$445 Cheap Flights from Washington (IAD) to Santander (SDR)

View $445 flight on Mon, Jan 26, 2026Opens in a new window

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

Cheap Flights from Washington to Santander (IAD-SDR)

Prices were available within the past 7 days and start at $445 for one-way flights and $651 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sun, May 17 - Thu, Jun 4
IAD
Washington
SDR
Santander
$651 Roundtrip, found 6 days ago
$651
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, May 17 from Washington to Santander, returning Thu, Jun 4, priced at $651 found 6 days ago
British Airways
Sun, Apr 26 - Sat, May 9
IAD
Washington
SDR
Santander
$677 Roundtrip, found 6 days ago
$677
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Apr 26 from Washington to Santander, returning Sat, May 9, priced at $677 found 6 days ago
British Airways
Sun, Apr 19 - Fri, May 8
IAD
Washington
SDR
Santander
$683 Roundtrip, found 6 days ago
$683
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Apr 19 from Washington to Santander, returning Fri, May 8, priced at $683 found 6 days ago
British Airways
Mon, May 25 - Thu, Jun 11
IAD
Washington
SDR
Santander
$693 Roundtrip, found 6 days ago
$693
Roundtrip
found 6 days ago
Select British Airways flight, departing Mon, May 25 from Washington to Santander, returning Thu, Jun 11, priced at $693 found 6 days ago
British Airways
Sun, May 24 - Thu, Jun 11
IAD
Washington
SDR
Santander
$716 Roundtrip, found 6 days ago
$716
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, May 24 from Washington to Santander, returning Thu, Jun 11, priced at $716 found 6 days ago
Iberia
Sat, Jun 20 - Fri, Jul 10
IAD
Washington
SDR
Santander
$1,100 Roundtrip, found 5 hours ago
$1,100
Roundtrip
found 5 hours ago
Select Iberia flight, departing Sat, Jun 20 from Washington to Santander, returning Fri, Jul 10, priced at $1,100 found 5 hours ago
Iberia
Sat, Jun 20 - Fri, Jul 10
IAD
Washington
SDR
Santander
$1,108 Roundtrip, found 5 hours ago
$1,108
Roundtrip
found 5 hours ago
Select Iberia flight, departing Sat, Jun 20 from Washington to Santander, returning Fri, Jul 10, priced at $1,108 found 5 hours ago
Iberia
Sat, Jun 20 - Fri, Jul 10
IAD
Washington
SDR
Santander
$1,172 Roundtrip, found 5 hours ago
$1,172
Roundtrip
found 5 hours ago
Select Iberia flight, departing Sat, Jun 20 from Washington to Santander, returning Fri, Jul 10, priced at $1,172 found 5 hours ago
Iberia
Sat, Jun 20 - Fri, Jul 10
IAD
Washington
SDR
Santander
$1,180 Roundtrip, found 5 hours ago
$1,180
Roundtrip
found 5 hours ago
Select Iberia flight, departing Sat, Jun 20 from Washington to Santander, returning Fri, Jul 10, priced at $1,180 found 5 hours ago
Finnair
Sat, Jun 20 - Fri, Jul 10
IAD
Washington
SDR
Santander
$1,300 Roundtrip, found 5 hours ago
$1,300
Roundtrip
found 5 hours ago
Select Finnair flight, departing Sat, Jun 20 from Washington to Santander, returning Fri, Jul 10, priced at $1,300 found 5 hours ago

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 $445 or cheap return flight from $651 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)?
May 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.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Santander
Airlines serving
Iberia
Roundtrip price
$650
Distance
3713 mi

Book with confidence

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 May. 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 $445 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.

 

Washington to Santander Flights

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*Available to One Key members.