$449 Cheap Flights from Washington (IAD) to Santander (SDR)

View $449 flight on Wed, Sep 24, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Santander (SDR)

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Cheap Flights from Washington to Santander (IAD-SDR)

Prices were available within the past 7 days and start at $449 for one-way flights and $529 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Wed, Sep 24 - Wed, Oct 1
IAD
Washington
SDR
Santander
$529 Roundtrip, found 1 day ago
$529
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Sep 24 from Washington to Santander, returning Wed, Oct 1, priced at $529 found 1 day ago
Iberia
Wed, Sep 24 - Wed, Oct 1
IAD
Washington
SDR
Santander
$539 Roundtrip, found 1 day ago
$539
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Sep 24 from Washington to Santander, returning Wed, Oct 1, priced at $539 found 1 day ago
British Airways
Tue, Sep 23 - Thu, Oct 9
IAD
Washington
SDR
Santander
$570 Roundtrip, found 3 days ago
$570
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Sep 23 from Washington to Santander, returning Thu, Oct 9, priced at $570 found 3 days ago
British Airways
Fri, Oct 3 - Thu, Oct 16
IAD
Washington
SDR
Santander
$620 Roundtrip, found 3 days ago
$620
Roundtrip
found 3 days ago
Select British Airways flight, departing Fri, Oct 3 from Washington to Santander, returning Thu, Oct 16, priced at $620 found 3 days ago
Iberia
Fri, Aug 22 - Tue, Aug 26
IAD
Washington
SDR
Santander
$623 Roundtrip, found 4 days ago
$623
Roundtrip
found 4 days ago
Select Iberia flight, departing Fri, Aug 22 from Washington to Santander, returning Tue, Aug 26, priced at $623 found 4 days ago
Iberia
Fri, Aug 22 - Tue, Aug 26
IAD
Washington
SDR
Santander
$632 Roundtrip, found 4 days ago
$632
Roundtrip
found 4 days ago
Select Iberia flight, departing Fri, Aug 22 from Washington to Santander, returning Tue, Aug 26, priced at $632 found 4 days ago
British Airways
Sun, Oct 19 - Thu, Nov 6
IAD
Washington
SDR
Santander
$645 Roundtrip, found 3 days ago
$645
Roundtrip
found 3 days ago
Select British Airways flight, departing Sun, Oct 19 from Washington to Santander, returning Thu, Nov 6, priced at $645 found 3 days ago
British Airways
Fri, Oct 17 - Thu, Nov 6
IAD
Washington
SDR
Santander
$711 Roundtrip, found 3 days ago
$711
Roundtrip
found 3 days ago
Select British Airways flight, departing Fri, Oct 17 from Washington to Santander, returning Thu, Nov 6, priced at $711 found 3 days ago
American Airlines
Sun, Sep 21 - Tue, Oct 7
IAD
Washington
SDR
Santander
$724 Roundtrip, found 3 days ago
$724
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sun, Sep 21 from Washington to Santander, returning Tue, Oct 7, priced at $724 found 3 days ago
Finnair
Wed, Sep 24 - Wed, Oct 1
IAD
Washington
SDR
Santander
$729 Roundtrip, found 1 day ago
$729
Roundtrip
found 1 day ago
Select Finnair flight, departing Wed, Sep 24 from Washington to Santander, returning Wed, Oct 1, priced at $729 found 1 day ago

Alternative airports near Santander

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Santander SDR. Cheapest and Closest option available. Average driving time to city center is 9 minutes. Flights from $1,064
SDR
Santander
CheapestClosest
Average driving time to city center9 min
Flights from $1,064
Flights from Washington (IAD) to Santander (SDR)
Origin airport
Washington Dulles Intl.
Destination airport
Santander
Airlines serving
Iberia
Roundtrip price
$528
Distance
3713 mi

Washington to Santander Flights

The cheapest times to fly from Washington to Santander

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Santander are during the month of September. You can find some of the cheapest flights from Washington to Santander with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Santander

Sunday is one of the best days to book for cheap flights from Washington to Santander: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Santander

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Santander in 2025. You can also book with separate airlines for your outbound and return journeys, from $449 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Santander flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Santander airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR) cost?
Grab a cheap one-way flight from $449 or cheap return flight from $529 from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR)?
September is the most affordable month to fly from IAD to SDR. Traveling outside of peak seasons is often the key to better flight prices.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from IAD to SDR. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR)?
There are no daily direct flights departing from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from IAD to SDR?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR)?
To touch down at Santander Airport (SDR) on schedule, choose a flight that takes off from Washington Dulles Intl. Airport (IAD) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR) last-minute?
Waiting until right before your break to book a flight from IAD to SDR often results in higher prices. While you may come across some last-minute deals, they're not always guaranteed. Allow some flexibility in your schedule to boost your chances of scoring a bargain.
Is it cheaper to book an IAD to SDR flight and hotel package?
You'll generally save money by securing an IAD to SDR flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your preferred flights and accommodations, consider other add-ons like car rentals, activities and tours.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Santander Airport (SDR)?
Typically, it's possible to reschedule or cancel your IAD to SDR flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.