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Cheap flights from Seattle to Barcelona from C$ 557

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 29/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 30 October 2025.

Round-trip from

C$ 644

One-way from

C$ 557

Popular in

June

Cheapest in

November

Average price

C$ 943
United Airlines
  • United Airlines
  • 14/2-24/2
  • 4 total stops
  • 63h 18m total
  • Seattle to Barcelona
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United Airlines
  • United Airlines
  • 29/1
  • 2 total stops
  • 17h 00m total
  • Seattle to Barcelona
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Highest demand for flights based on searches. 24% potential increase in price (C$ 547 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 74 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Seattle to Barcelona

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Barcelona
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 30 October 2025.

Thu 27/1110:53 a.m.SEA - BCN
1 stop17h 17mUnited Airlines
Thu 11/126:50 a.m.BCN - SEA
1 stop14h 20mUnited Airlines
Deal found 30/10C$ 658
Thu 4/128:10 a.m.SEA - BCN
1 stop15h 10mUnited Airlines
Tue 16/126:50 a.m.BCN - SEA
1 stop14h 20mUnited Airlines
Deal found 29/10C$ 665
Wed 3/123:10 p.m.SEA - BCN
1 stop17h 25mUnited Airlines
Tue 16/126:50 a.m.BCN - SEA
1 stop14h 20mUnited Airlines
Deal found 29/10C$ 667
Tue 2/121:40 p.m.SEA - BCN
1 stop16h 20mDelta
Wed 17/121:00 p.m.BCN - SEA
1 stop31h 50mDelta
Deal found 29/10C$ 669
Wed 3/127:20 a.m.SEA - BCN
1 stop15h 40mDelta
Sun 14/126:00 a.m.BCN - SEA
1 stop14h 50mDelta
Deal found 29/10C$ 670
Fri 5/127:00 a.m.SEA - BCN
2 stops16h 20mUnited Airlines
Tue 16/126:50 a.m.BCN - SEA
1 stop14h 20mUnited Airlines
Deal found 29/10C$ 672
Wed 3/127:20 a.m.SEA - BCN
2 stops21h 40mDelta
Wed 17/1211:10 a.m.BCN - SEA
1 stop33h 40mDelta
Deal found 29/10C$ 676
Thu 4/1211:15 p.m.SEA - BCN
2 stops23h 45mDelta
Thu 18/126:00 a.m.BCN - SEA
1 stop14h 50mDelta
Deal found 29/10C$ 677
Fri 5/127:00 a.m.SEA - BCN
2 stops16h 20mUnited Airlines
Wed 17/1210:30 a.m.BCN - SEA
2 stops30h 53mUnited Airlines
Deal found 29/10C$ 681
Fri 12/127:20 a.m.SEA - BCN
1 stop15h 40mDelta
Thu 25/126:00 a.m.BCN - SEA
2 stops19h 33mDelta
Deal found 29/10C$ 684
Sun 7/128:10 a.m.SEA - BCN
1 stop15h 10mUnited Airlines
Sun 21/129:55 a.m.BCN - SEA
1 stop35h 15mUnited Airlines
Deal found 30/10C$ 691
Fri 5/127:10 a.m.SEA - BCN
2 stops26h 10mScandinavian Airlines
Sun 14/127:10 p.m.BCN - SEA
2 stops32h 50mScandinavian Airlines
Deal found 29/10C$ 807

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 629,999 searches. Data last updated 30 October 2025.
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

Fri 5/12

8:10 a.m.-8:20 a.m.

1 stop15h 10m

Barcelona-El Prat

Tue 16/12

6:50 a.m.-12:10 p.m.

1 stop14h 20m

C$ 665

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 2/12

8:10 a.m.-8:20 a.m.

1 stop15h 10m

Barcelona-El Prat

Tue 16/12

6:50 a.m.-12:10 p.m.

1 stop14h 20m

C$ 665

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 2/12

1:40 p.m.-3:00 p.m.

1 stop16h 20m

Barcelona-El Prat

Sun 14/12

6:00 a.m.-11:50 a.m.

1 stop14h 50m

C$ 669

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 2/12

1:40 p.m.-3:00 p.m.

