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Santander

$1,001+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDR
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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1. Tell us where you want to go

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Cheap 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 October 29, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$1,001
(Iberia)
Provider with most accurate pricing for Seattle/Tacoma Intl-Santander flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Santander flights.
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From Seattle/Tacoma Intl to Santander
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Find 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 October 29, 2025.

This Ovago deal was found by Cheapflights users on 10/26. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:23 amSEA - SDR
2 stops37h 27mMultiple Airlines
Fri 11/76:30 amSDR - SEA
2 stops25h 55mMultiple Airlines
Deal found 10/26$1,420
This Iberia deal was found by Cheapflights users on 10/28. 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.
Thu 11/206:50 pmSEA - SDR
2 stops29h 00mIberia
Thu 11/279:00 amSDR - SEA
2 stops35h 30mIberia
Deal found 10/28$1,868
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:07 pmSEA - SDR
2 stops25h 43mMultiple Airlines
Thu 11/276:30 amSDR - SEA
3 stops19h 25mMultiple Airlines
Deal found 10/28$2,775

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 October 29, 2025.
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

Wed 3/11

7:50 pm-5:10 pm

2 stops37h 20m

Santander

Sun 3/15

5:40 pm-12:30 pm

2 stops50h 50m

$1,001

SeattleSantander

SEA - SDR

SEASDR

Seattle/Tacoma Intl

Wed 3/18

7:55 am-8:20 am

2 stops16h 25m

Santander

Wed 3/25

9:00 am-5:55 pm

2 stops16h 55m

$1,397

SeattleSantander

SEA - SDR

SEASDR

Seattle/Tacoma Intl

Thu 11/20

6:50 pm-8:50 am

2 stops29h 00m

Santander

Thu 11/27

9:00 am-11:30 am

2 stops35h 30m

$1,868

SeattleSantander

SEA - SDR

SEASDR

Seattle/Tacoma Intl

Thu 11/20

10:07 pm-8:50 am

2 stops25h 43m

Santander

Thu 11/27

6:30 am-4:55 pm

3 stops19h 25m

$2,775

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 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 Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Seattle-Santander flight deals on Cheapflights vs. Expedia 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, October is the cheapest month in which you can book a flight from Seattle to Santander (average of $505). 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 37h 20m. 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, October is the cheapest month in which you can book a flight from Seattle to Santander (average of $505). 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.

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