$383 Cheap Flights from Santander (SDR) to Washington (IAD)

View $383 flight on Sat, Jan 10, 2026Opens in a new window

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

Cheap Flights from Santander to Washington (SDR-IAD)

Prices were available within the past 7 days and start at $383 for one-way flights and $643 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Tue, Dec 9 - Mon, Jan 12
SDR
Santander
IAD
Washington
$643 Roundtrip, found 3 days ago
$643
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Mon, Jan 12, priced at $643 found 3 days ago
Iberia
Tue, Dec 9 - Tue, Jan 13
SDR
Santander
IAD
Washington
$656 Roundtrip, found 3 days ago
$656
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Tue, Jan 13, priced at $656 found 3 days ago
Iberia
Tue, Dec 9 - Sun, Jan 18
SDR
Santander
IAD
Washington
$660 Roundtrip, found 3 days ago
$660
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Sun, Jan 18, priced at $660 found 3 days ago
Iberia
Tue, Dec 9 - Thu, Jan 15
SDR
Santander
IAD
Washington
$661 Roundtrip, found 3 days ago
$661
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Thu, Jan 15, priced at $661 found 3 days ago
Iberia
Tue, Dec 9 - Tue, Jan 13
SDR
Santander
IAD
Washington
$665 Roundtrip, found 3 days ago
$665
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Tue, Jan 13, priced at $665 found 3 days ago
Iberia
Tue, Dec 9 - Thu, Jan 15
SDR
Santander
IAD
Washington
$669 Roundtrip, found 3 days ago
$669
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Thu, Jan 15, priced at $669 found 3 days ago
Iberia
Tue, Dec 9 - Sun, Jan 18
SDR
Santander
IAD
Washington
$673 Roundtrip, found 3 days ago
$673
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Sun, Jan 18, priced at $673 found 3 days ago
Iberia
Tue, Dec 9 - Thu, Jan 15
SDR
Santander
IAD
Washington
$678 Roundtrip, found 3 days ago
$678
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Thu, Jan 15, priced at $678 found 3 days ago
Iberia
Tue, Dec 9 - Sun, Jan 18
SDR
Santander
IAD
Washington
$682 Roundtrip, found 3 days ago
$682
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 9 from Santander to Washington, returning Sun, Jan 18, priced at $682 found 3 days ago
Finnair
Tue, Dec 9 - Mon, Jan 12
SDR
Santander
IAD
Washington
$857 Roundtrip, found 3 days ago
$857
Roundtrip
found 3 days ago
Select Finnair flight, departing Tue, Dec 9 from Santander to Washington, returning Mon, Jan 12, priced at $857 found 3 days ago

Frequently asked questions

How much does a flight from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD) cost?
Lock in a cheap one-way flight from $383 or cheap return flight from $643 from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD)?
The cheapest month to fly from SDR to IAD is December, when demand is low. Off-peak months are typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SDR to IAD flight.
How many flights per day from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD)?
There aren't any daily direct flights departing from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from SDR to IAD?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD)?
To avoid possible delays on the Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD) route, fly before 3 PM. Later flights have a 22% higher chance of cancellation.**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 Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from SDR to IAD are usually more expensive. To secure the best rates, start searching for flights as soon as possible. That being said, if you're flexible with your travel dates, you may land a cheap ticket right before your journey.
Is it cheaper to book a SDR to IAD flight and hotel package?
You'll typically save money by securing a SDR to IAD 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 convenient place. After selecting your ideal flights and accommodations, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD)?
You can usually cancel or reschedule your SDR to IAD flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Santander
Destination airport
Washington Dulles Intl.
Roundtrip price
$642
Distance
3713 mi

Book with confidence

Santander to Washington Flights

The cheapest times to fly from Santander to Washington

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 Santander to Washington are during the month of December. You can find some of the cheapest flights from Santander to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Santander to Washington

Sunday is one of the best days to book for cheap flights from Santander to Washington: 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 Santander to Washington

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 Santander to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $383 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 Santander to Washington 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 Santander to Washington 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.

 

Santander to Washington Flights

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*Available to One Key members.