HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Sebastian

$340+ Cheap flights from Dulles Intl (IAD) to San Sebastian (EAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — EAS
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to San Sebastian with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to San Sebastian

Cheapest flights from Dulles Intl to San Sebastian
Explore the most affordable flight options available from Dulles Intl to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This Trip.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:30 pm
IAD
-
EAS
2 stops21h 20m
Multiple Airlines
Mon 3/239:30 pm
EAS
-
IAD
2 stops53h 30m
Multiple Airlines
Deal found 1/26$585
This Trip.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:35 pm
IAD
-
EAS
2 stops16h 15m
Multiple Airlines
Thu 9/101:40 pm
EAS
-
IAD
2 stops31h 25m
Multiple Airlines
Deal found 1/26$647
This American Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:00 am
IAD
-
EAS
2 stops22h 40m
American Airlines
Mon 3/239:30 pm
EAS
-
IAD
1 stop25h 00m
American Airlines
Deal found 1/26$733
This Priceline deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 pm
IAD
-
EAS
1 stop21h 50m
Iberia
Thu 9/109:20 am
EAS
-
IAD
1 stop12h 10m
Iberia
Deal found 1/26$807
This Trip.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/281:30 pm
IAD
-
EAS
2 stops37h 10m
Multiple Airlines
Tue 3/39:30 pm
EAS
-
IAD
2 stops44h 15m
Multiple Airlines
Deal found 1/27$826
This American Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:14 am
IAD
-
EAS
2 stops17h 26m
American Airlines
Thu 9/109:20 am
EAS
-
IAD
1 stop12h 10m
American Airlines
Deal found 1/26$887
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/195:00 pm
IAD
-
EAS
1 stop14h 00m
Multiple Airlines
Wed 4/229:30 pm
EAS
-
IAD
2 stops29h 05m
Multiple Airlines
Deal found 1/27$922
This American Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:06 pm
IAD
-
EAS
2 stops13h 34m
American Airlines
Mon 6/19:20 am
EAS
-
IAD
1 stop12h 10m
American Airlines
Deal found 1/26$1,182
This Priceline deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/195:00 pm
IAD
-
EAS
1 stop21h 50m
Iberia
Wed 4/229:20 am
EAS
-
IAD
1 stop12h 10m
Iberia
Deal found 1/27$1,191
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/289:18 am
IAD
-
EAS
2 stops17h 22m
American Airlines
Tue 3/39:20 am
EAS
-
IAD
1 stop13h 10m
American Airlines
Deal found 1/27$1,293

Find flight deals from Dulles Intl to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to San Sebastian (EAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 28, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$585
(Trip.com)

One-way from

$340
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$592
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Sebastián flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Sebastián flights.
Search Deals
From Washington, D.C. Dulles Intl to San Sebastián
Search Deals
One-way flight from Washington, D.C. Dulles Intl to San Sebastián
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($282 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to San Sebastian that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Sebastian that are best for you.