1 stop16h 20m

Barcelona-El Prat

Wed 17/12

1:00 p.m.-11:50 a.m.

1 stop31h 50m

C$ 669

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 6/12

1:40 p.m.-11:10 a.m.

1 stop12h 30m

Barcelona-El Prat

Mon 15/12

6:00 a.m.-11:50 a.m.

1 stop14h 50m

C$ 670

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 8/12

2:05 p.m.-3:00 p.m.

1 stop15h 55m

Barcelona-El Prat

Mon 15/12

1:00 p.m.-11:50 a.m.

1 stop31h 50m

C$ 670

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 8/12

7:20 a.m.-3:00 p.m.

2 stops22h 40m

Barcelona-El Prat

Sun 14/12

6:00 a.m.-11:50 a.m.

1 stop14h 50m

C$ 676

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 3/12

7:20 a.m.-2:00 p.m.

2 stops21h 40m

Barcelona-El Prat

Mon 15/12

1:00 p.m.-11:50 a.m.

1 stop31h 50m

C$ 676

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 1/1

5:02 a.m.-5:35 p.m.

2 stops27h 33m

Barcelona-El Prat

Sun 11/1

7:40 a.m.-1:20 p.m.

1 stop14h 40m

C$ 680

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 21/1

8:40 a.m.-2:05 p.m.

3 stops20h 25m

Barcelona-El Prat

Thu 5/2

1:35 p.m.-12:59 a.m.

2 stops20h 24m

C$ 688

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/10

Showing 1-10 of 22 results
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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.
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

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 24 October 2025.

The price you pay for your flight from Seattle to Barcelona may vary depending on when you book. For the best chance of a lower fare, look to book 4 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?

Currently, October is the cheapest month in which you can book a flight from Seattle to Barcelona (average of C$ 546). Flying from Seattle to Barcelona in June is currently the most expensive (average of C$ 1,232). 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 SEA to BCN?

Find hourly flight availability from Seattle to Barcelona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 October 2025.

One of the essential ways to save on airfare from Seattle to Barcelona is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 37% on airfare.

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 30 October 2025.
Check out reviews from past customers who have flown with Lufthansa from Seattle to Barcelona to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
7,541 reviews
Check prices

Overall

6.8

Boarding

7.0

Entertainment

6.4

Crew

7.6

Comfort

6.8

Food

6.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

SFO - FRA

Convenient flight to my destination. Good entertainment options on board. I was seated close to some people who had noisy children which made sleeping a bit challenging.
Lufthansa
6.8
Okay
7,541 reviews
Lufthansa
6.8
Okay
7,541 reviews
Check prices

Overall

6.8

Boarding

7.0

Entertainment

6.4

Crew

7.6

Comfort

6.8

Food

6.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

SFO - FRA

Convenient flight to my destination. Good entertainment options on board. I was seated close to some people who had noisy children which made sleeping a bit challenging.

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.

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

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Barcelona. 1 airline have flights from Seattle/Tacoma Intl to Barcelona on a regular basis. Booking flights from Seattle/Tacoma Intl to Barcelona should not be difficult; the airport handles an average of 0 outbound flights to Barcelona per day.

  • How long is the flight from Seattle to Barcelona?

    Departing from Seattle to Barcelona will take you 15h 10m. The distance between Seattle and Barcelona is about 8724 km. This flight may include one or multiple stops.

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

    Our cheapest airline available from Seattle to Barcelona is Lufthansa. Our recent data shows that you can find tickets from as low as C$ 721 on this airline. Users have found that Lufthansa is 39% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Barcelona 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?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Barcelona (average of C$ 546). Flying from Seattle to Barcelona in June is currently the most expensive (average of C$ 1,232). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Barcelona

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Barcelona-El Prat flights

Top airline flying from Seattle to Barcelona

Discover the top airline 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 629,999 searches. Data last updated 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 721AverageC$ 798FlexibilityNo 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?

Cheapflights makes it easy to find Seattle to Barcelona flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to Barcelona for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Barcelona from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Barcelona from Seattle today and book when prices fit your budget.

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