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€326 Find Cheap Flights to Denver – Compare and Save

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Everything you should know

Cheapest return flight
€550
Typical prices: €506-€842
Icelandair
Mon 12/11Mon 26/11
DUB - DEN • 1 stop
Cheapest one-way flight
€326
Typical prices: €551-€771
Multiple Airlines
Mon 19/11
DUB - DEN • 2 stops
Top airlines
Best reviews • 7.6 score
Airline reviews
Airline reviews
Top routes
Cheapest • 20% average savings
Most popular
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 19 weeks in advance save around 35% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
+1
Good to know
+1
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We hope you enjoy your trip to Denver!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights to Denver

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals to Denver

Thu, 12 Nov - Thu, 26 Nov
Icelandair Logo
11:30 - 18:00Dublin  Dublin-Denver Denver Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 10:15Denver  Denver Intl-Dublin Dublin
11h 35m1 stop Reykjavik Keflavik Intl
€550Icelandair
1 day ago
Thu, 12 Nov - Wed, 25 Nov
Icelandair Logo
11:30 - 18:00Dublin  Dublin-Denver Denver Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 10:15Denver  Denver Intl-Dublin Dublin
11h 35m1 stop Reykjavik Keflavik Intl
€550Icelandair
2 hours ago
Wed, 25 Nov - Wed, 2 Dec
Multiple Airlines Logo
19:05 - 22:34Dublin  Dublin-Denver Denver Intl
34h 29m2 stops Kastrup Copenhagen San Francisco
Multiple Airlines Logo
07:46 - 18:20Denver  Denver Intl-Dublin Dublin
27h 34m2 stops San Francisco Kastrup Copenhagen
€585Multiple Airlines
3+ days ago
Thu, 12 Nov - Thu, 26 Nov
Lufthansa Logo
05:10 - 15:35Dublin  Dublin-Denver Denver Intl
17h 25m1 stop Frankfurt am Main
Lufthansa Logo
17:25 - 22:45Denver  Denver Intl-Dublin Dublin
22h 20m1 stop Frankfurt am Main
€585Lufthansa
3+ days ago
Mon, 18 Jan - Thu, 28 Jan
British Airways Logo
08:45 - 15:10Dublin  Dublin-Denver Denver Intl
13h 25m1 stop London Heathrow
British Airways Logo
17:05 - 13:35Denver  Denver Intl-Dublin Dublin
13h 30m1 stop London Heathrow
€610British Airways
3+ days ago
Thu, 4 Feb - Mon, 8 Feb
British Airways Logo
08:50 - 15:10Dublin  Dublin-Denver Denver Intl
13h 20m1 stop London Heathrow
British Airways Logo
17:01 - 13:35Denver  Denver Intl-Dublin Dublin
13h 34m1 stop London Heathrow
€616British Airways
3+ days ago
Sat, 21 Nov - Sat, 28 Nov
United Airlines Logo
09:00 - 18:04Dublin  Dublin-Denver Denver Intl
16h 04m1 stop Toronto Pearson Intl
United Airlines Logo
11:49 - 09:55Denver  Denver Intl-Dublin Dublin
15h 06m1 stop Newark
€630United Airlines
3+ days ago
Thu, 12 Nov - Thu, 26 Nov
United Airlines Logo
09:00 - 18:04Dublin  Dublin-Denver Denver Intl
16h 04m1 stop Toronto Pearson Intl
United Airlines Logo
09:49 - 09:55Denver  Denver Intl-Dublin Dublin
17h 06m1 stop Newark
€630United Airlines
3+ days ago
Thu, 14 Jan - Mon, 18 Jan
American Airlines Logo
11:30 - 22:33Dublin  Dublin-Denver Denver Intl
18h 03m2 stops Philadelphia Charlotte Douglas
American Airlines Logo
12:22 - 09:10Denver  Denver Intl-Dublin Dublin
13h 48m2 stops Chicago O'Hare Intl Philadelphia
€675American Airlines
1 day ago
Thu, 14 Jan - Mon, 18 Jan
American Airlines Logo
11:30 - 22:33Dublin  Dublin-Denver Denver Intl
18h 03m2 stops Philadelphia Charlotte Douglas
American Airlines Logo
10:33 - 09:10Denver  Denver Intl-Dublin Dublin
15h 37m2 stops Dallas/Fort Worth Philadelphia
€676American Airlines
2 days ago
Booking Insights

Price, demand, and travel trends for flights to Denver

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

What is the cheapest flight to Denver?

Dublin to Denver is the cheapest route at €550 return, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

How much is a flight to Denver?

On average, a return flight from Ireland to Denver costs €667, based on KAYAK data over the past 12 months. Return fares from Dublin average €650, while Cork runs a bit higher at €891.

What is the cheapest day to fly to Denver?

Thursday is the cheapest day to fly to Denver at €592 return on average over the past 12 months on KAYAK. Saturday is the most expensive at €838.

What is the cheapest month to fly to Denver?

•February is the cheapest month to fly to Denver with an average price of €538 return.
•August (€905) and July (€848) are the most expensive.

Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to Denver?

Evening flights to Denver are the cheapest at €549 return on average. Morning flights are the most expensive at €706.

What is a good deal for flights to Denver?

Flights under €506 are considered a good deal. 25% of KAYAK users found return flights to Denver at or below these prices, with the lowest fares from:
•Dublin €496.

When are flights to Denver the cheapest?

Flights to Denver are cheapest 19 weeks before departure. Booking in this window typically costs about 35% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for flights to Denver

Low season

January

Cheapest flight

€326
Beat the crowds with an average 33% drop in travellers.
The most popular month to fly with an average 87% increase in travellers.
One-way flight from Dublin to Denver

When to book flights to Denver

Are your dates flexible? Find out the best times to travel to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your questions about flights to Denver, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • How do I know if a flight to Denver is a good deal?

    A good deal on a flight to Denver is around €506 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

  • How expensive are last-minute flights to Denver?

    Last-minute fares to Denver (booked within two weeks of departure) are typically 18% higher than the average return fare of €667.

  • What is the difference between the most popular and the most frequent airline at Denver?

    British Airways operates the most flights from Ireland to Denver at 0 per week, while Aer Lingus is the airline most often selected by KAYAK users searching for flights from Ireland to Denver. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

  • Which airlines should I consider for flights to Denver?

Your guide to booking Denver flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For the best chance at a low fare to Denver, book around 19 weeks before departure. Based on KAYAK data from the last 12 months, fares are historically about 35% lower during this window than last-minute fares.
  • For flights to Denver, a good return fare is around €506. If you find a fare below that, you're getting a strong deal.
  • If your travel dates are flexible, consider flying to Denver in February. Return fares historically average €538, making February the cheapest month to travel based on KAYAK data from the last 12 months.
  • Before you book:

    • Check the route's typical price range so you can spot a deal.
    • Confirm baggage fees and seat selection costs on budget carriers.
    • Verify whether you need any travel documents beyond an ID.
    • Pick a departure airport, since your nearest may not be the cheapest origin.
  • Shift your departure to afternoon to save up to €157 on a return flight. Afternoon flights to Denver average €549 compared to €706 for morning flights.
  • Bag allowances vary by airline, fare type, cabin class, and route. On flights to Denver, some airlines may include bags at no extra cost. For example, Aer Lingus includes a cabin bag and a checked bag in Economy class, British Airways includes a cabin bag in Economy class, and Iberia includes a cabin bag in Economy class. Always check the fare details before booking, since bag policies can change by ticket type.

Reviews of the top 5 airlines flying to Denver

 
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.
7.3
Aer LingusOverall score based on 1868 reviews
7.5Boarding
7.1Entertainment
7.2Comfort
6.7Food
8.1Crew
Airline reviews

The staff on the flight were utterly brilliant; there was a young man who was particularly exceptional. Boarding was quick and seamless, and service was great! Seats were fab, as was the entertainment and its ease of access

10.0 ExcellentJessica, Oct 2026
Read more Aer Lingus reviews

The staff on the flight were utterly brilliant; there was a young man who was particularly exceptional. Boarding was quick and seamless, and service was great! Seats were fab, as was the entertainment and its ease of access

i’m The staff on my flight were amazing as always, beautiful professional staff, they do amazing job. the food ? room for improvement

The agents at the boarding desk were not very helpful, however the hostesses on board the flight were great, the food was ok, and there were lots for choices for entertainment. I was stuck in an middle row seat which was a pain on a full flight, but otherwise the flight was great.

The man in front of me reclined the entire flight, including during meals, which was aggravating. My screen had issues with brightness and kept flickering in and out.

Still some confusion about my baggage which was disconcerting. It was nice that there was extra space on the flight for comfort reasons. Staff very friendly

Everything was smooth and the meal was delicious. I really appreciated that Aer Lingus still offers complimentary beverages, food, luggage and headphones. It was nice that the main meal also featured some items typical to Ireland including the wheaten bread and Kerrygold butter. I generally found the flight a quite relaxing and enjoyable experience.

The seats are so close that you have 0 room to move. Not acceptable for an 11 hour flight.

Easy process you definitely need 3 hours to get on board from Fuminchino airport

Didn't make it to this flight as we sat on the tarmac for 1.5 hours.

Dublin airport is big and US Customs and Immigration screening officers are is part of the process there. This eliminates screening upon arrival to US, however should be taken into consideration when playing your transfer. After all, pleasant experience enhanced by draft Guinness and Irish coffee at the buffet area near the gate. We loved boarding by the row, back of the airplane first.

Seats needs to be wirer and food is very poor

Pretty much the exact same comments for this flight, there was crazy weather!

I have been flying united for a long time but now I’m done

1) United economy seats barely recline. 2) I have yet to get United WiFi to work, after numerous flights.

Return flight was perfect. All on time and no hiccups. However, going was another story. I don't blame United for the weather, but I am rather disappointed in its response to my getting stranded in my layover city for the night. United gave me a $20 food voucher. That's it. But besides this policy, the employees were incredibly helpful rerouting me to my final destination in Fort Lauderdale, FL. So overall, 8 out of 10. 10 out of 10 for flight comfort, inflight service and before flight service. 5 out of 10 for layover handling.

