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Cheap flights from Seattle to Barcelona from $344

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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0 bags

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Find the cheapest flights from Seattle to Barcelona

Cheap round-trip flights

Icelandair Logo
3:45 pm - 2:45 pmSEA-BCN
14h 00m1 stop
Icelandair Logo
3:45 pm - 8:40 pmBCN-SEA
13h 55m1 stop
$449Icelandair
Find Deal
Sun, Oct 12 - Wed, Oct 22
Icelandair Logo
7:00 pm - 2:45 pmSEA-BCN
34h 45m1 stop
Icelandair Logo
3:45 pm - 8:40 pmBCN-SEA
13h 55m1 stop
$451Icelandair
Find Deal
Sat, Oct 11 - Wed, Oct 22
Aer Lingus Logo
8:05 pm - 8:25 pmSEA-BCN
15h 20m1 stop
Aer Lingus Logo
11:30 am - 7:20 pmBCN-SEA
15h 50m1 stop
$483Aer Lingus
Find Deal
Wed, Mar 4 - Wed, Mar 11
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
$484Aer Lingus
Find Deal
Wed, Feb 18 - Wed, Mar 4
Iberia Logo
7:44 am - 8:50 amSEA-BCN
16h 06m1 stop
Iberia Logo
10:40 am - 11:09 pmBCN-SEA
21h 29m1 stop
$494Iberia
Find Deal
Wed, Feb 4 - Wed, Feb 25
British Airways Logo
6:50 pm - 10:30 pmSEA-BCN
18h 40m1 stop
British Airways Logo
12:30 pm - 9:50 pmBCN-SEA
18h 20m1 stop
$496British Airways
Find Deal
Mon, Dec 1 - Tue, Dec 16
British Airways Logo
10:09 am - 10:10 amSEA-BCN
15h 01m1 stop
British Airways Logo
10:45 am - 12:27 amBCN-SEA
22h 42m1 stop
$499British Airways
Find Deal
Wed, Oct 1 - Wed, Oct 8
Scandinavian Airlines Logo
10:55 am - 6:20 pmSEA-BCN
22h 25m2 stops
Scandinavian Airlines Logo
7:10 pm - 6:56 pmBCN-SEA
32h 46m2 stops
$509Scandinavian Airlines
Find Deal
Sun, Feb 1 - Fri, Feb 6
Scandinavian Airlines Logo
7:20 am - 6:20 pmSEA-BCN
26h 00m2 stops
Scandinavian Airlines Logo
7:10 pm - 10:00 pmBCN-SEA
35h 50m2 stops
$513Scandinavian Airlines
Find Deal
Sun, Nov 9 - Sun, Nov 23
Iberia Logo
7:44 am - 8:50 amSEA-BCN
16h 06m1 stop
Iberia Logo
9:45 am - 9:18 pmBCN-SEA
20h 33m2 stops
$515Iberia
Find Deal
Wed, Feb 4 - Wed, Feb 25

Aer Lingus flights from Seattle to Barcelona

Our best Aer Lingus deals on Seattle to Barcelona flight tickets
Aer Lingus
Mar 4
SEA8:05 pmSeattle/Tacoma Intl
15h 20m
1 stop
BCN8:25 pmBarcelona-El Prat
Mar 11
BCN11:30 amBarcelona-El Prat
15h 50m
1 stop
SEA7:20 pmSeattle/Tacoma Intl
$483
Find similar
Aer Lingus
Feb 18
SEA8:05 pmSeattle/Tacoma Intl
15h 20m
1 stop
BCN8:25 pmBarcelona-El Prat
Mar 4
BCN11:30 amBarcelona-El Prat
15h 50m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
$484
Find similar
Aer Lingus
Oct 13
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
$487
Find similar

Icelandair flights from Seattle to Barcelona

Our best Icelandair deals on Seattle to Barcelona flight tickets
Icelandair
Oct 12
SEA3:45 pmSeattle/Tacoma Intl
14h 00m
1 stop
BCN2:45 pmBarcelona-El Prat
Oct 22
BCN3:45 pmBarcelona-El Prat
13h 55m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$449
Find similar
Icelandair
Oct 11
SEA7:00 pmSeattle/Tacoma Intl
34h 45m
1 stop
BCN2:45 pmBarcelona-El Prat
Oct 22
BCN3:45 pmBarcelona-El Prat
13h 55m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$451
Find similar
Icelandair
Oct 11
SEA7:00 pmSeattle/Tacoma Intl
34h 45m
1 stop
BCN2:45 pmBarcelona-El Prat
Oct 24
BCN3:45 pmBarcelona-El Prat
35h 05m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$452
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 15, 2025.
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

