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Cheap flights from Seattle to Barcelona-El Prat Airport from C$ 545

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
6 Mar — 13 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Barcelona-El Prat

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Barcelona-El Prat
Explore the most affordable flight options available from Seattle to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 February 2026.

Tue 3/38:17 a.m.
SEA
-
BCN
1 stop15h 03m
United Airlines
Tue 10/312:35 p.m.
BCN
-
SEA
2 stops38h 28m
United Airlines
Deal found 2/2C$ 638
Wed 8/45:00 a.m.
SEA
-
BCN
2 stops18h 00m
United Airlines
Tue 14/412:15 p.m.
BCN
-
SEA
2 stops37h 26m
United Airlines
Deal found 4/2C$ 642
Sat 18/411:35 p.m.
SEA
-
BCN
2 stops23h 45m
United Airlines
Tue 28/412:15 p.m.
BCN
-
SEA
2 stops32h 33m
United Airlines
Deal found 3/2C$ 643
Sun 19/47:00 a.m.
SEA
-
BCN
1 stop21h 15m
United Airlines
Tue 28/41:15 p.m.
BCN
-
SEA
2 stops36h 26m
United Airlines
Deal found 2/2C$ 645
Sun 19/411:59 p.m.
SEA
-
BCN
1 stop28h 16m
United Airlines
Thu 30/41:15 p.m.
BCN
-
SEA
1 stop30h 05m
United Airlines
Deal found 2/2C$ 646
Wed 8/46:50 p.m.
SEA
-
BCN
1 stop18h 35m
United Airlines
Wed 22/41:15 p.m.
BCN
-
SEA
2 stops36h 22m
United Airlines
Deal found 3/2C$ 649
Wed 22/46:50 p.m.
SEA
-
BCN
1 stop18h 35m
United Airlines
Tue 28/41:15 p.m.
BCN
-
SEA
2 stops36h 26m
United Airlines
Deal found 2/2C$ 650
Sat 11/411:59 p.m.
SEA
-
BCN
1 stop28h 16m
United Airlines
Tue 21/41:15 p.m.
BCN
-
SEA
2 stops36h 22m
United Airlines
Deal found 2/2C$ 652
Sat 18/412:08 p.m.
SEA
-
BCN
2 stops40h 07m
United Airlines
Fri 1/51:15 p.m.
BCN
-
SEA
1 stop30h 05m
United Airlines
Deal found 2/2C$ 653
Mon 13/47:12 a.m.
SEA
-
BCN
2 stops22h 43m
United Airlines
Tue 21/41:15 p.m.
BCN
-
SEA
2 stops36h 22m
United Airlines
Deal found 2/2C$ 656
Mon 20/410:48 a.m.
SEA
-
BCN
1 stop17h 27m
United Airlines
Thu 30/46:40 a.m.
BCN
-
SEA
1 stop14h 40m
United Airlines
Deal found 2/2C$ 657
Tue 14/46:40 p.m.
SEA
-
BCN
1 stop13h 30m
Delta
Tue 21/46:20 a.m.
BCN
-
SEA
1 stop14h 25m
Delta
Deal found 2/2C$ 660

Find flight deals from Seattle to Barcelona-El Prat

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Barcelona-El Prat (BCN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 February 2026.

Round-trip from

C$ 638

One-way from

C$ 545

Popular in

June

Cheapest in

January

Average price

C$ 791
United Airlines
  • United Airlines
  • 3/3-10/3
  • 3 total stops
  • 53h 31m total
  • Seattle to Barcelona
Search Deals
United Airlines
  • United Airlines
  • 27/4
  • 1 total stop
  • 21h 15m total
  • Seattle to Barcelona
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (C$ 515 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 77 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Barcelona-El Prat that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 4 February 2026.
Use the filters below to find and compare flights from Seattle to Barcelona-El Prat Airport that are best for you.

Fly from

Seattle

Fly to

Barcelona-El Prat

Route

Depart

Return

Price

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 3/3

8:17 a.m.-8:20 a.m.

1 stop15h 03m

Barcelona-El Prat

Thu 12/3

6:50 a.m.-1:10 p.m.

1 stop14h 20m

C$ 657

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 20/4

7:00 a.m.-9:00 a.m.

2 stops17h 00m

Barcelona-El Prat

Wed 29/4

6:40 a.m.-12:20 p.m.

1 stop14h 40m

C$ 664

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 3/3

6:10 a.m.-8:00 a.m.

2 stops16h 50m

Barcelona-El Prat

Thu 12/3

9:30 a.m.-10:24 a.m.

