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Cheap flights from Barcelona-El Prat Airport to Seattle from $365

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Barcelona-El Prat Airport to Seattle departing on 1/31. 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 Barcelona-El Prat Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:30 am - 5:00 pmBCN-SEA
42h 30m2 stops
Multiple Airlines Logo
2:35 pm - 8:10 pmSEA-BCN
20h 35m2 stops
$680Multiple Airlines
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Tue, Dec 2 - Tue, Dec 9
Lufthansa Logo
6:50 am - 1:10 pmBCN-SEA
14h 20m1 stop
Lufthansa Logo
4:10 pm - 11:05 pmSEA-BCN
22h 55m1 stop
$760Lufthansa
Find Deal
Mon, Mar 9 - Fri, Mar 20
United Airlines Logo
6:50 am - 12:10 pmBCN-SEA
14h 20m1 stop
United Airlines Logo
7:00 am - 9:00 amSEA-BCN
17h 00m1 stop
$768United Airlines
Find Deal
Sat, Jan 31 - Tue, Feb 10
United Airlines Logo
6:50 am - 12:10 pmBCN-SEA
14h 20m1 stop
United Airlines Logo
7:00 am - 9:00 amSEA-BCN
17h 00m1 stop
$769United Airlines
Find Deal
Sat, Jan 31 - Tue, Feb 10
Multiple Airlines Logo
6:00 am - 11:50 amBCN-SEA
14h 50m1 stop
Multiple Airlines Logo
1:30 pm - 3:00 pmSEA-BCN
16h 30m2 stops
$774Multiple Airlines
Find Deal
Sat, Jan 31 - Tue, Feb 10
Air Canada Logo
6:50 am - 10:16 pmBCN-SEA
23h 26m2 stops
Air Canada Logo
8:10 am - 8:35 amSEA-BCN
40h 25m2 stops
$779Air Canada
Find Deal
Mon, Mar 9 - Fri, Mar 20
Air Canada Logo
1:35 pm - 7:16 pmBCN-SEA
38h 41m2 stops
Air Canada Logo
5:50 am - 9:35 amSEA-BCN
18h 45m2 stops
$798Air Canada
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Mon, Nov 17 - Wed, Dec 3
Delta Logo
6:00 am - 11:50 amBCN-SEA
14h 50m1 stop
Delta Logo
8:15 am - 8:40 amSEA-BCN
15h 25m1 stop
$820Delta
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Tue, Dec 16 - Tue, Dec 23
Delta Logo
6:20 am - 2:45 pmBCN-SEA
17h 25m2 stops
Delta Logo
6:30 pm - 5:10 pmSEA-BCN
13h 40m1 stop
$821Delta
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Fri, May 1 - Sat, May 9
KLM Logo
6:00 am - 2:59 pmBCN-SEA
17h 59m2 stops
KLM Logo
3:05 pm - 10:25 amSEA-BCN
34h 20m1 stop
$835KLM
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Wed, Dec 17 - Wed, Dec 24

Aer Lingus flights from Barcelona-El Prat Airport to Seattle

Our best Aer Lingus deals on Barcelona-El Prat Airport to Seattle flight tickets
Aer Lingus
Dec 7
BCN11:30 amBarcelona-El Prat
15h 50m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
Dec 22
SEA8:05 pmSeattle/Tacoma Intl
15h 20m
1 stop
BCN8:25 pmBarcelona-El Prat
$787
Find similar
Aer Lingus
Nov 13
BCN9:05 pmBarcelona-El Prat
35h 13m
2 stops
SEA11:18 pmSeattle/Tacoma Intl
Dec 11
SEA12:38 amSeattle/Tacoma Intl
25h 12m
2 stops
BCN10:50 amBarcelona-El Prat
$1,103
Find similar
Aer Lingus
Nov 10
BCN11:30 amBarcelona-El Prat
15h 50m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
Nov 22
SEA12:59 amSeattle/Tacoma Intl
24h 51m
2 stops
BCN10:50 amBarcelona-El Prat
$1,139
Find similar

United Airlines flights from Barcelona-El Prat Airport to Seattle

Our best United Airlines deals on Barcelona-El Prat Airport to Seattle flight tickets
United Airlines
Jan 31
BCN6:50 amBarcelona-El Prat
14h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
Feb 10
SEA7:00 amSeattle/Tacoma Intl
17h 00m
1 stop
BCN9:00 amBarcelona-El Prat
$768
Find similar
United Airlines
Jan 31
BCN6:50 amBarcelona-El Prat
14h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
Feb 10
SEA7:00 amSeattle/Tacoma Intl
17h 00m
1 stop
BCN9:00 amBarcelona-El Prat
$769
Find similar
United Airlines
Nov 24
BCN6:50 amBarcelona-El Prat
14h 20m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
Dec 10
SEA11:50 pmSeattle/Tacoma Intl
24h 10m
1 stop
BCN9:00 amBarcelona-El Prat
$809
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Barcelona-El Prat Airport to Seattle 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 3, 2025.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Tue 12/2

