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Cheap flights from Seattle to Barcelona from $355

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 9/15. 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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Find the cheapest flights from Seattle to Barcelona (SEA-BCN)

Cheap round-trip flights

Logo
3:45 pm - 1:30 amSEA-BCN
24h 45m2 stops
Logo
7:20 am - 8:40 pmBCN-SEA
22h 20m2 stops
$608
Find Deal
Wed, Oct 1 - Fri, Oct 10
Scandinavian Airlines Logo
5:56 pm - 6:10 pmSEA-BCN
39h 14m2 stops
Scandinavian Airlines Logo
7:00 pm - 2:00 pmBCN-SEA
28h 00m1 stop
$609Scandinavian Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 21
Scandinavian Airlines Logo
4:20 pm - 6:10 pmSEA-BCN
16h 50m1 stop
Scandinavian Airlines Logo
10:30 am - 2:00 pmBCN-SEA
36h 30m2 stops
$610Scandinavian Airlines
Find Deal
Wed, Sep 17 - Thu, Sep 25
Logo
4:20 pm - 9:40 pmSEA-BCN
20h 20m2 stops
Logo
1:10 pm - 2:00 pmBCN-SEA
33h 50m3 stops
$611
Find Deal
Fri, Oct 10 - Thu, Oct 16
Scandinavian Airlines Logo
4:20 pm - 8:50 amSEA-BCN
31h 30m1 stop
Scandinavian Airlines Logo
7:00 pm - 10:01 pmBCN-SEA
36h 01m2 stops
$612Scandinavian Airlines
Find Deal
Fri, Sep 26 - Fri, Oct 3
Aer Lingus Logo
7:35 pm - 10:25 pmSEA-BCN
17h 50m1 stop
Aer Lingus Logo
11:00 am - 5:50 pmBCN-SEA
15h 50m1 stop
$625Aer Lingus
Find Deal
Fri, Sep 26 - Wed, Oct 1
Icelandair Logo
2:35 pm - 1:20 pmSEA-BCN
13h 45m1 stop
Icelandair Logo
11:50 am - 5:00 pmBCN-SEA
14h 10m1 stop
$629Icelandair
Find Deal
Fri, Nov 7 - Sun, Nov 23
Aer Lingus Logo
7:35 pm - 10:25 pmSEA-BCN
17h 50m1 stop
Aer Lingus Logo
11:00 am - 5:50 pmBCN-SEA
15h 50m1 stop
$632Aer Lingus
Find Deal
Sat, Oct 4 - Tue, Oct 14
Turkish Airlines Logo
12:30 pm - 10:35 amSEA-BCN
37h 05m1 stop
Turkish Airlines Logo
7:40 am - 6:05 pmBCN-SEA
18h 25m1 stop
$637Turkish Airlines
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Tue, Oct 7 - Wed, Oct 29
Turkish Airlines Logo
7:10 pm - 5:05 pmSEA-BCN
36h 55m1 stop
Turkish Airlines Logo
12:00 pm - 10:35 amBCN-SEA
31h 35m1 stop
$660Turkish Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 1

Turkish Airlines flights from Seattle to Barcelona-El Prat Airport

Our best Turkish Airlines deals on Seattle to Barcelona-El Prat Airport flight tickets
Turkish Airlines
Oct 7
SEA12:30 pmSeattle/Tacoma Intl
37h 05m
1 stop
BCN10:35 amBarcelona-El Prat
Oct 29
BCN7:40 amBarcelona-El Prat
18h 25m
1 stop
SEA6:05 pmSeattle/Tacoma Intl
$637
Find similar
Turkish Airlines
Sep 24
SEA7:10 pmSeattle/Tacoma Intl
36h 55m
1 stop
BCN5:05 pmBarcelona-El Prat
Oct 1
BCN12:00 pmBarcelona-El Prat
31h 35m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$660
Find similar
Turkish Airlines
Sep 24
SEA7:10 pmSeattle/Tacoma Intl
19h 00m
1 stop
BCN11:10 pmBarcelona-El Prat
Oct 1
BCN6:30 pmBarcelona-El Prat
25h 05m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$679
Find similar

