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Cheap flights from Seattle to Barcelona-El Prat Airport from C$ 355

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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
5 Feb — 12 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 6 January 2026.

Round-trip from

C$ 570

One-way from

C$ 355

Popular in

June

Cheapest in

January

Average price

C$ 699
Icelandair
  • Icelandair
  • 30/1-3/2
  • 2 total stops
  • 28h 10m total
  • Seattle to Barcelona
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18/2
  • 18/2
  • 2 total stops
  • 24h 24m total
  • Seattle to Barcelona
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (C$ 549 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 78 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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Find 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 6 January 2026.

Fri 30/12:35 p.m.SEA - BCN
1 stop14h 00mIcelandair
Tue 3/211:50 a.m.BCN - SEA
1 stop14h 10mIcelandair
Deal found 4/1C$ 570
Sun 15/23:10 p.m.SEA - BCN
1 stop14h 35mLufthansa
Mon 23/210:30 a.m.BCN - SEA
1 stop19h 26mLufthansa
Deal found 6/1C$ 610
Fri 30/12:35 p.m.SEA - BCN
1 stop14h 00mIcelandair
Sun 1/211:50 a.m.BCN - SEA
1 stop14h 10mIcelandair
Deal found 4/1C$ 622
Tue 3/27:00 a.m.SEA - BCN
1 stop17h 00mUnited Airlines
Tue 10/21:35 p.m.BCN - SEA
3 stops40h 37mUnited Airlines
Deal found 6/1C$ 640
Sat 14/211:35 p.m.SEA - BCN
2 stops25h 00mUnited Airlines
Tue 24/21:35 p.m.BCN - SEA
2 stops38h 28mUnited Airlines
Deal found 6/1C$ 646
Sat 28/211:59 p.m.SEA - BCN
2 stops23h 21mUnited Airlines
Mon 9/312:35 p.m.BCN - SEA
2 stops42h 10mUnited Airlines
Deal found 5/1C$ 647
Mon 9/27:00 a.m.SEA - BCN
2 stops17h 00mUnited Airlines
Thu 26/26:50 a.m.BCN - SEA
1 stop14h 20mUnited Airlines
Deal found 6/1C$ 651
Mon 9/210:59 p.m.SEA - BCN
1 stop24h 41mDelta
Wed 25/210:15 a.m.BCN - SEA
1 stop21h 07mDelta
Deal found 6/1C$ 654
Tue 10/23:40 p.m.SEA - BCN
2 stops32h 55mAir Canada
Thu 26/21:35 p.m.BCN - SEA
2 stops33h 56mAir Canada
Deal found 6/1C$ 655
Mon 9/27:10 a.m.SEA - BCN
2 stops19h 00mDelta
Sun 1/310:15 a.m.BCN - SEA
2 stops22h 54mDelta
Deal found 6/1C$ 659
Tue 17/21:40 p.m.SEA - BCN
1 stop16h 20mDelta
Tue 24/211:10 a.m.BCN - SEA
1 stop33h 30mDelta
Deal found 4/1C$ 662
Wed 11/23:10 p.m.SEA - BCN
1 stop17h 25mUnited Airlines
Fri 27/211:00 a.m.BCN - SEA
2 stops20h 59mUnited Airlines
Deal found 6/1C$ 664

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 6 January 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

Sun 1/3

11:59 p.m.-9:35 a.m.

2 stops24h 36m

Barcelona-El Prat

Tue 10/3

12:35 p.m.-11:49 a.m.

2 stops31h 14m

C$ 646

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/2

2:10 p.m.-9:35 a.m.

2 stops34h 25m

Barcelona-El Prat

Mon 16/2

1:35 p.m.-7:03 p.m.

2 stops38h 28m

C$ 646

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/2

6:15 a.m.-8:40 a.m.

1 stop17h 25m

Barcelona-El Prat

Tue 24/2

10:15 a.m.-12:09 a.m.

2 stops22h 54m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 9/2

4:05 p.m.-8:40 a.m.

1 stop31h 35m

Barcelona-El Prat

Sat 28/2

10:15 a.m.-10:22 p.m.

2 stops21h 07m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/2

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

1 stop17h 00m

Barcelona-El Prat

Thu 26/2

11:00 a.m.-10:59 p.m.

2 stops20h 59m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/2

6:15 a.m.-8:40 a.m.

1 stop17h 25m

Barcelona-El Prat

Sun 1/3

10:15 a.m.-12:09 a.m.

2 stops22h 54m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 9/2

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

2 stops17h 00m

Barcelona-El Prat

Wed 25/2

10:30 a.m.-8:56 p.m.

1 stop19h 26m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/2

6:15 a.m.-8:40 a.m.

1 stop17h 25m

Barcelona-El Prat

Sat 28/2

10:15 a.m.-8:00 p.m.

1 stop18h 45m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/2

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

1 stop17h 00m

Barcelona-El Prat

Wed 25/2

11:00 a.m.-10:59 p.m.

2 stops20h 59m

C$ 654

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 9/2

7:10 a.m.-8:00 a.m.

1 stop15h 50m

Barcelona-El Prat

Sun 1/3

10:15 a.m.-8:00 p.m.

1 stop18h 45m

C$ 654

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/1

Showing 1-10 of 18 results
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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 2 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$ 486). Flying from Seattle to Barcelona-El Prat Airport in June is currently the most expensive (average of C$ 1,188). 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-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 6 January 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
7,683 reviews
Check prices

Crew

7.6

Entertainment

6.4

Comfort

6.8

Boarding

7.0

Food

6.3

Overall

6.8

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
7,683 reviews
Lufthansa
6.8
Okay
7,683 reviews
Check prices

Crew

7.6

Entertainment

6.4

Comfort

6.8

Boarding

7.0

Food

6.3

Overall

6.8

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 17h 25m. United Airlines provides one of the quickest options available for as low as C$ 654. The distance from Seattle to Barcelona-El Prat Airport is about 8724 km. This flight may include one or multiple stops.

  • 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$ 654 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$ 486). Flying from Seattle to Barcelona-El Prat Airport in June is currently the most expensive (average of C$ 1,188). 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

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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 6 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 654AverageC$ 766FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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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