$474 Cheap Flights from Washington (DCA) to San Sebastian (EAS)

View $474 flight on Tue, Oct 28, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to San Sebastian (EAS)

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

Prices were available within the past 7 days and start at $474 for one-way flights and $592 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Dec 2 - Thu, Dec 11
DCA
Washington
EAS
San Sebastián
$592 Roundtrip, found 3 days ago
$592
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Dec 2 from Washington to San Sebastián, returning Thu, Dec 11, priced at $592 found 3 days ago
Iberia
Mon, Sep 22 - Mon, Sep 29
DCA
Washington
EAS
San Sebastián
$592 Roundtrip, found 2 days ago
$592
Roundtrip
found 2 days ago
Select Iberia flight, departing Mon, Sep 22 from Washington to San Sebastián, returning Mon, Sep 29, priced at $592 found 2 days ago
Iberia
Tue, Dec 2 - Sun, Dec 7
DCA
Washington
EAS
San Sebastián
$631 Roundtrip, found 3 days ago
$631
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 2 from Washington to San Sebastián, returning Sun, Dec 7, priced at $631 found 3 days ago
Iberia
Tue, Dec 2 - Sun, Dec 7
DCA
Washington
EAS
San Sebastián
$642 Roundtrip, found 3 days ago
$642
Roundtrip
found 3 days ago
Select Iberia flight, departing Tue, Dec 2 from Washington to San Sebastián, returning Sun, Dec 7, priced at $642 found 3 days ago
Iberia
Mon, Sep 22 - Mon, Sep 29
DCA
Washington
EAS
San Sebastián
$667 Roundtrip, found 2 days ago
$667
Roundtrip
found 2 days ago
Select Iberia flight, departing Mon, Sep 22 from Washington to San Sebastián, returning Mon, Sep 29, priced at $667 found 2 days ago
American Airlines
Tue, Oct 28 - Mon, Nov 3
DCA
Washington
EAS
San Sebastián
$671 Roundtrip, found 6 days ago
$671
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Oct 28 from Washington to San Sebastián, returning Mon, Nov 3, priced at $671 found 6 days ago
American Airlines
Tue, Oct 28 - Mon, Nov 3
DCA
Washington
EAS
San Sebastián
$677 Roundtrip, found 6 days ago
$677
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Oct 28 from Washington to San Sebastián, returning Mon, Nov 3, priced at $677 found 6 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
DCA
Washington
EAS
San Sebastián
$682 Roundtrip, found 2 days ago
$682
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Jan 16 from Washington to San Sebastián, returning Mon, Jan 19, priced at $682 found 2 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
DCA
Washington
EAS
San Sebastián
$690 Roundtrip, found 2 days ago
$690
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Jan 16 from Washington to San Sebastián, returning Mon, Jan 19, priced at $690 found 2 days ago
British Airways
Mon, May 18 - Sun, May 24
DCA
Washington
EAS
San Sebastián
$702 Roundtrip, found 11 hours ago
$702
Roundtrip
found 11 hours ago
Select British Airways flight, departing Mon, May 18 from Washington to San Sebastián, returning Sun, May 24, priced at $702 found 11 hours ago
Flights from Washington (DCA) to San Sebastian (EAS)
Origin airport
Ronald Reagan Washington National
Destination airport
San Sebastian
Roundtrip price
$591
Distance
3793 mi

Washington to San Sebastian Flights

The cheapest times to fly from Washington to San Sebastian

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

 

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

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

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 San Sebastian in 2025. You can also book with separate airlines for your outbound and return journeys, from $474 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 San Sebastian 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 San Sebastian 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 Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS) cost?
Snag a cheap one-way flight from $474 or cheap return flight from $592 from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS)?
The cheapest month to fly from DCA to EAS is December, when demand is low. Off-peak season is generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from DCA to EAS. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS)?
You'll have to book a flight with a layover if you're traveling from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from DCA to EAS?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS)?
Select a flight from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS) that takes off before 3 PM to reduce the likelihood of delays. Departures after this time are on average 22% more likely to be canceled.**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 Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS) last-minute?
Last-minute bookings from DCA to EAS are generally more expensive. To secure the best rates, start searching for flights ahead of time. That being said, if you can play around with your travel dates, you may find a cheap ticket just before your departure.
Is it cheaper to book a DCA to EAS flight and hotel package?
Compared with arranging hotels and flights separately, booking a DCA to EAS flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place takes the hassle out of planning your trip. Simply secure your flights and select from our extensive range of stays, then customize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to San Sebastian Airport (EAS)?
It's generally possible to reschedule or cancel your DCA to EAS 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 whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.