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Cheap flights from Seattle to Barcelona from C$ 660

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 19/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
17 Jun — 24 Jun1
1 adult

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 12 June 2025.

Round-trip from

C$ 901

One-way from

C$ 660

Popular in

June

Cheapest in

November

Average price

C$ 1,725
United Airlines
  • United Airlines
  • 1/10-5/10
  • 5 total stops
  • 73h 29m total
  • Seattle to Barcelona
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United Airlines
  • United Airlines
  • 19/9
  • 1 total stop
  • 15h 35m total
  • Seattle to Barcelona
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 533 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 66 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Seattle to Barcelona

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 12 June 2025.

Wed 1/101:00 p.m.SEA - BCN
3 stops33h 50mUnited Airlines
Sun 5/1012:10 p.m.BCN - SEA
2 stops39h 39mUnited Airlines
Deal found 10/6C$ 901
Sun 9/113:10 p.m.SEA - BCN
1 stop14h 35mLufthansa
Sat 15/116:20 p.m.BCN - SEA
1 stop28h 00mLufthansa
Deal found 10/6C$ 915
Sat 8/1111:35 p.m.SEA - BCN
1 stop24h 05mDelta
Sun 16/116:00 a.m.BCN - SEA
2 stops23h 50mDelta
Deal found 10/6C$ 920
Sat 8/117:00 a.m.SEA - BCN
2 stops41h 10mAustrian Airlines
Tue 18/118:30 p.m.BCN - SEA
2 stops31h 27mAustrian Airlines
Deal found 10/6C$ 928
Tue 16/910:11 a.m.SEA - BCN
1 stop15h 19mBritish Airways
Sat 27/910:45 a.m.BCN - SEA
1 stop18h 24mBritish Airways
Deal found 10/6C$ 939
Sat 8/117:20 a.m.SEA - BCN
2 stops26h 00mScandinavian Airlines
Fri 14/117:10 p.m.BCN - SEA
2 stops36h 14mScandinavian Airlines
Deal found 10/6C$ 949
Tue 8/77:10 p.m.SEA - BCN
1 stop19h 00mTurkish Airlines
Fri 18/77:50 a.m.BCN - SEA
1 stop18h 25mTurkish Airlines
Deal found 10/6C$ 964
Thu 14/82:50 p.m.SEA - BCN
2 stops23h 45mSWISS
Mon 25/88:00 p.m.BCN - SEA
2 stops31h 36mSWISS
Deal found 10/6C$ 975
Wed 13/812:20 a.m.SEA - BCN
1 stop27h 55mMultiple Airlines
Fri 22/89:40 a.m.BCN - SEA
2 stops17h 56mMultiple Airlines
Deal found 9/6C$ 999
Mon 29/912:59 a.m.SEA - BCN
1 stop24h 31mAlaska Airlines
Fri 17/1012:50 p.m.BCN - SEA
1 stop18h 10mAlaska Airlines
Deal found 11/6C$ 1,055
Fri 28/112:35 p.m.SEA - BCN
1 stop13h 35mIcelandair
Tue 9/1211:45 a.m.BCN - SEA
2 stops19h 05mIcelandair
Deal found 12/6C$ 1,095
Mon 7/77:20 a.m.SEA - BCN
1 stop15h 30mAir Canada
Thu 24/712:10 p.m.BCN - SEA
1 stop17h 31mAir Canada
Deal found 11/6C$ 1,185

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 12 June 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

Wed 1/10

1:00 p.m.-7:50 a.m.

3 stops33h 50m

Barcelona-El Prat

Sun 5/10

12:10 p.m.-6:49 p.m.

2 stops39h 39m

C$ 901

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 9/11

3:10 p.m.-2:45 p.m.

1 stop14h 35m

Barcelona-El Prat

Sat 15/11

6:20 p.m.-1:20 p.m.

1 stop28h 00m

C$ 915

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 8/11

11:35 p.m.-8:40 a.m.

1 stop24h 05m

Barcelona-El Prat

Sun 16/11

6:00 a.m.-8:50 p.m.

2 stops23h 50m

C$ 920

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 8/11

7:00 a.m.-9:10 a.m.

2 stops41h 10m

Barcelona-El Prat

Tue 18/11

8:30 p.m.-6:57 p.m.

2 stops31h 27m

C$ 928

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 16/9

10:11 a.m.-10:30 a.m.

1 stop15h 19m

Barcelona-El Prat

Sat 27/9

10:45 a.m.-8:09 p.m.

1 stop18h 24m

C$ 939

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 8/11

7:20 a.m.-6:20 p.m.

2 stops26h 00m

Barcelona-El Prat

Fri 14/11

7:10 p.m.-10:24 p.m.

2 stops36h 14m

C$ 949

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 8/7

7:10 p.m.-11:10 p.m.

1 stop19h 00m

Barcelona-El Prat

Fri 18/7

7:50 a.m.-5:15 p.m.

1 stop18h 25m

C$ 964

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 14/8

2:50 p.m.-11:35 p.m.

2 stops23h 45m

Barcelona-El Prat

Mon 25/8

8:00 p.m.-6:36 p.m.

2 stops31h 36m

C$ 975

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 13/8

12:20 a.m.-1:15 p.m.

1 stop27h 55m

Barcelona-El Prat

Fri 22/8

9:40 a.m.-6:36 p.m.

2 stops17h 56m

C$ 999

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 29/9

12:59 a.m.-10:30 a.m.

1 stop24h 31m

Barcelona-El Prat

Fri 17/10

12:50 p.m.-10:00 p.m.

1 stop18h 10m

C$ 1,055

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 21 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 9 June 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 31 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, January is the cheapest month in which you can book a flight from Seattle to Barcelona (average of C$ 604). Flying from Seattle to Barcelona in July is currently the most expensive (average of C$ 789). 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 12 June 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 38% on airfare.

Rainfall in Barcelona by month

Plan your trip to Barcelona by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Barcelona ranges from 20.0 - 91.0 mm per month. October is typically the wettest month, when rainfall can reach 91.0 mm. July is typically the driest time to visit Barcelona when rainfall is around 20.0 mm.

Temperature in Barcelona by month

Plan your trip to Barcelona by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Barcelona, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 24.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 9.0 C).

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 12 June 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and Austrian Airlines from Seattle to Barcelona to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying from Seattle to Barcelona round-trip?

    Our cheapest airline available from Seattle to Barcelona is United Airlines. Our recent data shows that you can find tickets from as low as C$ 901 on this airline. Additional options worth looking into are Lufthansa and Delta, starting at C$ 915 and C$ 920 round-trip. Users have found that United Airlines is 25% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Barcelona one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as C$ 660. Users have also found prices from C$ 686 and C$ 782 on Turkish Airlines and British Airways, respectively.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Barcelona (average of C$ 604). Flying from Seattle to Barcelona in July is currently the most expensive (average of C$ 789). 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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 706AverageC$ 840FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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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