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Cheap flights from Seattle to Barcelona from $250

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Barcelona departing on 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
7:20 am - 6:10 pmSEA-BCN
25h 50m2 stops
Scandinavian Airlines Logo
7:00 pm - 11:35 pmBCN-SEA
37h 35m2 stops
$602Scandinavian Airlines
Find Deal
Wed, Apr 15 - Thu, Apr 23
Turkish Airlines Logo
8:00 pm - 5:05 pmSEA-BCN
37h 05m1 stop
Turkish Airlines Logo
6:35 pm - 5:15 pmBCN-SEA
31h 40m1 stop
$603Turkish Airlines
Find Deal
Tue, Mar 17 - Tue, Mar 31
United Airlines Logo
12:37 pm - 9:35 amSEA-BCN
35h 58m3 stops
United Airlines Logo
1:55 pm - 10:43 pmBCN-SEA
41h 48m2 stops
$607United Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
Scandinavian Airlines Logo
7:10 am - 6:20 pmSEA-BCN
26h 10m2 stops
Scandinavian Airlines Logo
7:10 pm - 9:59 pmBCN-SEA
35h 49m2 stops
$608Scandinavian Airlines
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Fri, Dec 5 - Sun, Dec 14
Multiple Airlines Logo
8:05 pm - 11:35 pmSEA-BCN
18h 30m1 stop
Multiple Airlines Logo
12:55 pm - 6:20 pmBCN-SEA
14h 25m1 stop
$609Multiple Airlines
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Fri, Feb 27 - Fri, Mar 6
Multiple Airlines Logo
10:05 am - 4:35 pmSEA-BCN
21h 30m3 stops
Multiple Airlines Logo
5:55 pm - 1:10 pmBCN-SEA
27h 15m2 stops
$612Multiple Airlines
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Fri, Mar 6 - Sun, Mar 15
Lufthansa Logo
3:40 pm - 9:35 amSEA-BCN
32h 55m2 stops
Lufthansa Logo
6:50 am - 12:10 pmBCN-SEA
14h 20m1 stop
$614Lufthansa
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Tue, Dec 2 - Sat, Dec 13
Multiple Airlines Logo
5:50 am - 11:55 pmSEA-BCN
33h 05m3 stops
Multiple Airlines Logo
7:20 am - 9:31 amBCN-SEA
35h 11m3 stops
$616Multiple Airlines
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Thu, Dec 11 - Wed, Dec 24
Air Canada Logo
8:10 am - 5:35 pmSEA-BCN
24h 25m2 stops
Air Canada Logo
1:35 pm - 10:16 pmBCN-SEA
41h 41m2 stops
$618Air Canada
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Fri, Dec 12 - Tue, Dec 23
Aer Lingus Logo
6:45 pm - 10:25 pmSEA-BCN
18h 40m1 stop
Aer Lingus Logo
11:00 am - 4:59 pmBCN-SEA
14h 59m1 stop
$619Aer Lingus
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Wed, Apr 22 - Thu, May 7

United Airlines flights from Seattle to Barcelona-El Prat Airport

Our best United Airlines deals on Seattle to Barcelona-El Prat Airport flight tickets
United Airlines
Feb 14
SEA12:37 pmSeattle/Tacoma Intl
35h 58m
3 stops
BCN9:35 amBarcelona-El Prat
Feb 21
BCN1:55 pmBarcelona-El Prat
41h 48m
2 stops
SEA10:43 pmSeattle/Tacoma Intl
$607
Find similar
United Airlines
Dec 2
SEA8:10 amSeattle/Tacoma Intl
15h 10m
1 stop
BCN8:20 amBarcelona-El Prat
Dec 12
BCN6:50 amBarcelona-El Prat
14h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$676
Find similar

Air Canada flights from Seattle to Barcelona-El Prat Airport

Our best Air Canada deals on Seattle to Barcelona-El Prat Airport flight tickets
Air Canada
Dec 12
SEA8:10 amSeattle/Tacoma Intl
24h 25m
2 stops
BCN5:35 pmBarcelona-El Prat
Dec 23
BCN1:35 pmBarcelona-El Prat
41h 41m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$618
Find similar
Air Canada
Nov 29
SEA8:00 pmSeattle/Tacoma Intl
28h 35m
2 stops
BCN9:35 amBarcelona-El Prat
Dec 7
BCN6:50 amBarcelona-El Prat
21h 26m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$656
Find similar
Air Canada
Dec 2
SEA5:50 amSeattle/Tacoma Intl
42h 45m
2 stops
BCN9:35 amBarcelona-El Prat
Dec 16
BCN1:35 pmBarcelona-El Prat
33h 56m
2 stops
SEA2:31 pmSeattle/Tacoma Intl
$669
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Barcelona-El Prat Airport 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, momondo users made 832,500 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from Seattle to Barcelona-El Prat Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 4/15

