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San Sebastian

$978+ Cheap flights from Denver (DEN) to San Sebastian (EAS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — EAS
nov. 27 — dic. 41
jue. 11/27
jue. 12/4
1 adult, Economy
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Cheap flight deals from Denver to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) 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 octubre 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$978
(Expedia)
Provider with most accurate pricing for Denver Intl-San Sebastián flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-San Sebastián flights.
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From Denver Intl to San Sebastián
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Find flight deals from Denver to San Sebastian

Cheapest flights from Denver to San Sebastian
Explore the most affordable flight options available from Denver to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 28, 2025.

This American Airlines deal was found by Cheapflights users on 10/25. 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.
vie. 11/77:22 amDEN - EAS
2 stops21h 38mAmerican Airlines
mar. 11/111:40 pmEAS - DEN
2 stops40h 42mAmerican Airlines
Deal found 10/25$1,591

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 octubre 28, 2025.
Use the filters below to find and compare flights from Denver to San Sebastian that are best for you.

Fly from

Denver

Fly to

San Sebastian

Route

Depart

Return

Price

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

vie. 1/9

5:25 pm-8:50 pm

2 stops19h 25m

San Sebastián

mié. 7/8

9:30 pm-10:27 pm

2 stops32h 57m

$978

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

vie. 1/9

5:25 pm-8:50 pm

2 stops19h 25m

San Sebastián

mié. 7/8

9:30 pm-4:35 pm

2 stops27h 05m

$1,003

DenverSan Sebastian

DEN - EAS

DENEAS

Denver Intl

vie. 11/7

7:22 am-1:00 pm

2 stops21h 38m

San Sebastián

mar. 11/11

1:40 pm-10:22 pm

2 stops40h 42m

$1,591

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Compare providers for flights from Denver 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 Denver to San Sebastian in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 Denver-San Sebastian flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-San Sebastian flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Denver-San Sebastian flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-San Sebastian flights, Cheapflights users trust eDreams the most. eDreams 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 Denver-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 Denver to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Denver 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 Denver to San Sebastian

What is the cheapest month to book a flight from Denver to San Sebastian?

Currently, February is the cheapest month in which you can book a flight from Denver to San Sebastian (average of $530). Flying from Denver to San Sebastian in December is currently the most expensive (average of $1,244). 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.

What is the cheapest time of day to fly from DEN to EAS?

Find hourly flight availability from Denver to San Sebastian. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 28, 2025.

One of the essential ways to save on airfare from Denver to San Sebastian is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 40% on airfare.

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 octubre 28, 2025.
See what other customers who have flown with Iberia from Denver 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
3,001 reviews

Boarding

7.1

Comfort

6.7

Crew

7.7

Entertainment

6.6

Overall

7.0

Food

6.3

Reviews

1 / 20
6.0
Good

David,May 2025

JFK - MAD

Unfortunately carry on bag over head was full. I was seated 27J and had to place my carry on by seat 8 .. other then that it was a good flight
Iberia
7.0
Good
3,001 reviews
Iberia
7.0
Good
3,001 reviews

Boarding

7.1

Comfort

6.7

Crew

7.7

Entertainment

6.6

Overall

7.0

Food

6.3

Reviews

1 / 20
6.0
Good

David,May 2025

JFK - MAD

Unfortunately carry on bag over head was full. I was seated 27J and had to place my carry on by seat 8 .. other then that it was a good flight

Related info for your journey

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

  • How long is the flight from Denver to San Sebastian?

    For as low as $978, Iberia can have you in San Sebastian from Denver in 19h 25m. Denver and San Sebastian are separated by a distance of 4944 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Denver to San Sebastian round-trip?

    Currently priced at $873, Iberia will fly you from Denver to San Sebastian and back. In addition to Iberia, many other airlines offer competitively priced options for your trip.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver 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 Denver to San Sebastian?

    Currently, February is the cheapest month in which you can book a flight from Denver to San Sebastian (average of $530). Flying from Denver to San Sebastian in December is currently the most expensive (average of $1,244). 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.

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Top airline flying from Denver to San Sebastian

Discover the top airline that operate flights from Denver 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 octubre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$873Average$1,467FlexibilityNo cancel feeOn-time77%

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