50m
Multiple Airlines
Fri 8/1410:05 pm
REU
- SEA
3 stops28h 05m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$1,396
This Delta deal was found by Cheapflights users on 2/8. 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.
Mon 5/47:20 am
SEA
- BCN
1 stop16h 25m
Delta
Fri 5/1512:55 pm
BCN
- SEA
Nonstop11h 25m
Delta
Deal found 2/8![Delta logo]()
$621
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 5/511:39 am
SEA
- BCN
1 stop17h 41m
United Airlines
Thu 5/146:40 am
BCN
- SEA
2 stops24h 40m
United Airlines
Deal found 2/8![United Airlines logo]()
$626
Last-minute flights from Seattle to BarcelonaDiscover last-minute flight deals from Seattle to Barcelona. Data last updated February 11, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Barcelona. Data last updated February 11, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 2/9. 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 2/222:35 pm
SEA
- BCN
1 stop13h 40m
Icelandair
Tue 3/1011:50 am
BCN
- SEA
1 stop14h 10m
Icelandair
Deal found 2/9![Icelandair logo]()
$424
This Icelandair deal was found by Cheapflights users on 2/9. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/42:35 pm
SEA
- BCN
1 stop14h 00m
Icelandair
Sun 3/811:50 am
BCN
- SEA
1 stop14h 10m
Icelandair
Deal found 2/9![Icelandair logo]()
$453
This oojo deal was found by Cheapflights users on 2/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/62:35 pm
SEA
- BCN
1 stop14h 00m
Icelandair
Tue 3/1011:50 am
BCN
- SEA
1 stop14h 10m
Icelandair
Deal found 2/9![Icelandair logo]()
$426
This Gurufare deal was found by Cheapflights users on 2/8. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/811:30 pm
SEA
- BCN
1 stop24h 05m
Multiple Airlines
Sun 3/1512:15 pm
BCN
- SEA
1 stop33h 50m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$501
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/811:59 pm
SEA
- BCN
2 stops24h 21m
United Airlines
Sun 3/1512:35 pm
BCN
- SEA
2 stops42h 10m
United Airlines
Deal found 2/8![United Airlines logo]()
$571
This Air France deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:10 pm
SEA
- BCN
1 stop15h 50m
Multiple Airlines
Mon 3/167:55 pm
BCN
- SEA
1 stop24h 40m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$483
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 3/98:00 am
SEA
- BCN
1 stop16h 20m
United Airlines
Mon 3/1610:30 am
BCN
- SEA
2 stops33h 19m
United Airlines
Deal found 2/9![United Airlines logo]()
$491
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 3/103:00 pm
SEA
- BCN
1 stop18h 45m
Lufthansa
Tue 3/175:50 am
BCN
- SEA
1 stop15h 20m
Lufthansa
Deal found 2/8![Lufthansa logo]()
$454
This oojo deal was found by Cheapflights users on 2/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/101:37 pm
SEA
- BCN
2 stops20h 48m
British Airways
Tue 3/1710:05 am
BCN
- SEA
1 stop15h 50m
British Airways
Deal found 2/8![British Airways logo]()
$481
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 3/105:00 am
SEA
- BCN
2 stops24h 00m
United Airlines
Tue 3/1712:35 pm
BCN
- SEA
2 stops42h 10m
United Airlines
Deal found 2/8![United Airlines logo]()
$487
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 February 11, 2026.
Search for one-way flight options from Seattle to Barcelona. Find affordable one-way fares based on user searches. Data last updated February 11, 2026.
This Trip.com deal was found by Cheapflights users on 2/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/213:40 pm
SEA
- BCN
2 stops23h 45m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$262
This Trip.com deal was found by Cheapflights users on 2/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:00 pm
SEA
- BCN
2 stops17h 15m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$264
This Mytrip deal was found by Cheapflights users on 2/10. 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.