Aer Lingus flights from Seattle to Barcelona-El Prat Airport

Our best Aer Lingus deals on Seattle to Barcelona-El Prat Airport flight tickets
Aer Lingus
Sep 26
SEA7:35 pmSeattle/Tacoma Intl
17h 50m
1 stop
BCN10:25 pmBarcelona-El Prat
Oct 1
BCN11:00 amBarcelona-El Prat
15h 50m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$625
Find similar
Aer Lingus
Oct 4
SEA7:35 pmSeattle/Tacoma Intl
17h 50m
1 stop
BCN10:25 pmBarcelona-El Prat
Oct 14
BCN11:00 amBarcelona-El Prat
15h 50m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$632
Find similar
Aer Lingus
Oct 11
SEA7:35 pmSeattle/Tacoma Intl
17h 50m
1 stop
BCN10:25 pmBarcelona-El Prat
Oct 22
BCN11:00 amBarcelona-El Prat
15h 50m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$658
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 August 28, 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 10/1

3:45 pm-1:30 am

2 stops24h 45m

Barcelona-El Prat

Fri 10/10

7:20 am-8:40 pm

2 stops22h 20m

$608

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 10/5

5:56 pm-6:10 pm

2 stops39h 14m

Barcelona-El Prat

Tue 10/21

7:00 pm-2:00 pm

1 stop28h 00m

$609

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 9/17

4:20 pm-6:10 pm

1 stop16h 50m

Barcelona-El Prat

Thu 9/25

10:30 am-2:00 pm

2 stops36h 30m

$610

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 10/10

4:20 pm-9:40 pm

2 stops20h 20m

Barcelona-El Prat

Thu 10/16

1:10 pm-2:00 pm

3 stops33h 50m

$611

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 9/26

4:20 pm-8:50 am

1 stop31h 30m

Barcelona-El Prat

Fri 10/3

7:00 pm-10:01 pm

2 stops36h 01m

$612

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 9/26

7:35 pm-10:25 pm

1 stop17h 50m

Barcelona-El Prat

Wed 10/1

11:00 am-5:50 pm

1 stop15h 50m

$625

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 11/7

2:35 pm-1:20 pm

1 stop13h 45m

Barcelona-El Prat

Sun 11/23

11:50 am-5:00 pm

1 stop14h 10m

$629

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 10/4

7:35 pm-10:25 pm

1 stop17h 50m

Barcelona-El Prat

Tue 10/14

11:00 am-5:50 pm

1 stop15h 50m

$632

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Tue 10/7

12:30 pm-10:35 am

1 stop37h 05m

Barcelona-El Prat

Wed 10/29

7:40 am-6:05 pm

1 stop18h 25m

$637

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 9/24

7:10 pm-5:05 pm

1 stop36h 55m

Barcelona-El Prat

Wed 10/1

12:00 pm-10:35 am

1 stop31h 35m

$660

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Barcelona from

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 November. Flight prices, which tend to average around $667, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Barcelona-El Prat Airport from Seattle during February instead. Flights to Barcelona-El Prat Airport in February, while not as cheap as those in November, still average around $674.

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 Monday when prices can be found for as low as $862. 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 Friday because tickets tend to average around $986. 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 $1,924 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 $853 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 $718 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 August 2025, prices for Seattle to Barcelona-El Prat Airport flights are approximately 14% 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

$1,924

Direct flights

None
The best flight deal from Seattle to Barcelona-El Prat Airport found on momondo in the last 72 hours is $1,924
There are no direct flights from Seattle to Barcelona-El Prat Airport. There are no popular flight routes from Seattle to Barcelona-El Prat Airport.
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. 13h 20m 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 $414Free CancellationRating
7.0
534 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $465Free CancellationRating
7.4
1,481 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $484Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Aer LingusPriceFrom $498Free CancellationRating
7.2
1,239 reviews
Search Aer Lingus flights
IberiaPriceFrom $507Free CancellationRating
7.0
2,892 reviews
Search Iberia flights
British AirwaysPriceFrom $555Free CancellationRating
6.7
7,316 reviews
Search British Airways flights
United AirlinesPriceFrom $557Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights
KLMPriceFrom $574Free CancellationRating
7.8
1,382 reviews
Search KLM flights
LufthansaPriceFrom $581Free CancellationRating
6.8
7,368 reviews
Search Lufthansa flights
American AirlinesPriceFrom $590Free CancellationRating
7.2
10,000 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
L'Hospitalet de Llobregat
Tarragona
El Prat de Llobregat
Castelldefels
Santa Susanna
Badalona
Cambrils
Calella
Cadaques
Empuriabrava
Pineda de Mar
Roses
Pals
Malgrat de Mar
Palafrugell
Tortosa

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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