7:20 am-6:10 pm

2 stops25h 50m

Barcelona-El Prat

Thu 4/23

7:00 pm-11:35 pm

2 stops37h 35m

$602

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 3/17

8:00 pm-5:05 pm

1 stop37h 05m

Barcelona-El Prat

Tue 3/31

6:35 pm-5:15 pm

1 stop31h 40m

$603

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 2/14

12:37 pm-9:35 am

3 stops35h 58m

Barcelona-El Prat

Sat 2/21

1:55 pm-10:43 pm

2 stops41h 48m

$607

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 12/5

7:10 am-6:20 pm

2 stops26h 10m

Barcelona-El Prat

Sun 12/14

7:10 pm-9:59 pm

2 stops35h 49m

$608

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 2/27

8:05 pm-11:35 pm

1 stop18h 30m

Barcelona-El Prat

Fri 3/6

12:55 pm-6:20 pm

1 stop14h 25m

$609

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 3/6

10:05 am-4:35 pm

3 stops21h 30m

Barcelona-El Prat

Sun 3/15

5:55 pm-1:10 pm

2 stops27h 15m

$612

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 12/2

3:40 pm-9:35 am

2 stops32h 55m

Barcelona-El Prat

Sat 12/13

6:50 am-12:10 pm

1 stop14h 20m

$614

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 12/11

5:50 am-11:55 pm

3 stops33h 05m

Barcelona-El Prat

Wed 12/24

7:20 am-9:31 am

3 stops35h 11m

$616

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 12/12

8:10 am-5:35 pm

2 stops24h 25m

Barcelona-El Prat

Tue 12/23

1:35 pm-10:16 pm

2 stops41h 41m

$618

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 4/22

6:45 pm-10:25 pm

1 stop18h 40m

Barcelona-El Prat

Thu 5/7

11:00 am-4:59 pm

1 stop14h 59m

$619

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to Barcelona-El Prat Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Barcelona-El Prat Airport?

The cheapest month to fly to Barcelona-El Prat Airport from Seattle is in February. Flight prices, which tend to average around $669, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Barcelona-El Prat Airport from Seattle during October instead. Flights to Barcelona-El Prat Airport in October, while not as cheap as those in February, still average around $672.

What is the cheapest day to depart on your flight to Barcelona-El Prat Airport?

The cheapest day to depart on your flight to Barcelona-El Prat Airport is on a Sunday when prices can be found for as low as $876. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $2,579. These prices are subject to change though, so be sure to set up a Price Alert for flights to Barcelona-El Prat Airport.

What is the cheapest time of day to depart on your flight to Barcelona-El Prat Airport?

Flying to Barcelona-El Prat Airport from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $888 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $2,198 on average. Flights to Barcelona-El Prat Airport from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Seattle/Tacoma Intl to Barcelona-El Prat flight route?

Fly from Seattle/Tacoma Intl to Barcelona-El Prat for the best Seattle/Tacoma Intl - Barcelona-El Prat flight prices

How far in advance should I book a flight to Barcelona-El Prat Airport?

You are more likely to see cheaper flights to Barcelona-El Prat Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona-El Prat Airport for around $848 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona-El Prat Airport from Seattle for as low as $721 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Barcelona-El Prat flights?

There is only 1 cabin class available to choose from on Seattle/Tacoma Intl to Barcelona-El Prat flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to Barcelona-El Prat Airport flight prices changed over time?

As of November 2025, prices for Seattle to Barcelona-El Prat Airport flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Barcelona-El Prat Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Barcelona-El Prat Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Barcelona-El Prat Airport (SEA to BCN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Barcelona-El Prat Airport

Best Price Found

$1,625

Fastest flight time

10h 30m

Direct flights

Wed and Sun
The best flight deal from Seattle to Barcelona-El Prat Airport found on momondo in the last 72 hours is $1,625
The fastest flight from Seattle to Barcelona-El Prat Airport takes 10h 30m
Direct flights go from Seattle to Barcelona-El Prat Airport on Wednesday and Sunday. There are no airlines offering direct flights.
Search flight deals

  • How far is Seattle/Tacoma Intl to Barcelona-El Prat by plane?

    There are 5412.9 mi between Seattle/Tacoma Intl and Barcelona-El Prat. 14h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Barcelona-El Prat Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Barcelona-El Prat Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Barcelona-El Prat Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Barcelona-El Prat Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Barcelona-El Prat Airport.

  • What documentation or ID do you need to fly to Barcelona-El Prat Airport?

    The travel and health documents required for your trip to Barcelona-El Prat Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Barcelona-El Prat Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Seattle to Barcelona-El Prat Airport?

  • What is the most popular airline from Seattle to Barcelona-El Prat Airport?

Best airlines flying from Seattle to Barcelona-El Prat Airport

Compare and see reviews for airlines that fly from Seattle to Barcelona-El Prat Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $389Free CancellationRating
7.1
578 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $465Free CancellationRating
7.4
1,575 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $478Free CancellationRating
7.1
10,444 reviews
Search Air Canada flights
United AirlinesPriceFrom $492Free CancellationRating
7.4
9,015 reviews
Search United Airlines flights
Aer LingusPriceFrom $498Free CancellationRating
7.2
1,370 reviews
Search Aer Lingus flights
IberiaPriceFrom $507Free CancellationRating
7.0
3,010 reviews
Search Iberia flights
British AirwaysPriceFrom $549Free CancellationRating
6.7
7,516 reviews
Search British Airways flights
LufthansaPriceFrom $562Free CancellationRating
6.8
7,570 reviews
Search Lufthansa flights
KLMPriceFrom $574Free CancellationRating
7.7
1,410 reviews
Search KLM flights
American AirlinesPriceFrom $590Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights

Traveling to a place near Barcelona?

Book flights to Barcelona if you plan to visit one of these locations
Lloret de Mar
Sitges
Salou
Tossa de Mar
Castelldefels
El Prat de Llobregat
L'Hospitalet de Llobregat
Tarragona
Santa Susanna
Cambrils
Cadaques
Empuriabrava
Pineda de Mar
Roses
Badalona
Calella
Pals
Palafrugell
Tortosa
La Pineda

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Barcelona?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Barcelona. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to Barcelona with flexible booking policies on momondo?

Flights from Seattle to Barcelona with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Barcelona?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Barcelona from Seattle.

I’m not ready to book a flight from Seattle to Barcelona right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Barcelona from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Barcelona-El Prat Airport trip

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