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Cheap flights from Seattle to Barcelona from C$ 811

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BCN
5 May — 12 May1
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 30 April 2025.

Round-trip from

C$ 973

One-way from

C$ 811

Popular in

June

Cheapest in

November

Average price

C$ 1,138
SWISS
  • SWISS
  • 16/10-27/10
  • 4 total stops
  • 50h 41m total
  • Seattle to Barcelona
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Delta
  • Delta
  • 15/5
  • 1 total stop
  • 13h 35m total
  • Seattle to Barcelona
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 537 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 30 April 2025.

Thu 16/101:45 p.m.SEA - BCN
2 stops15h 20mSWISS
Mon 27/108:05 p.m.BCN - SEA
2 stops35h 21mSWISS
Deal found 29/4C$ 973
Wed 10/122:00 p.m.SEA - BCN
1 stop17h 15mLufthansa
Sat 10/16:50 a.m.BCN - SEA
1 stop14h 20mLufthansa
Deal found 29/4C$ 977
Wed 10/127:12 a.m.SEA - BCN
2 stops20h 58mUnited Airlines
Sun 11/17:45 a.m.BCN - SEA
1 stop14h 35mUnited Airlines
Deal found 29/4C$ 979
Thu 7/86:40 p.m.SEA - BCN
1 stop13h 30mDelta
Thu 21/89:00 a.m.BCN - SEA
1 stop19h 39mDelta
Deal found 29/4C$ 991
Sun 4/55:13 p.m.SEA - BCN
2 stops30h 47mMultiple Airlines
Tue 20/512:15 p.m.BCN - SEA
1 stop16h 22mMultiple Airlines
Deal found 29/4C$ 1,057
Thu 14/810:55 p.m.SEA - BCN
2 stops34h 15mScandinavian Airlines
Sun 24/87:00 p.m.BCN - SEA
1 stop27h 50mScandinavian Airlines
Deal found 29/4C$ 1,106
Fri 22/85:45 a.m.SEA - BCN
2 stops16h 30mVirgin Atlantic
Wed 27/89:30 a.m.BCN - SEA
2 stops21h 55mVirgin Atlantic
Deal found 29/4C$ 1,117
Sat 18/107:10 p.m.SEA - BCN
1 stop36h 55mTurkish Airlines
Thu 23/107:50 a.m.BCN - SEA
1 stop18h 25mTurkish Airlines
Deal found 29/4C$ 1,132
Tue 2/912:59 a.m.SEA - BCN
1 stop24h 31mAlaska Airlines
Tue 23/910:45 a.m.BCN - SEA
1 stop16h 07mAlaska Airlines
Deal found 29/4C$ 1,179
Thu 14/81:15 p.m.SEA - BCN
2 stops38h 10mWestJet
Sun 24/82:25 p.m.BCN - SEA
2 stops31h 06mWestJet
Deal found 29/4C$ 1,182
Fri 17/108:00 a.m.SEA - BCN
2 stops40h 10mAustrian Airlines
Sun 26/109:35 a.m.BCN - SEA
2 stops44h 54mAustrian Airlines
Deal found 29/4C$ 1,203
Thu 7/81:32 p.m.SEA - BCN
2 stops17h 28mBritish Airways
Mon 18/89:10 p.m.BCN - SEA
1 stop23h 00mBritish Airways
Deal found 29/4C$ 1,239

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 April 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 16/10

1:45 p.m.-2:05 p.m.

2 stops15h 20m

Barcelona-El Prat

Mon 27/10

8:05 p.m.-11:26 p.m.

2 stops35h 21m

C$ 973

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 19/9

11:54 p.m.-1:15 p.m.

1 stop28h 21m

Barcelona-El Prat

Sun 5/10

1:15 p.m.-11:09 a.m.

1 stop30h 54m

C$ 980

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 17/10

6:50 p.m.-9:40 p.m.

1 stop17h 50m

Barcelona-El Prat

Mon 27/10

3:30 p.m.-2:20 p.m.

1 stop30h 50m

C$ 981

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 7/8

6:40 p.m.-5:10 p.m.

1 stop13h 30m

Barcelona-El Prat

Thu 21/8

9:00 a.m.-7:39 p.m.

1 stop19h 39m

C$ 991

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 18/10

8:20 p.m.-6:25 p.m.

1 stop13h 05m

Barcelona-El Prat

Fri 24/10

9:25 p.m.-11:35 a.m.

1 stop23h 10m

C$ 1,057

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 14/8

10:55 p.m.-6:10 p.m.

2 stops34h 15m

Barcelona-El Prat

Sun 24/8

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

1 stop27h 50m

C$ 1,106

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 22/8

5:45 a.m.-7:15 a.m.

2 stops16h 30m

Barcelona-El Prat

Wed 27/8

9:30 a.m.-10:25 p.m.

2 stops21h 55m

C$ 1,117

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 18/10

7:10 p.m.-5:05 p.m.

1 stop36h 55m

Barcelona-El Prat

Thu 23/10

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

1 stop18h 25m

C$ 1,132

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 16/9

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

1 stop24h 31m

Barcelona-El Prat

Thu 25/9

12:50 p.m.-9:50 p.m.

1 stop18h 00m

C$ 1,159

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 6/8

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

1 stop27h 55m

Barcelona-El Prat

Thu 21/8

1:15 p.m.-11:10 a.m.

1 stop30h 55m

C$ 1,163

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 25 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 25 April 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 11 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$ 802). 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 April 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 30 April 2025.
Peruse reviews from past customers who have flown with Asiana Airlines, Delta and Alaska 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.
Asiana Airlines
8.2
Very good
442 reviews
Check prices

Boarding

8.3

Comfort

8.0

Food

8.0

Entertainment

7.7

Crew

8.5

Overall

8.2

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Asiana Airlines
8.2
Very good
442 reviews
Asiana Airlines
8.2
Very good
442 reviews
Check prices

Boarding

8.3

Comfort

8.0

Food

8.0

Entertainment

7.7

Crew

8.5

Overall

8.2

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Delta
8.0
Very good
7,929 reviews
Asiana Airlines
8.2
Very good
442 reviews
Check prices

Boarding

8.3

Comfort

8.0

Food

8.0

Entertainment

7.7

Crew

8.5

Overall

8.2

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Alaska Airlines
8.0
Very good
9,961 reviews
Asiana Airlines
8.2
Very good
442 reviews
Check prices

Boarding

8.3

Comfort

8.0

Food

8.0

Entertainment

7.7

Crew

8.5

Overall

8.2

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
KLM
7.8
Good
1,334 reviews
Asiana Airlines
8.2
Very good
442 reviews
Check prices

Boarding

8.3

Comfort

8.0

Food

8.0

Entertainment

7.7

Crew

8.5

Overall

8.2

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Austrian Airlines
7.6
Good
780 reviews
Asiana Airlines
8.2
Very good
442 reviews
Check prices

Boarding

8.3

Comfort

8.0

Food

8.0

Entertainment

7.7

Crew

8.5

Overall

8.2

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

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 SWISS. Our recent data shows that you can find tickets from as low as C$ 973 on this airline. Additional options worth looking into are United Airlines and Lufthansa, starting at C$ 980 and C$ 981 round-trip. Users have found that SWISS is 22% 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 Delta. According to our data, you can fly for as low as C$ 811. Users have also found prices from C$ 850 and C$ 952 on United Airlines and WestJet, 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$ 802). 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 715AverageC$ 791FlexibilityNo 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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