Fly from

Dulles Intl

Fly to

San Sebastian

Route

Depart

Return

Price

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Tue 3/10

6:30 pm-8:50 pm

2 stops21h 20m

San Sebastián

Mon 3/23

9:30 pm-10:00 pm

2 stops53h 30m

$585

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Tue 3/10

5:00 am-8:40 am

2 stops22h 40m

San Sebastián

Mon 3/23

9:30 pm-5:30 pm

1 stop25h 00m

$733

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Sat 2/28

1:30 pm-8:40 am

2 stops37h 10m

San Sebastián

Tue 3/3

9:30 pm-11:45 am

2 stops44h 15m

$826

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Sun 4/19

5:00 pm-1:00 pm

1 stop14h 00m

San Sebastián

Wed 4/22

9:30 pm-8:35 pm

2 stops29h 05m

$922

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Wed 5/27

1:06 pm-8:40 am

2 stops13h 34m

San Sebastián

Mon 6/1

9:20 am-3:30 pm

1 stop12h 10m

$1,182

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Sun 4/19

5:00 pm-8:50 pm

1 stop21h 50m

San Sebastián

Wed 4/22

9:20 am-3:30 pm

1 stop12h 10m

$1,191

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Sat 2/28

9:18 am-8:40 am

2 stops17h 22m

San Sebastián

Tue 3/3

9:20 am-4:30 pm

1 stop13h 10m

$1,293

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Wed 5/27

5:00 pm-8:50 pm

1 stop21h 50m

San Sebastián

Mon 6/1

9:30 pm-3:30 pm

1 stop24h 00m

$1,437

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Mon 3/16

8:40 pm-1:30 pm

3 stops35h 50m

$340

Washington, D.C.San Sebastian

IAD - EAS

IADEAS

Washington, D.C. Dulles Intl

Thu 7/9

10:35 pm-8:40 am

2 stops28h 05m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Compare providers for flights from Dulles Intl to San Sebastian

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to San Sebastian in January.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Sebastian flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Sebastian flight deals on Cheapflights vs. Ovago 90-95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Sebastian flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Sebastian flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-San Sebastian flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to San Sebastian

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Sebastian?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Sebastian (average of $337). Flying from Washington, D.C. Dulles Intl Airport to San Sebastian in July is currently the most expensive (average of $649). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Sebastian

Get insights into the airlines that provide service to San Sebastian. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Sebastian. Reviews last updated January 28, 2026.
See what other customers who have flown with Iberia from Washington, D.C. Dulles Intl Airport to San Sebastian have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Iberia
7.0
Good
3,099 reviews

Boarding

7.2

Food

6.4

Overall

7.0

Comfort

6.8

Crew

7.7

Entertainment

6.6

Reviews

1 / 20
2.0
Mediocre

Stiphan,Nov 2025

SVQ - MAD

Ground staff in Seville are incompetent. I fly over 300K KM per year and understand rules. Had to waste time to try to get baggage checked through for entire reservation but ground crew insisted I had to claim in Madrid. Once in Madrid, Ground staff said that it should have been checked through and did recheck the baggage. Wasted time and energy. Not level of service expected when flying business class with family and 10 suitcases. And one suitcase got lost.
Iberia
7.0
Good
3,099 reviews
Iberia
7.0
Good
3,099 reviews

Boarding

7.2

Food

6.4

Overall

7.0

Comfort

6.8

Crew

7.7

Entertainment

6.6

Reviews

1 / 20
2.0
Mediocre

Stiphan,Nov 2025

SVQ - MAD

Ground staff in Seville are incompetent. I fly over 300K KM per year and understand rules. Had to waste time to try to get baggage checked through for entire reservation but ground crew insisted I had to claim in Madrid. Once in Madrid, Ground staff said that it should have been checked through and did recheck the baggage. Wasted time and energy. Not level of service expected when flying business class with family and 10 suitcases. And one suitcase got lost.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to San Sebastian. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Sebastian from Washington, D.C. Dulles Intl?

    Located just 9.7 mi from the city center, San Sebastián is the airport most travelers will use when flying to San Sebastian from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to San Sebastián (EAS) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 1 airline.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to San Sebastian?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to San Sebastian in 22h 40m. Fly via American Airlines to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and San Sebastian is about 3807 mi.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to San Sebastian round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to San Sebastian round-trip from $561.

  • Can I find deals for flights from Dulles Intl to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to San Sebastian.

  • Can I find deals for business class flights from Dulles Intl to San Sebastian?

    Yes. Cheapflights offers flight deals from Dulles Intl to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Sebastian?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Sebastian (average of $337). Flying from Washington, D.C. Dulles Intl Airport to San Sebastian in July is currently the most expensive (average of $649). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to San Sebastian

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Bilbao flights
Reagan-National to Bilbao flights
Baltimore to Bilbao flights
Baltimore to San Sebastian flights
Reagan-National to San Sebastian flights

Top airline flying from Dulles Intl to San Sebastian

Discover the top airline that operate flights from Dulles Intl to San Sebastian. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$561Average$1,005FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2026 Cheapflights