DEN - EAS

$856 Find Cheap Flights from Denver to San Sebastian

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to San Sebastian departing on 9/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to San Sebastian

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to San Sebastian, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to San Sebastian, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Denver to San Sebastian (DEN-EAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to San Sebastian that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to San Sebastian

Tue, Sep 30 - Fri, Oct 10
American Airlines Logo
7:16 am - 1:00 pmDEN-EAS
21h 44m2 stops
American Airlines Logo
1:40 pm - 11:41 pmEAS-DEN
18h 01m2 stops
$856American Airlines
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Fri, Nov 14 - Tue, Nov 18
American Airlines Logo
7:26 am - 8:50 pmDEN-EAS
29h 24m2 stops
American Airlines Logo
1:40 pm - 11:22 pmEAS-DEN
41h 42m2 stops
$942American Airlines
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Fri, Nov 14 - Tue, Nov 18
British Airways Logo
5:25 pm - 8:50 pmDEN-EAS
19h 25m2 stops
British Airways Logo
1:40 pm - 3:30 pmEAS-DEN
33h 50m2 stops
$976British Airways
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Thu, Aug 28 - Sat, Sep 13
Iberia Logo
10:35 am - 8:40 amDEN-EAS
38h 05m2 stops
Iberia Logo
9:30 pm - 8:53 amEAS-DEN
43h 23m2 stops
$1,098Iberia
Find Deal
Thu, Aug 28 - Sat, Sep 13
Iberia Logo
7:22 am - 8:40 amDEN-EAS
17h 18m3 stops
Iberia Logo
9:30 pm - 5:59 pmEAS-DEN
28h 29m2 stops
$1,366Iberia
Find Deal
Useful Info

KAYAK's insights & trends for Denver to San Sebastian flights

Get data-powered insights and trends into flights from Denver to San Sebastian to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Denver to San Sebastian?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Denver to San Sebastian were found on American Airlines ($856) and British Airways ($976).

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Good to know

Cheapest flight$856
Flight from Denver to San Sebastian

When to book flights from Denver to San Sebastian

Are your dates flexible? Find out the best times to travel from Denver to San Sebastian based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to San Sebastian

  • What is the cheapest flight from Denver to San Sebastian?

    In the last 3 days, the lowest price for a flight from Denver to San Sebastian was $856 for a round-trip ticket.

  • Do I need a passport to fly between Denver and San Sebastian?

    Yes, you’ll need a passport to travel to San Sebastian from Denver.

  • Which airports will I be using when flying from Denver to San Sebastian?

    On your way to San Sebastian, you’ll fly out from Denver Intl. You’ll be landing at San Sebastián.

  • Which aircraft models fly most regularly from Denver to San Sebastian?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to San Sebastian?

    oneworld is the only airline alliance operating flights between Denver and San Sebastian.

  • How does KAYAK find such low prices on flights from Denver to San Sebastian?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to San Sebastian.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to San Sebastian?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to San Sebastian?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Sebastian with an airline and back to Denver with another airline. Booking your flights between Denver and EAS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to San Sebastian?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Sebastian from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Denver to San Sebastian

 
See real verified KAYAK customer reviews for airlines flying from Denver to San Sebastian. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to San Sebastian? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
IberiaOverall score based on 2834 reviews
6.3Food
6.6Entertainment
7.6Crew
6.7Comfort
7.1Boarding
Airline reviews

Delayed and missed connections on leaving the states and returning Planes were old and small- very uncomfortable. Meals were good but very infrequent service for even water/drinks. No explanations for 3+ hour delay

2.0 MediocreJody, Jul 2025SPC - MAD
Read more Iberia reviews

Delayed and missed connections on leaving the states and returning Planes were old and small- very uncomfortable. Meals were good but very infrequent service for even water/drinks. No explanations for 3+ hour delay

Boarding on the buses isn’t efficient. Overall, it was great.

BEWARE!!! Iberia changes your seats at random. I paid for a window seat and they changed it to one in the middle aisle resting against the bathroom- can’t lean back + hear every flush. This on a 11 hour flight.. There were families that were broken up with separate seats all over the plane. Lots of upset passengers showing their seat confirmation to the besieged and helpless airline steward. Also, the gluten free meal was tasteless.

Iberia airlines was late on every flight I had. It was very difficult to communicate in English with iberia airlines and airport employees.

ground crew and check-in was pathetic - insisted on charging me for luggage even though the ticket said it was already included. They also accidentally sent my luggage through without a luggage tag and had to retrieve it. Generally, it was like a bad movie.

The app on phone and the online check in is not good, it would not give me the option of Spain or Madrid City in the drop down menu and I couldn't move forward with online check in.

Well my luggage was damaged and they lost the plastic cover. I need to file a claim and I would like for someone to follow up with me on this. Thanks.

Bag misplaced. Iberia claims bag has been forwarded. But AirTag shows that the bag is still in Madrid.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

Service and food were excellent, could have been more info in English.

Everything you need to know for your flight from Denver to San Sebastian

Information on your arrival and departure airports

Denver (DEN)
San Sebastian (EAS)

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