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Cheap flights from Seattle to Barcelona from $251

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 1/29. 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.
Multiple Airlines Logo
10:05 am - 5:35 pmSEA-BCN
22h 30m2 stops
Multiple Airlines Logo
7:40 am - 1:20 pmBCN-SEA
14h 40m1 stop
$460Multiple Airlines
Find Deal
Fri, Dec 5 - Wed, Dec 17
United Airlines Logo
11:45 pm - 9:35 amSEA-BCN
24h 50m2 stops
United Airlines Logo
1:35 pm - 7:03 pmBCN-SEA
38h 28m2 stops
$461United Airlines
Find Deal
Sat, Feb 14 - Tue, Feb 24
Air Canada Logo
5:50 am - 9:35 amSEA-BCN
18h 45m2 stops
Air Canada Logo
6:50 am - 10:06 pmBCN-SEA
24h 16m2 stops
$472Air Canada
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Wed, Jan 14 - Sun, Jan 25
Lufthansa Logo
3:10 pm - 5:35 pmSEA-BCN
17h 25m1 stop
Lufthansa Logo
6:50 am - 7:16 pmBCN-SEA
21h 26m2 stops
$477Lufthansa
Find Deal
Fri, Nov 28 - Thu, Dec 4
Delta Logo
2:05 pm - 3:00 pmSEA-BCN
15h 55m1 stop
Delta Logo
6:00 am - 11:50 amBCN-SEA
14h 50m1 stop
$479Delta
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Fri, Dec 5 - Sun, Dec 14
Delta Logo
7:20 am - 8:00 amSEA-BCN
15h 40m1 stop
Delta Logo
6:00 am - 11:50 amBCN-SEA
14h 50m1 stop
$480Delta
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Wed, Dec 3 - Sun, Dec 14
Aer Lingus Logo
8:05 pm - 8:25 pmSEA-BCN
15h 20m1 stop
Aer Lingus Logo
11:30 am - 6:20 pmBCN-SEA
15h 50m1 stop
$492Aer Lingus
Find Deal
Wed, Dec 10 - Wed, Dec 17
Lufthansa Logo
2:00 pm - 7:50 pmSEA-BCN
20h 50m1 stop
Lufthansa Logo
6:50 am - 12:10 pmBCN-SEA
14h 20m1 stop
$493Lufthansa
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Thu, Feb 12 - Sat, Feb 21
Air Canada Logo
8:10 am - 4:20 pmSEA-BCN
23h 10m2 stops
Air Canada Logo
5:50 am - 7:16 pmBCN-SEA
22h 26m2 stops
$499Air Canada
Find Deal
Fri, Feb 13 - Fri, Feb 20
Aer Lingus Logo
8:05 pm - 8:25 pmSEA-BCN
15h 20m1 stop
Aer Lingus Logo
11:30 am - 6:20 pmBCN-SEA
15h 50m1 stop
$510Aer Lingus
Find Deal
Wed, Dec 10 - Wed, Dec 17

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
SEA11:45 pmSeattle/Tacoma Intl
24h 50m
2 stops
BCN9:35 amBarcelona-El Prat
Feb 24
BCN1:35 pmBarcelona-El Prat
38h 28m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$461
Find similar
United Airlines
Nov 27
SEA10:53 amSeattle/Tacoma Intl
17h 17m
1 stop
BCN1:10 pmBarcelona-El Prat
Dec 11
BCN6:50 amBarcelona-El Prat
14h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$471
Find similar
United Airlines
Dec 4
SEA8:10 amSeattle/Tacoma Intl
15h 10m
1 stop
BCN8:20 amBarcelona-El Prat
Dec 16
BCN6:50 amBarcelona-El Prat
14h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$476
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
Jan 14
SEA5:50 amSeattle/Tacoma Intl
18h 45m
2 stops
BCN9:35 amBarcelona-El Prat
Jan 25
BCN6:50 amBarcelona-El Prat
24h 16m
2 stops
SEA10:06 pmSeattle/Tacoma Intl
$472
Find similar
Air Canada
Feb 13
SEA8:10 amSeattle/Tacoma Intl
23h 10m
2 stops
BCN4:20 pmBarcelona-El Prat
Feb 20
BCN5:50 amBarcelona-El Prat
22h 26m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$499
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 October 30, 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

Fri 12/5

10:05 am-5:35 pm

2 stops22h 30m

Barcelona-El Prat

Wed 12/17

7:40 am-1:20 pm

1 stop14h 40m

$460

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 2/14

11:45 pm-9:35 am

2 stops24h 50m

Barcelona-El Prat

Tue 2/24

1:35 pm-7:03 pm

2 stops38h 28m

$461

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 1/14

5:50 am-9:35 am

2 stops18h 45m

Barcelona-El Prat

Sun 1/25

6:50 am-10:06 pm

2 stops24h 16m

$472

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 11/28

3:10 pm-5:35 pm

1 stop17h 25m

Barcelona-El Prat

Thu 12/4

6:50 am-7:16 pm

2 stops21h 26m

$477

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 12/5

2:05 pm-3:00 pm

1 stop15h 55m

Barcelona-El Prat

Sun 12/14

6:00 am-11:50 am

1 stop14h 50m

$479

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 12/3

7:20 am-8:00 am

1 stop15h 40m

Barcelona-El Prat

Sun 12/14

6:00 am-11:50 am

1 stop14h 50m

$480

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 12/10

8:05 pm-8:25 pm

1 stop15h 20m

Barcelona-El Prat

Wed 12/17

11:30 am-6:20 pm

1 stop15h 50m

$492

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Thu 2/12

2:00 pm-7:50 pm

1 stop20h 50m

Barcelona-El Prat

Sat 2/21

6:50 am-12:10 pm

1 stop14h 20m

$493

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Fri 2/13

8:10 am-4:20 pm

2 stops23h 10m

Barcelona-El Prat

Fri 2/20

5:50 am-7:16 pm

2 stops22h 26m

$499

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 12/10

8:05 pm-8:25 pm

1 stop15h 20m

Barcelona-El Prat

Wed 12/17

11:30 am-6:20 pm

1 stop15h 50m

$510

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 November. Flight prices, which tend to average around $670, 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 $673.

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 $847 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 $709 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.

Can stopping save me money on Seattle to Barcelona-El Prat Airport flights?

You could potentially save up to 6% on your flight if you consider stops on a Seattle to Barcelona-El Prat Airport flight.

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

As of October 2025, prices for Seattle to Barcelona-El Prat Airport flights are approximately 25% 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

Direct flights

None
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.
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  • 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 15m 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
562 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $465Free CancellationRating
7.4
1,545 reviews
Search Scandinavian Airlines flights
Aer LingusPriceFrom $476Free CancellationRating
7.2
1,361 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $478Free CancellationRating
7.1
10,377 reviews
Search Air Canada flights
United AirlinesPriceFrom $493Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
IberiaPriceFrom $507Free CancellationRating
7.0
3,001 reviews
Search Iberia flights
British AirwaysPriceFrom $550Free CancellationRating
6.7
7,487 reviews
Search British Airways flights
LufthansaPriceFrom $562Free CancellationRating
6.8
7,541 reviews
Search Lufthansa flights
KLMPriceFrom $574Free CancellationRating
7.7
1,406 reviews
Search KLM flights
American AirlinesPriceFrom $590Free CancellationRating
7.2
11,030 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
Badalona
Empuriabrava
Pineda de Mar
Roses
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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