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Cheap flights from Seattle to Barcelona from C$ 478

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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
15 Aug — 22 Aug1
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 16 July 2026.

Mon 12/106:10 p.m.
SEA
-
BCN
1 stop19h 00m
Multiple Airlines
Tue 20/108:00 a.m.
BCN
-
SEA
2 stops22h 25m
Multiple Airlines
Deal found 14/7C$ 969
Fri 11/96:00 p.m.
SEA
-
BCN
1 stop19h 10m
Condor
Fri 25/98:00 a.m.
BCN
-
SEA
1 stop17h 00m
Condor
Deal found 13/7C$ 978
Tue 6/1011:55 a.m.
SEA
-
BCN
2 stops25h 15m
Multiple Airlines
Tue 20/1010:25 a.m.
BCN
-
SEA
1 stop14h 15m
Multiple Airlines
Deal found 13/7C$ 983
Sun 23/83:40 p.m.
SEA
-
BCN
1 stop14h 05m
Icelandair
Thu 10/93:45 p.m.
BCN
-
SEA
1 stop13h 55m
Icelandair
Deal found 14/7C$ 985
Sat 22/811:25 p.m.
SEA
-
BCN
1 stop30h 20m
Icelandair
Thu 10/93:45 p.m.
BCN
-
SEA
1 stop13h 55m
Icelandair
Deal found 12/7C$ 988
Sat 22/811:25 p.m.
SEA
-
BCN
1 stop30h 20m
Icelandair
Wed 9/93:45 p.m.
BCN
-
SEA
1 stop29h 00m
Icelandair
Deal found 12/7C$ 990
Mon 12/106:10 p.m.
SEA
-
BCN
1 stop19h 00m
Multiple Airlines
Thu 22/108:00 a.m.
BCN
-
SEA
2 stops22h 25m
Multiple Airlines
Deal found 14/7C$ 997
Sun 4/101:30 p.m.
SEA
-
BCN
1 stop14h 10m
British Airways
Thu 15/1010:15 a.m.
BCN
-
SEA
1 stop17h 10m
British Airways
Deal found 16/7C$ 1,003
Wed 7/1011:30 a.m.
SEA
-
BCN
2 stops25h 40m
Multiple Airlines
Wed 21/1010:25 a.m.
BCN
-
SEA
1 stop14h 15m
Multiple Airlines
Deal found 13/7C$ 1,012
Mon 12/103:40 p.m.
SEA
-
BCN
1 stop14h 05m
Icelandair
Sat 24/103:45 p.m.
BCN
-
SEA
1 stop13h 55m
Icelandair
Deal found 15/7C$ 1,023
Wed 2/129:25 a.m.
SEA
-
BCN
2 stops19h 15m
Multiple Airlines
Sun 13/122:45 p.m.
BCN
-
SEA
1 stop35h 15m
Multiple Airlines
Deal found 14/7C$ 1,024
Sun 9/85:40 p.m.
SEA
-
BCN
1 stop13h 20m
Condor
Sat 29/88:00 a.m.
BCN
-
SEA
1 stop17h 00m
Condor
Deal found 15/7C$ 1,026

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 16 July 2026.

Round-trip from

C$ 969

One-way from

C$ 478

Popular in

June

Cheapest in

January

Average price

C$ 1,332
12/10-20/10
  • 12/10-20/10
  • 3 total stops
  • 41h 25m total
  • Seattle to Barcelona
Search Deals
11/9
  • 11/9
  • 2 total stops
  • 30h 40m total
  • Seattle to Barcelona
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 362 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 73 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 16 July 2026.
Use the filters below to find and compare flights from Seattle to Barcelona that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 14/10

6:28 a.m.-10:10 p.m.

2 stops30h 42m

Barcelona-El Prat

Mon 26/10

7:00 a.m.-4:55 p.m.

1 stop17h 55m

C$ 1,026

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 2/10

6:00 p.m.-10:10 p.m.

1 stop19h 10m

Barcelona-El Prat

Thu 22/10

8:00 a.m.-9:25 p.m.

2 stops22h 25m

C$ 1,048

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 11/9

6:00 p.m.-10:10 p.m.

1 stop19h 10m

Barcelona-El Prat

Fri 25/9

8:00 a.m.-9:40 p.m.

2 stops22h 40m

C$ 1,132

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 9/9

10:47 a.m.-10:10 p.m.

2 stops26h 23m

Barcelona-El Prat

Tue 22/9

8:00 a.m.-8:32 p.m.

2 stops21h 32m

C$ 1,180

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 14/9

6:10 p.m.-10:10 p.m.

1 stop19h 00m

Barcelona-El Prat

Fri 18/9

8:00 a.m.-11:12 p.m.

2 stops24h 12m

C$ 1,180

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 12/9

12:35 p.m.-10:45 a.m.

1 stop37h 10m

Barcelona-El Prat

Sun 20/9

12:10 p.m.-5:20 p.m.

1 stop38h 10m

C$ 1,207

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 5/8

11:42 a.m.-10:10 p.m.

2 stops25h 28m

Barcelona-El Prat

Mon 10/8

10:15 a.m.-4:10 p.m.

1 stop14h 55m

C$ 1,208

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 28/7

8:53 a.m.-10:10 p.m.

2 stops28h 17m

Barcelona-El Prat

Mon 10/8

8:00 a.m.-4:10 p.m.

1 stop17h 10m

C$ 1,257

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 12/9

11:04 p.m.-8:20 a.m.

1 stop24h 16m

Barcelona-El Prat

Fri 25/9

6:40 a.m.-10:42 p.m.

2 stops25h 02m

C$ 1,346

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 10/8

10:03 a.m.-10:10 p.m.

2 stops27h 07m

Barcelona-El Prat

Mon 17/8

10:15 a.m.-4:10 p.m.

1 stop14h 55m

C$ 1,401

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/7

Showing 1-10 of 23 resultsSorted by cheapest first
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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

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$ 464). Flying from Seattle to Barcelona in June is currently the most expensive (average of C$ 917). 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 16 July 2026.

When flying from Seattle to Barcelona, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Seattle to Barcelona?

How often are flights from Seattle to Barcelona delayed?

About 6% of weekly flights between Seattle and Barcelona have experienced delays in the past year, with the average delay time being 153 minutes.

What is the most punctual flight time for Seattle to Barcelona flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Seattle to Barcelona flights?

Over the past year, Delta has had the lowest number of delays on this route, with just 6% of flights being delayed.

How far ahead should I book a flight from Seattle to Barcelona?

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 71 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 1 outbound flight to Barcelona per day.

  • What are the most reliable airlines from Seattle to Barcelona?

    No one likes to see their flight delayed. When booking a flight from Seattle to Barcelona consider choosing KLM (85%), Air France (85%) or Delta (85%) as they are the most reliable in getting you off to your destination on time.

  • 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$ 464). Flying from Seattle to Barcelona in June is currently the most expensive (average of C$ 917). 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

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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