Thu 4/237:00 pm
SEA
- BCN
2 stops20h 50m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$266
This Trip.com deal was found by Cheapflights users on 2/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:00 pm
SEA
- BCN
2 stops17h 15m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$276
This Mytrip deal was found by Cheapflights users on 2/8. 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 3/22:35 pm
SEA
- BCN
2 stops23h 15m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 4/267:00 pm
SEA
- BCN
3 stops41h 40m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$279
This Trip.com deal was found by Cheapflights users on 2/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
- BCN
2 stops23h 05m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 3/83:35 pm
SEA
- BCN
2 stops23h 05m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$281
This Trip.com deal was found by Cheapflights users on 2/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/193:40 pm
SEA
- BCN
2 stops18h 40m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$282
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 February 11, 2026.
Round-trip from | $404 (oojo) |
|---|---|
One-way from | $262 (Trip.com) |
Popular in | June |
Cheapest in | February |
Average price | $486 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Barcelona that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 11, 2026.
Use the filters below to find and compare flights from Seattle to Barcelona that are best for you.
Fly from
Seattle
Fly to
Barcelona
Route
Depart
Return
Price
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Thu 4/23
3:40 pm-2:45 pm
1 stop14h 05m
Barcelona-El Prat
Mon 4/27
3:45 pm-8:40 pm
1 stop13h 55m
$490
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Thu 4/9
9:40 am-3:35 pm
2 stops20h 55m
Barcelona-El Prat
Thu 4/30
1:25 pm-11:42 am
1 stop31h 17m
$536
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Thu 4/9
9:40 am-3:35 pm
2 stops20h 55m
Barcelona-El Prat
Mon 4/27
12:20 pm-11:15 am
1 stop31h 55m
$556
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Fri 4/10
8:00 am-9:20 am
1 stop16h 20m
Barcelona-El Prat
Sun 4/19
12:15 pm-7:00 pm
2 stops39h 45m
$570
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Tue 5/5
7:15 am-6:10 pm
2 stops25h 55m
Barcelona-El Prat
Sat 5/9
7:00 pm-10:37 pm
2 stops36h 37m
$616
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Sun 4/5
8:00 am-9:20 am
1 stop16h 20m
Barcelona-El Prat
Tue 4/21
1:15 pm-11:48 am
2 stops31h 33m
$620
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Tue 3/31
8:00 am-9:20 am
1 stop16h 20m
Barcelona-El Prat
Tue 4/21
1:15 pm-4:37 pm
2 stops36h 22m
$620
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Sun 5/3
10:40 pm-8:45 am
1 stop25h 05m
Barcelona-El Prat
Wed 5/13
12:55 pm-3:20 pm
Nonstop11h 25m
$621
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Mon 5/4
7:20 am-8:45 am
1 stop16h 25m
Barcelona-El Prat
Fri 5/15
12:55 pm-3:20 pm
Nonstop11h 25m
$621
SeattleBarcelona
SEA - BCN
SEABCN
Seattle/Tacoma Intl
Tue 5/5
11:39 am-2:20 pm
1 stop17h 41m
Barcelona-El Prat
Thu 5/14
6:40 am-10:20 pm
2 stops24h 40m
$626
Showing 1-10 of 22 results
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
SEA-REU
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
SEA-REU
How far ahead should I book a flight from Seattle to Barcelona?
Use this chart to determine the optimal time to book a round-trip flight from Seattle to Barcelona. Price data was last updated on February 6, 2026.
To ensure you get the cheapest price possible for a flight from Seattle to Barcelona, you should look to book at least 47 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Seattle to Barcelona?
Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona (average of $353). Flying from Seattle to Barcelona in June is currently the most expensive (average of $804). 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.
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 February 11, 2026.
Read through reviews of airlines operating flights from Seattle to Barcelona, such as Delta, United Airlines, and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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.
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Alternative routes for Seattle to Barcelona
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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 February 11, 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 February 11, 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 2,558,603 searches. Data last updated February 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$367 | Average$535 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$461 | Average$534 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$476 | Average$715 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$477 | Average$667 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$482 | Average$791 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$486 | Average$977 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$493 | Average$850 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$494 | Average$771 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$502 | Average$791 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$567 | Average$774 | FlexibilityNo cancel fee | On-time76% |