DEN - EAS

$891 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 11/14. 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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Flight 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

Fri, Nov 14 - Tue, Nov 18
American Airlines Logo
7:22 am - 1:00 pmDEN-EAS
21h 38m2 stops
American Airlines Logo
1:40 pm - 10:09 pmEAS-DEN
40h 29m2 stops
$891American Airlines
Find Deal
Fri, Nov 14 - Tue, Nov 18
American Airlines Logo
12:27 pm - 8:50 pmDEN-EAS
24h 23m2 stops
American Airlines Logo
1:40 pm - 10:09 pmEAS-DEN
40h 29m2 stops
$892American Airlines
Find Deal
Thu, Nov 13 - Tue, Nov 18
American Airlines Logo
12:18 am - 8:50 pmDEN-EAS
36h 32m2 stops
American Airlines Logo
1:40 pm - 10:09 pmEAS-DEN
40h 29m2 stops
$990American Airlines
Find Deal
Thu, Nov 13 - Tue, Nov 18
American Airlines Logo
12:18 am - 8:50 pmDEN-EAS
36h 32m2 stops
American Airlines Logo
1:40 pm - 10:09 pmEAS-DEN
40h 29m2 stops
$991American Airlines
Find Deal
Useful Info

Good to know

Cheapest flight$891
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 $891 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 2909 reviews
7.6Crew
6.3Food
6.7Comfort
6.6Entertainment
7.1Boarding
Airline reviews

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

8.0 ExcellentSteven, Aug 2025BOS - MAD
Read more Iberia reviews

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

Boarding an international flight via several sets of stairs and shuttle busses to the tarmac even when multiple jet-bridges were empty at Madrid airport (the hub for Iberia) was not pleasant. I was fine, but a lot of elderly folks and families with kids were struggling. A bad way to start a flight. Business class seats were nice, although not cleaned well from the prior flight.

This was a short flight. We sat in business class so we we were served a warm meal, which was nice. The flight attendants were very attentive, professional, and kind.

The flight was great; I don't see any area of improvement.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

Delayed first flight Geneva Madrid.. We didn’t miss our 2nd flight only because the 2nd flight Madrid Dallas was 1h delayed. However we did end up missing the 3rd leg Dallas Austin. Luggage didn’t show up in Dallas. So we re missing 2 suit cases. Customer service sent us to a hotel in Dallas. Only one room booked for 5!! Pretty bad experience overall. I won’t book a flight on Iberia in the future

Crew was excellent, great customer service, checked luggage took 1 hour and a half to come out at the baggage claim, the only negative thing about the flight.

Horrible experience airline crew was unprofessional. Flight was delayed. Suit cases did not arrive. Never flying iberia again

People point to America as the model of late stage capitalism. My friends, airlines in america at least give you WiFi, and they haven’t quite smashed people into cardboard tv dinner trays yet. Iberia has mastered the tv dinner seat and WiFi is 20 euros. Be serious yall.

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

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

Information on your arrival and departure airports

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