$284 Find Cheap Flights from Spain to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Denver departing on 3/16. 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, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Denver, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$638
Multiple Airlines
Mon 3/23Tue 4/14
ALC - DEN • 2 stops
Cheapest one-way
$358
Typical prices: $693-$852
Multiple Airlines
Mon 3/16
MAD - DEN • 2 stops
When to travel
February
Cheapest • 18% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Spain to Denver

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Spain to Denver 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 Spain to Denver

Mon, Mar 23 - Tue, Apr 14
Multiple Airlines Logo
6:30 pm - 8:26 am
ALC
-
DEN
44h 56m2 stops
Multiple Airlines Logo
4:40 pm - 10:55 pm
DEN
-
ALC
22h 15m1 stop
$638Multiple Airlines
Mon, Jan 26 - Mon, Feb 9
American Airlines Logo
10:40 am - 6:13 pm
BCN
-
DEN
15h 33m1 stop
American Airlines Logo
12:52 pm - 8:50 am
DEN
-
BCN
11h 58m1 stop
$644American Airlines
Thu, Jan 22 - Wed, Feb 4
American Airlines Logo
12:30 pm - 10:24 pm
BCN
-
DEN
17h 54m1 stop
American Airlines Logo
7:50 am - 8:50 am
DEN
-
BCN
17h 00m1 stop
$645American Airlines
Tue, Mar 24 - Tue, Apr 14
Multiple Airlines Logo
9:25 am - 8:26 am
ALC
-
DEN
30h 01m2 stops
Multiple Airlines Logo
4:40 pm - 10:55 pm
DEN
-
ALC
22h 15m1 stop
$648Multiple Airlines
Tue, Mar 17 - Tue, Apr 21
Scandinavian Airlines Logo
6:35 pm - 11:23 pm
ALC
-
DEN
35h 48m2 stops
Scandinavian Airlines Logo
11:43 am - 10:40 am
DEN
-
ALC
38h 57m2 stops
$713Scandinavian Airlines
Thu, Feb 5 - Tue, Feb 10
United Airlines Logo
7:40 am - 2:35 pm
BIO
-
DEN
14h 55m1 stop
United Airlines Logo
11:49 am - 9:55 pm
DEN
-
BIO
26h 06m2 stops
$771United Airlines
Fri, Feb 6 - Fri, Mar 6
Lufthansa Logo
6:45 am - 7:26 pm
BIO
-
DEN
20h 41m2 stops
Lufthansa Logo
8:20 pm - 11:20 pm
DEN
-
BIO
19h 00m1 stop
$780Lufthansa
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
12:50 pm - 6:24 pm
BIO
-
DEN
37h 34m2 stops
United Airlines Logo
9:59 am - 10:50 am
DEN
-
BIO
16h 51m2 stops
$786United Airlines
Fri, Jan 23 - Tue, Jan 27
Lufthansa Logo
11:45 am - 9:59 pm
PMI
-
DEN
18h 14m2 stops
Lufthansa Logo
4:20 pm - 5:30 pm
DEN
-
PMI
17h 10m1 stop
$793Lufthansa
Thu, Feb 19 - Thu, Feb 26
Iberia Logo
6:50 am - 10:37 pm
LPA
-
DEN
22h 47m2 stops
Iberia Logo
8:00 am - 11:15 am
DEN
-
LPA
20h 15m2 stops
$866Iberia
Booking Insights

KAYAK's insights & trends for flights to Denver

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

What is the cheapest month to fly to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Denver is September, where tickets cost $761 on average for one-way flights. On the other hand, the most expensive months are December and August, where the average cost of tickets from Spain is $1,040 and $1,013 respectively. For return trips, the best month to travel is February with an average price of $757.

How far in advance should I book a flight to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 78 days before departure.

Good to know

Low seasonNovember
Cheapest flight$358
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Madrid to Denver

FAQs - booking Denver flights

  • How far is Denver Intl Airport from central Denver?

    There are 18 miles between Denver city center and Denver Intl Airport.

  • What is the name of Denver’s airport?

    Denver is served by Denver Intl Airport, also commonly referred to as Denver or Denver Intl. The airport code is DEN.

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

    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 to Denver.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 to Denver?

