$474 Cheap Flights from Baltimore (BWI) to San Sebastian (EAS)

View $474 flight on Mon, Sep 22, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to San Sebastian (EAS)

Cheap Flights from Baltimore to San Sebastian (BWI-EAS)

Prices were available within the past 7 days and start at $474 for one-way flights and $657 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$657 Roundtrip, found 19 hours ago
$657
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $657 found 19 hours ago
British Airways
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$665 Roundtrip, found 19 hours ago
$665
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $665 found 19 hours ago
British Airways
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$681 Roundtrip, found 19 hours ago
$681
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $681 found 19 hours ago
British Airways
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$726 Roundtrip, found 19 hours ago
$726
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $726 found 19 hours ago
British Airways
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$728 Roundtrip, found 19 hours ago
$728
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $728 found 19 hours ago
British Airways
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$744 Roundtrip, found 19 hours ago
$744
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $744 found 19 hours ago
American Airlines
Thu, Nov 6 - Wed, Nov 12
BWI
Baltimore
EAS
San Sebastián
$748 Roundtrip, found 3 days ago
$748
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Nov 6 from Baltimore to San Sebastián, returning Wed, Nov 12, priced at $748 found 3 days ago
British Airways
Sat, Nov 1 - Sat, Nov 8
BWI
Baltimore
EAS
San Sebastián
$820 Roundtrip, found 5 days ago
$820
Roundtrip
found 5 days ago
Select British Airways flight, departing Sat, Nov 1 from Baltimore to San Sebastián, returning Sat, Nov 8, priced at $820 found 5 days ago
Iberia
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$886 Roundtrip, found 19 hours ago
$886
Roundtrip
found 19 hours ago
Select Iberia flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $886 found 19 hours ago
Finnair
Thu, Jan 22 - Mon, Jan 26
BWI
Baltimore
EAS
San Sebastián
$928 Roundtrip, found 19 hours ago
$928
Roundtrip
found 19 hours ago
Select Finnair flight, departing Thu, Jan 22 from Baltimore to San Sebastián, returning Mon, Jan 26, priced at $928 found 19 hours ago
Flights from Baltimore (BWI) to San Sebastian (EAS)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
San Sebastian
Airlines serving
American Airlines, British Airways, Iberia
Roundtrip price
$657
Distance
3765 mi

Baltimore to San Sebastian Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Baltimore 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 Baltimore 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 Baltimore 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 Baltimore 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 Baltimore 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS) cost?
Lock in a cheap one-way flight from $474 or cheap return flight from $657 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS) 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS)?
Planning your trip for January is a great way to save, as it's the cheapest month for flights between BWI and EAS. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS)?
To find the cheapest airline flying from BWI to EAS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS)?
You'll need to book a flight with a layover if you're traveling from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from BWI to EAS?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on a number of 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS)?
Select a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS) last-minute?
Waiting until right before your break to book a ticket from BWI to EAS generally means paying more. While it's possible to find some last-minute offers, there's no guarantee. Keep your travel plans flexible to boost your chances of getting a bargain.
Is it cheaper to book a BWI to EAS flight and hotel package?
Securing a BWI to EAS flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our extensive range of hotels and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Sebastian Airport (EAS)?
You can usually reschedule or cancel your BWI to EAS flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.