$417 Cheap Flights from San Sebastian (EAS) to Washington (IAD)

View $417 flight on Sun, Feb 22, 2026Opens in a new window

Popular airlines from San Sebastian (EAS) to Washington Dulles Intl. Airport (IAD)

Cheap Flights from San Sebastian to Washington (EAS-IAD)

Prices were available within the past 7 days and start at $417 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $417 or cheap return flight from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD) 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 San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD)?
Planning your trip for can help you save, as it's the cheapest month for flights between EAS and IAD. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from EAS to IAD. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD)?
Direct flights from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from EAS to IAD?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD)?
Opt for a flight from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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 San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from EAS to IAD are generally more expensive. For the lowest prices, start searching for flights as early as possible. That being said, if your travel plans are flexible, it's possible to find a cheap ticket right before you leave.
Is it cheaper to book an EAS to IAD flight and hotel package?
Booking an EAS to IAD flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our wide range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Sebastian Airport (EAS) to Washington Dulles Intl. Airport (IAD)?
In most instances, you can modify or cancel your EAS to IAD flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you want further information, go to our Customer Service portal.

Travel information

Origin airport
San Sebastian
Destination airport
Washington Dulles Intl.
Distance
3808 mi

Book with confidence

San Sebastian to Washington Flights

The cheapest times to fly from San Sebastian 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 San Sebastian to Washington are during the month of . You can find some of the cheapest flights from San Sebastian to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Sebastian to Washington

Sunday is one of the best days to book for cheap flights from San Sebastian 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 San Sebastian 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 San Sebastian to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $417 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 San Sebastian 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 San Sebastian 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.

 

San Sebastian to Washington Flights

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*Available to One Key members.