    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 Denver with an airline and back with another airline.

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

    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 Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to Denver are there each week?

    Each week there are around 6,017 direct flights from within Spain to Denver. The most common day for departures is Thursday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to Denver

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Denver flight deals.

Reviews of the top 3 airlines serving from Spain to Denver

 
See real verified KAYAK customer reviews for airlines flying to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Spain to Denver. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Denver? 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.
7.4
United AirlinesOverall score based on 9139 reviews
7.1Entertainment
8.1Crew
7.7Boarding
7.3Comfort
6.6Food
Airline reviews

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

6.0 GoodAnonymous, Jan 2026
MKE - DEN
Read more United Airlines reviews

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Boarding, crew, food and baggage handling excellent (no bags lost, yay!). However for an 8 hour flight, there were limited entertainment options. And really would have liked to have a pillow!

The crew was super friendly and helpful. The food was quite good. An overall positive experience.

A more organized boarding experience and better food would have made the experience better.

why can't planes be boarded from back to front?? everything was great otherwise

We flew into Barcelona and the plane was so cramped and very uncomfortable and dirty. But we flew out of Madrid and that plane was much better. Would fly Iberia again.

For what we are willing to pay for international air travel, our experience was very good. We had no problem checking in, we had very little wait time at the AA counter in Madrid, and the staff in Madrid were very helpful. The flight crew was helpful and courteous, the plane was on the newer side, and our assigned seats were together without us needing to purchase them. The flight took off on time and arrived early. Overall, it was a pleasant experience or as much as could be expected in economy for almost 10 hours.

Boarding was easy, the flight left on time and even landed 20 minutes early. The food was plentiful and really good! The crew was kind & helpful. Overall it was an exceptional experience!

The flight was safe, confortable and convenient. Thank you. I hope to come back soon!

temperature was too cold there should be free blankets, seat are very uncomfortable, entertainment is limited.

Basic service for a decent price, all amenities are à la cart

I don’t understand how they charge as much as they do for such a poor experience

Lufthansa flight LH04414 from Munich to Washington DC, was fine. Efficient and safe!

I wish the plane had pod seating for business class. I had a window seat (8K) and I had to climb over the person sitting on the aisle when I needed to get up. Also there is no partition between the seats for privacy when sleeping. The Asian airlines have much nicer business class seating. Their seats are wider for better comfort when sleeping.

Bumpy ride, not Lufthansa‘s fault. Crew managed a situation over a back rest to far down well. It was two iles behind me. The person putting the seat down, against the other person’s knees, was quite rude and belligerent and needed to be told in a no nonsense matter to stopp. Male flight attendant did good job.

Patrick and the whole crew were amazing! Hope to have this team for all my European trips.

This review is based on 2 things: 1. The lack of hygiene on the plane. 2. William - the head flight attendant. The lack of cleanliness on the plane upon arrival was appalling. Being given a sanitizing wipe upon boarding of the plane is shocking when you consider the cost of a business class flight. UA expects me to do their job and clean all the bread, food and debris left from previous guests. Does this sound normal to you. The seat, the food table and the sides were full of crumbs, chocolate and dirt. When I told the flight attendant they just gave me more wipes so I could clean it myself. Secondly, William the business cabin head flight attendant was so busy flirting with a couple in the front that his attention to the other guests was minimal. He continuously asked them if they were ok or if they needed anything and it didn’t matter if the rest of us needed anything. And if you are the lead attendant shouldn’t you be checking if the bathrooms in business class are clean and needing toilet paper. There were 2 bathrooms in business. Halfway through the flight the first bathroom was closed and the second bathroom was dirty and had no toilet paper one hour and a half before the flight landed. He needs additional training on prioritizing things. He should care less about flirting and more about his work

Booked seats (paid extra) online and found they didn’t exist on the flight. We were then separated from the rest of our party. Given seats in the very back of the plane. We will not fly Discover or Lufthansa again. We will not book flights or travel through Kayak again!

Had a few open seats and could use it for a great rest ful journey

It was very good. Service was friendly and efficient, and food was good.

Airline food is airline food, but the plane was wonderful and the seating comfort outstanding. One of my best flights in quite a while.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
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Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver