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Santander

$995+ Cheap flights from Seattle (SEA) to Santander (SDR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDR
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from Seattle to Santander

Cheapest flights from Seattle to Santander
Explore the most affordable flight options available from Seattle to Santander. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:55 pm
SEA
-
SDR
2 stops29h 35m
Iberia
Sat 8/159:35 pm
SDR
-
SEA
2 stops28h 35m
Iberia
Deal found 1/27$995
This Iberia deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/48:35 am
SEA
-
SDR
2 stops38h 45m
Iberia
Sun 2/89:25 am
SDR
-
SEA
2 stops21h 55m
Iberia
Deal found 1/26$1,029
This Cheapflightsfares deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/41:54 pm
SEA
-
SDR
2 stops18h 06m
Iberia
Mon 4/2010:05 am
SDR
-
SEA
2 stops20h 18m
Iberia
Deal found 1/27$1,772
This Cheapflightsfares deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/171:58 pm
SEA
-
SDR
2 stops18h 02m
Iberia
Tue 6/2310:10 am
SDR
-
SEA
2 stops17h 15m
Iberia
Deal found 1/27$4,704

Find flight deals from Seattle to Santander

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Santander (SDR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 28, 2026.

Most accurate provider

AranGrant
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$1,772
(Cheapflightsfares)

One-way from

$1,252
(Cheapflightsfares)
Provider with most accurate pricing for Seattle/Tacoma Intl-Santander flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Santander flights.
Search Deals
From Seattle/Tacoma Intl to Santander
Search Deals
One-way flight from Seattle/Tacoma Intl to Santander
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Santander 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, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
Use the filters below to find and compare flights from Seattle to Santander that are best for you.

Fly from

Seattle

Fly to

Santander

Route

Depart

Return

Price

SeattleSantander

SEA - SDR

SEASDR

Seattle/Tacoma Intl

Sat 4/4

1:54 pm-5:00 pm

2 stops18h 06m

Santander

Mon 4/20

10:05 am-9:23 pm

2 stops20h 18m

$1,772

SeattleSantander

SEA - SDR

SEASDR

Seattle/Tacoma Intl

Wed 6/17

1:58 pm-5:00 pm

2 stops18h 02m

Santander

Tue 6/23

10:10 am-6:25 pm

2 stops17h 15m

$4,704

SeattleSantander

SEA - SDR

SEASDR

Seattle/Tacoma Intl

Fri 5/22

1:58 pm-5:00 pm

2 stops18h 02m

$1,252

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Compare providers for flights from Seattle to Santander

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Santander in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Santander flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Santander flight deals on Cheapflights vs. AranGrant 90-95% of the time. Price accuracy is based on data collected from Seattle-Santander flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Santander flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Santander flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Santander

Have a flexible travel schedule? Discover the best time to fly to Santander from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Santander

What is the cheapest month to book a flight from Seattle to Santander?

Currently, January is the cheapest month in which you can book a flight from Seattle to Santander (average of $484). Flying from Seattle to Santander in June is currently the most expensive (average of $1,288). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Santander. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Santander?

    Iberia can get you from Seattle to Santander in just under 18h 06m. Your travel time can differ by up to . The distance between Seattle and Santander is about 5124 mi.

  • Can I find deals for flights from Seattle to Santander that include hotel bookings?

    Yes. In addition to deals on Seattle to Santander flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Santander?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Santander.

  • Can I find deals for business class flights from Seattle to Santander?

    Yes. Cheapflights offers flight deals from Seattle to Santander by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Santander?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Santander (average of $484). Flying from Seattle to Santander in June is currently the most expensive (average of $1,288). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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