DEN - EAS

$370 Find Cheap Flights from Denver to San Sebastian

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to San Sebastian departing on 10/1. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
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
Iberia Logo
2:17 pm - 8:40 amDEN-EAS
34h 23m2 stops
Iberia Logo
9:20 am - 11:38 pmEAS-DEN
22h 18m2 stops
$864Iberia
Find Deal
Tue, Sep 30 - Fri, Oct 10
American Airlines Logo
5:06 pm - 8:50 pmDEN-EAS
19h 44m2 stops
American Airlines Logo
9:20 am - 9:59 pmEAS-DEN
20h 39m2 stops
$880American Airlines
Find Deal
Mon, Jul 14 - Mon, Jul 21
 Logo
4:15 pm - 8:50 pmDEN-EAS
20h 35m2 stops
 Logo
9:20 am - 1:45 pmEAS-DEN
36h 25m2 stops
$1,008
Find Deal
Mon, Jul 14 - Mon, Jul 21
 Logo
4:15 pm - 8:30 amDEN-EAS
32h 15m3 stops
 Logo
5:55 pm - 6:20 pmEAS-DEN
32h 25m3 stops
$1,373
Find Deal
Mon, Jul 14 - Mon, Jul 21
 Logo
9:40 am - 12:55 pmDEN-EAS
19h 15m2 stops
 Logo
5:55 pm - 5:55 pmEAS-DEN
32h 00m3 stops
$1,696
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 Iberia ($864) and American Airlines ($880).

Good to know

Cheapest flight$370
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 $370 for a one-way ticket and $864 for a round-trip.

  • 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.

  • Which is the best airline for flights from Denver to San Sebastian, American Airlines or Iberia?

    The two airlines most popular with KAYAK users for flights from Denver to San Sebastian are American Airlines and Iberia. With an average price for the route of $1,861 and an overall rating of 7.2, American Airlines is the most popular choice. Iberia is also a great choice for the route, with an average price of $1,467 and an overall rating of 7.0.

  • 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.

Top airlines 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.
7.2
American AirlinesOverall score based on 10000 reviews
8.0Crew
7.5Boarding
7.2Comfort
6.9Entertainment
6.5Food
Airline reviews

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

8.0 ExcellentVictor, Jun 2025AUS - LAX
Read more American Airlines reviews

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Food was terrible, all served at once, poor quality . Wine and bread offered only once.

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

Cramped seats. FAA should make airlines have more legroom, for even short people complain

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

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.

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Flight delayed Service could be better Iberia staff are not really friendly

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

Flight from Costa Rica to Madrid was excellent. Good food and service. The flight from Madrid to Brussels was very poor . No food , no entertainment, no usb … Total package was quite expensive so you should give same service on the second flight

We travelled with Level, which is a subsidiary of Iberia. They mixed up all our seats, downgraded few from premium economy fo economy. The crew were not professional, they seem to be in a rush! Also some with an attitude

business class food was pretty average otherwise it was a good experience

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.