$719 Cheap Flights from Santander (SDR) to Washington (IAD)

View $719 flight on Wed, Oct 1, 2025Opens in a new window

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

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Cheap Flights from Santander to Washington (SDR-IAD)

Prices were available within the past 7 days and start at $719 for one-way flights and $1,386 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$1,386 Roundtrip, found 4 days ago
$1,386
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $1,386 found 4 days ago
Finnair
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$1,410 Roundtrip, found 4 days ago
$1,410
Roundtrip
found 4 days ago
Select Finnair flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $1,410 found 4 days ago
Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$1,930 Roundtrip, found 4 days ago
$1,930
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $1,930 found 4 days ago
Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$3,470 Roundtrip, found 4 days ago
$3,470
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $3,470 found 4 days ago
Finnair
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$4,072 Roundtrip, found 4 days ago
$4,072
Roundtrip
found 4 days ago
Select Finnair flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $4,072 found 4 days ago
Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$4,207 Roundtrip, found 4 days ago
$4,207
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $4,207 found 4 days ago
Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$4,770 Roundtrip, found 4 days ago
$4,770
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $4,770 found 4 days ago
Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$6,131 Roundtrip, found 4 days ago
$6,131
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $6,131 found 4 days ago
Iberia
Tue, Jul 8 - Sun, Jul 13
SDR
Santander
IAD
Washington
$6,886 Roundtrip, found 4 days ago
$6,886
Roundtrip
found 4 days ago
Select Iberia flight, departing Tue, Jul 8 from Santander to Washington, returning Sun, Jul 13, priced at $6,886 found 4 days ago
Flights from Santander (SDR) to Washington (IAD)
Origin airport
Santander
Destination airport
Washington Dulles Intl.
Roundtrip price
$1,386
Distance
3713 mi

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 July. 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 $719 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.

 

Frequently asked questions

How much does a flight from Santander Airport (SDR) to Washington Dulles Intl. Airport (IAD) cost?
Discover the latest flight deals from SDR to IAD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SDR to IAD?
The cheapest flights from SDR to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SDR to IAD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SDR to IAD. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.

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*Available to One Key members.