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Cheap flights from Seattle to Barcelona from C$ 386

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
21 Jan — 28 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap 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 22 December 2025.

Thu 25/125:40 p.m.SEA - BCN
2 stops20h 20mMultiple Airlines
Tue 30/125:50 a.m.BCN - SEA
1 stop18h 50mMultiple Airlines
Deal found 19/12C$ 2,237
Wed 24/125:02 a.m.SEA - BCN
2 stops27h 33mUnited Airlines
Thu 1/11:35 p.m.BCN - SEA
2 stops38h 11mUnited Airlines
Deal found 19/12C$ 2,739
Thu 25/126:00 a.m.SEA - BCN
2 stops21h 40mIberia
Tue 30/129:15 a.m.BCN - SEA
2 stops20h 56mIberia
Deal found 19/12C$ 2,805
Wed 24/126:50 p.m.SEA - BCN
1 stop14h 35mBritish Airways
Wed 31/126:40 a.m.BCN - SEA
1 stop19h 15mBritish Airways
Deal found 21/12C$ 2,936
Mon 29/122:05 p.m.SEA - BCN
1 stop15h 55mDelta
Mon 5/11:00 p.m.BCN - SEA
1 stop31h 50mDelta
Deal found 21/12C$ 3,048
Sun 28/1210:30 a.m.SEA - BCN
2 stops19h 30mDelta
Mon 5/11:00 p.m.BCN - SEA
1 stop31h 50mDelta
Deal found 21/12C$ 3,053
Sat 27/1210:55 p.m.SEA - BCN
1 stop24h 45mDelta
Mon 5/111:10 a.m.BCN - SEA
1 stop33h 40mDelta
Deal found 21/12C$ 3,153

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 22 December 2025.

Round-trip from

C$ 642

One-way from

C$ 386

Popular in

June

Cheapest in

February

Average price

C$ 1,526
United Airlines
  • United Airlines
  • 19/1-27/1
  • 3 total stops
  • 52h 26m total
  • Seattle to Barcelona
Search Deals
3/2
  • 3/2
  • 2 total stops
  • 19h 05m total
  • Seattle to Barcelona
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (C$ 535 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 71 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 22 December 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

Thu 19/2

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

1 stop15h 03m

Barcelona-El Prat

Tue 17/3

12:35 p.m.-7:03 p.m.

2 stops38h 28m

C$ 642

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 19/1

5:00 a.m.-5:35 p.m.

2 stops27h 35m

Barcelona-El Prat

Tue 27/1

1:35 p.m.-11:32 a.m.

2 stops30h 57m

C$ 651

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 18/1

1:45 p.m.-8:00 a.m.

1 stop33h 15m

Barcelona-El Prat

Tue 3/2

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

2 stops22h 54m

C$ 655

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 16/2

2:15 p.m.-5:05 p.m.

1 stop17h 50m

Barcelona-El Prat

Mon 23/2

1:00 p.m.-11:40 a.m.

1 stop31h 40m

C$ 662

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 17/2

1:40 p.m.-5:05 p.m.

1 stop18h 25m

Barcelona-El Prat

Tue 24/2

1:00 p.m.-11:40 a.m.

1 stop31h 40m

C$ 662

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 16/2

2:00 p.m.-4:20 p.m.

1 stop17h 20m

Barcelona-El Prat

Tue 24/2

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

2 stops38h 28m

C$ 662

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 17/2

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

1 stop12h 30m

Barcelona-El Prat

Mon 23/2

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

1 stop33h 30m

C$ 662

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 16/2

2:15 p.m.-2:00 p.m.

1 stop14h 45m

Barcelona-El Prat

Tue 24/2

1:00 p.m.-11:40 a.m.

1 stop31h 40m

C$ 662

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 16/2

10:20 p.m.-5:05 p.m.

2 stops33h 45m

Barcelona-El Prat

Wed 25/2

1:00 p.m.-11:40 a.m.

1 stop31h 40m

C$ 669

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 3/2

3:10 p.m.-11:30 p.m.

3 stops23h 20m

C$ 417

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/12

Showing 1-10 of 18 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 19 December 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 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?

Currently, January is the cheapest month in which you can book a flight from Seattle to Barcelona (average of C$ 488). Flying from Seattle to Barcelona in June is currently the most expensive (average of C$ 1,192). 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 22 December 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.

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. 0 airlines 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 03m. The distance between Seattle and Barcelona is about 8724 km. This flight may include one or multiple stops.

  • 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$ 488). Flying from Seattle to Barcelona in June is currently the most expensive (average of C$ 1,192). 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

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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