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 10/12

3:45 pm-2:45 pm

1 stop14h 00m

Barcelona-El Prat

Wed 10/22

3:45 pm-8:40 pm

1 stop13h 55m

$449

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sat 10/11

7:00 pm-2:45 pm

1 stop34h 45m

Barcelona-El Prat

Wed 10/22

3:45 pm-8:40 pm

1 stop13h 55m

$451

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 3/4

8:05 pm-8:25 pm

1 stop15h 20m

Barcelona-El Prat

Wed 3/11

11:30 am-7:20 pm

1 stop15h 50m

$483

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 2/18

8:05 pm-8:25 pm

1 stop15h 20m

Barcelona-El Prat

Wed 3/4

11:30 am-6:20 pm

1 stop15h 50m

$484

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 2/4

7:44 am-8:50 am

1 stop16h 06m

Barcelona-El Prat

Wed 2/25

10:40 am-11:09 pm

1 stop21h 29m

$494

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Mon 12/1

6:50 pm-10:30 pm

1 stop18h 40m

Barcelona-El Prat

Tue 12/16

12:30 pm-9:50 pm

1 stop18h 20m

$496

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 10/1

10:09 am-10:10 am

1 stop15h 01m

Barcelona-El Prat

Wed 10/8

10:45 am-12:27 am

1 stop22h 42m

$499

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 2/1

10:55 am-6:20 pm

2 stops22h 25m

Barcelona-El Prat

Fri 2/6

7:10 pm-6:56 pm

2 stops32h 46m

$509

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Sun 11/9

7:20 am-6:20 pm

2 stops26h 00m

Barcelona-El Prat

Sun 11/23

7:10 pm-10:00 pm

2 stops35h 50m

$513

SeattleBarcelona

SEA - BCN

SEABCN

Seattle/Tacoma Intl

Wed 2/4

7:44 am-8:50 am

1 stop16h 06m

Barcelona-El Prat

Wed 2/25

9:45 am-9:18 pm

2 stops20h 33m

$515

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

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?

The month of November is, on average, the cheapest month to fly to Barcelona from Seattle, with most prices found around $640. If you don’t want to visit Barcelona in November, then you should wait until February to fly from Seattle, when ticket prices are also cheap, with an average price of $669.

What is the cheapest day to depart on your flight to Barcelona?

The cheapest day to depart from Seattle to Barcelona is on a Monday when prices can be found for as low as $862. On the other hand, Friday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $986.

What is the cheapest time of day to depart on your flight to Barcelona?

In the evening is the cheapest time of day to fly from Seattle to Barcelona when you can find flight prices for as low as $888. Flying to Barcelona in the evening is an ideal time because this is during off-peak travel hours. 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 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 flight route?

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

How far in advance should I book a flight to Barcelona?

You are more likely to see cheaper flights to Barcelona from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona for around $845 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona from Seattle for as low as $712 on momondo.

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

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

Cheap Seattle to Barcelona flight deals and tips

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

Direct flights

None
There are no direct flights from Seattle to Barcelona. There are no popular flight routes from Seattle to Barcelona.
Search flight deals

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

    A flight from Seattle/Tacoma Intl to Barcelona will travel around 5410.7 mi. A reasonable flight in good conditions will take 13h 00m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Barcelona are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Barcelona.

  • What documentation or ID do you need to fly to Barcelona?

    The required travel and health documents for your Barcelona trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Barcelona. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Seattle to Barcelona

Compare and see reviews for airlines that fly from Seattle to Barcelona with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $390Free CancellationRating
7.0
544 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $465Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $478Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Aer LingusPriceFrom $498Free CancellationRating
7.2
1,270 reviews
Search Aer Lingus flights
IberiaPriceFrom $507Free CancellationRating
7.0
2,924 reviews
Search Iberia flights
United AirlinesPriceFrom $548Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
British AirwaysPriceFrom $553Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
KLMPriceFrom $574Free CancellationRating
7.8
1,385 reviews
Search KLM flights
LufthansaPriceFrom $581Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
American AirlinesPriceFrom $587Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Barcelona from Seattle.

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

All flight searches from Seattle to Barcelona on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Seattle to Barcelona flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Seattle to Barcelona now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Barcelona and let you know when they change.

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Find better results for your trip to Spain

Fly into one of these airports located in Barcelona

Airports listed have a maximum distance of 46.7 mi from Barcelona
Barcelona-El Prat Airport
Girona Costa Brava Airport