7:30 am-5:00 pm

2 stops42h 30m

Seattle/Tacoma Intl

Tue 12/9

2:35 pm-8:10 pm

2 stops20h 35m

$680

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 3/9

6:50 am-1:10 pm

1 stop14h 20m

Seattle/Tacoma Intl

Fri 3/20

4:10 pm-11:05 pm

1 stop22h 55m

$760

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Sat 1/31

6:50 am-12:10 pm

1 stop14h 20m

Seattle/Tacoma Intl

Tue 2/10

7:00 am-9:00 am

1 stop17h 00m

$768

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Sat 1/31

6:50 am-12:10 pm

1 stop14h 20m

Seattle/Tacoma Intl

Tue 2/10

7:00 am-9:00 am

1 stop17h 00m

$769

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Sat 1/31

6:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

Tue 2/10

1:30 pm-3:00 pm

2 stops16h 30m

$774

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 3/9

6:50 am-10:16 pm

2 stops23h 26m

Seattle/Tacoma Intl

Fri 3/20

8:10 am-8:35 am

2 stops40h 25m

$779

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Mon 11/17

1:35 pm-7:16 pm

2 stops38h 41m

Seattle/Tacoma Intl

Wed 12/3

5:50 am-9:35 am

2 stops18h 45m

$798

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Tue 12/16

6:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

Tue 12/23

8:15 am-8:40 am

1 stop15h 25m

$820

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Fri 5/1

6:20 am-2:45 pm

2 stops17h 25m

Seattle/Tacoma Intl

Sat 5/9

6:30 pm-5:10 pm

1 stop13h 40m

$821

BarcelonaSeattle

BCN - SEA

BCNSEA

Barcelona-El Prat

Wed 12/17

6:00 am-2:59 pm

2 stops17h 59m

Seattle/Tacoma Intl

Wed 12/24

3:05 pm-10:25 am

1 stop34h 20m

$835

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 Seattle from

How to get the cheapest flight ticket from Barcelona-El Prat Airport to Seattle

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 Seattle?

In general, March is the cheapest month to fly from Barcelona-El Prat Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $708. If you don’t want to visit Seattle in March, then you should wait until May to fly from Barcelona-El Prat Airport, when ticket prices are also cheap, with an average price of $729.

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

On average, the least expensive day to fly to Seattle from Barcelona-El Prat Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $784. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Barcelona-El Prat Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,377.

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

Flying to Seattle from Barcelona-El Prat Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as $877 when looking at flights departing in the morning. Flights to Seattle are more costly at noon, with an average ticket price of $1,226. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Seattle from Barcelona-El Prat Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $873 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Barcelona-El Prat Airport for as low as $810 on momondo.

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

There are 2 cabin classes available to choose from on Barcelona-El Prat to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of November 2025, prices for Barcelona-El Prat Airport to Seattle flights are approximately 24% more expensive when compared to flights at the same time last year.

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

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

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

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

Direct flights

None
There are no direct flights from Barcelona-El Prat Airport to Seattle. There are no popular flight routes from Barcelona-El Prat Airport to Seattle.
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  • How far is Barcelona-El Prat to Seattle/Tacoma Intl by plane?

    A flight from Barcelona-El Prat to Seattle/Tacoma Intl will travel around 5412.9 mi. By plane, this route typically takes 13h 45m.

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

    Prices for flights from Barcelona-El Prat Airport to Seattle/Tacoma Intl Airport were last updated today.

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

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

    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 Barcelona-El Prat Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

Best airlines flying from Barcelona-El Prat Airport to Seattle

Compare and see reviews for airlines that fly from Barcelona-El Prat Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $677Free CancellationRating
7.7
1,405 reviews
Search KLM flights
DeltaPriceFrom $686Free CancellationRating
7.9
8,002 reviews
Search Delta flights
LufthansaPriceFrom $712Free CancellationRating
6.8
7,545 reviews
Search Lufthansa flights
British AirwaysPriceFrom $768Free CancellationRating
6.7
7,494 reviews
Search British Airways flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Puyallup
Marysville
Redmond
Tukwila
Federal Way
Lakewood
Cle Elum
Fife
Centralia
Kirkland
Shoreline
Westport

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Barcelona to Seattle. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Seattle from Barcelona on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Barcelona to Seattle 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 Barcelona to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from Barcelona. 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.

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