2 stops32h 54m

C$ 671

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 3/3

7:29 p.m.-3:40 p.m.

1 stop35h 11m

Barcelona-El Prat

Sun 8/3

10:30 a.m.-7:58 p.m.

2 stops42h 28m

C$ 671

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 4/3

7:00 a.m.-8:20 a.m.

2 stops16h 20m

Barcelona-El Prat

Mon 9/3

11:00 a.m.-10:45 p.m.

2 stops19h 45m

C$ 672

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 14/4

7:00 a.m.-12:30 p.m.

2 stops20h 30m

Barcelona-El Prat

Mon 20/4

1:25 p.m.-11:45 a.m.

1 stop31h 20m

C$ 673

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 12/4

2:24 p.m.-1:15 p.m.

1 stop13h 51m

Barcelona-El Prat

Sun 19/4

12:15 p.m.-10:37 p.m.

2 stops43h 22m

C$ 706

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 9/4

8:00 a.m.-8:20 a.m.

1 stop15h 20m

Barcelona-El Prat

Tue 21/4

6:40 a.m.-12:20 p.m.

1 stop14h 40m

C$ 725

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 19/4

7:20 a.m.-8:45 a.m.

1 stop16h 25m

Barcelona-El Prat

Sat 2/5

6:20 a.m.-11:42 a.m.

1 stop14h 22m

C$ 728

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 3/3

8:17 a.m.-8:20 a.m.

1 stop15h 03m

C$ 545

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 19 results
1
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Best time to book a flight from Seattle to Barcelona-El Prat

Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Barcelona-El Prat Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Barcelona-El Prat. Price data was last updated on 30 January 2026.

The price you pay for your flight from Seattle to Barcelona-El Prat Airport may vary depending on when you book. For the best chance of a lower fare, look to book 47 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona-El Prat Airport (average of C$ 482). Flying from Seattle to Barcelona-El Prat Airport in June is currently the most expensive (average of C$ 1,176). 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-El Prat Airport?

Reviews of airlines servicing Barcelona-El Prat

Get insights into the airlines that provide service to Barcelona-El Prat. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Barcelona-El Prat. Reviews last updated 4 February 2026.
Read reviews from past customers who have flown Lufthansa from Seattle to Barcelona-El Prat Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
7,759 reviews
Check prices

Overall

6.8

Crew

7.6

Comfort

6.8

Entertainment

6.4

Boarding

7.0

Food

6.3

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

SFO - MUC

The coordination between United and Lufthansa teams is poor and confusing.
Lufthansa
6.8
Okay
7,759 reviews
Lufthansa
6.8
Okay
7,759 reviews
Check prices

Overall

6.8

Crew

7.6

Comfort

6.8

Entertainment

6.4

Boarding

7.0

Food

6.3

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

SFO - MUC

The coordination between United and Lufthansa teams is poor and confusing.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Barcelona-El Prat. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Barcelona-El Prat?

    Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Barcelona-El Prat from Seattle. Booking flights from Seattle/Tacoma Intl (SEA) to Barcelona-El Prat should be relatively easy as there are 0 daily outbound flights to Barcelona-El Prat from 1 airline.

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

    A quick flight from Seattle to Barcelona-El Prat Airport can take about 18h. United Airlines provides one of the quickest options available for as low as C$ 642. The distance from Seattle to Barcelona-El Prat Airport is about 8724 km.

  • What is the cheapest airline to fly from Seattle to Barcelona-El Prat Airport round-trip?

    Our cheapest airline available from Seattle to Barcelona-El Prat Airport is Lufthansa. Our recent data shows that you can find tickets from as low as C$ 649 on this airline. You may be able to fly from Seattle to Barcelona-El Prat Airport for 40% less than the average price by searching for this airline.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Barcelona-El Prat by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona-El Prat Airport (average of C$ 482). Flying from Seattle to Barcelona-El Prat Airport in June is currently the most expensive (average of C$ 1,176). 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

Travelling to a place near Barcelona-El Prat Airport?

Book flights to Barcelona-El Prat Airport if you plan to visit one of these locations
Santa Susanna
L'Hospitalet de Llobregat

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Seattle to Barcelona-El Prat

Discover the top airline that operate flights from Seattle to Barcelona-El Prat. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 4 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 649AverageC$ 760FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Barcelona-El Prat?

Deals for Seattle to Barcelona-El Prat flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Barcelona-El Prat?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Barcelona-El Prat for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Barcelona-El Prat with no change fees?

Yes, we can. To see specific flights from Seattle to Barcelona-El Prat with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Barcelona-El Prat become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Barcelona-El Prat flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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