Santa Barbara is a super small and easy airport. Breezed through rental car return, breezed through Security, ordered a coffee and muffin and to my gate in less than 30 minutes. Maybe because it was a small airport we got the oldest plane. Hardly any overhead space and absolutely zero internet. Its NFL Sunday man! That hurt.

There were no vegan options for first class. Even though we were promised the satellite internet for free, we received NO wifi at all. Even though we were promised a 20-min early arrival, we ended up over 30 mins late.

Flight attendant incredibly rude. Stuck her finger in my drink and didn’t even have the courtesy to apologize.

food /beverage service was limited to one time which was unexpected for a flight that long. food wasn't very good.

From the boarding crew to the FAs was such a good team. All with smiles and positive energy. The pilots made an announcement of us waiting on some passengers who were late landing and I didn’t hear one person feel like it was an inconvenience which was wonderful. Massive kudos to all that worked that flight. Everyone was united. 😊💙

My feedback from the trip to Columbia to Chicago was meant for Chicago to Denver.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

Our bags took a long time to get unloaded once we landed.

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

One of the best flights I’ve had. So smooth.

Because I can’t stand very long in one place, I was allowed to reword.

Over 3 hours and 25 mins delay, entertainment screen froze on me for more than half the flight

they couldn’t not serve coffee or tea as the water that was boarded was not potable. the veggie food was lousy. tasted very sweet. there was a crying kid a few rows ahead. what about the difficulty caused to other passengers because the kid was crying so much. parents should know their kids better and not travel. it was a very difficult situation. would not recommend this airline next time.

the internet connection was poor. and the change of time

Horrible, they detoured my first flight to Roswell and the communication on why was very poor, We arrive late then waited 20 minutes for them to set up the bridge. I arrived at my connecting flight gate and was told my seat had been given to someone else even though the flight was delayed. We then get to customer service and the computer went down for several hours. The person at the counter was eating their lunch while trying to help me get a flight. Dhe then rebooked on a flight with a connection that was leaving two hours prior to me landing. So I had to then stand in another line to get rebooked. I missed my trip to Morroco and waited 7 days to finally get my luggage. It was a nightmare.

Based upon our entire experience with Iberia, we will never fly the airline nor recommend the airline to anyone. The flight to LA was fine and the crew on this one flight was god, but Iberia treats its customers (us) horribly. There was not one flight on this trip that they did not treat us poorly. We were bumped, lost seats, lost luggage etc all on flights we booked over a year in advance. Not one leg with Iberia went smoothly. And now they have lost our luggage somewhere in Madrid. This is a horrible airline. A truly horrible airline. And Underpricer recommended by Kayak is horrible as well. The lesson learned is to book directly with an airline and stay away from Iberia at all costs.

Very cheap airline, not worth the price. And they almost lost my luggage at JFK during a direct flight. I can't believe I paid that much money for a horrible 'premium economy' flight. Just fly economy on the cheapest end; premium economy is no different. Very very poor.

There was confusion over the electric wheelchair. Though it was categorized and double checked at checking the gate seemed confused by the chair.

Boarded in group three at Barcelona, which meant going from a gate outside onto a bus to ride across the airport to a plane waiting on the tarmac. When we arrived at the plane, crew behavior told us something was wrong. Bus driver would not let us off for almost twenty minutes, despite being crammed shoulder to shoulder. Eventually, we got onto the plane, but were then told that someone “forgot” to refuel the plane and the truck to do so had not arrived. We departed late enough that we missed our connecting train in NYC, which was the last train of the evening, so we had to stay awake all night in the passenger waiting area of Amtrak’s Penn Station, which was almost impossible to get to because the station was now closing, as it was after midnight. We had to haul four suitcases a few blocks on city streets in the rain to get to the one remaining open entrance to Penn Station. We ended up being up for 36 hours straight because someone couldn’t do their job. Never, ever again would I fly this airline.

All four segments of my trip on Iberia were late for various reasons. No apparent effort to stay on schedule. Never flying Iberia again.

How to get an aisle seat without paying extra? The young lady next to me was assigned the seat.

Flight was ok but the food was poor, and the business chairs were not comfortable.

Great experience in Saga Premium. Food was tasty and felt fresh. Seat was comfortable (enough) - would have wanted a layflat seat.

The flight itself was excellent, but getting to the plane was literally an exercise in pain. My wife needs a wheelchair and can only stand/walk for short periods before having extreme pain. We had to take a bus to a loading platform and use a terrible elevator to get up to the plane. Meanwhile the rest of the bus were using the stairs. This meant the people who needed to sit down were stuck standing at the end of the line while everyone else boarded. My wife was in agony.

It was amazing. I sat in First Class as a Saga Premium member, and my service was top notch. It was wonderful. I only recently joined Saga Club since I do travel to Scandinavia often and enjoy flying through Reykjavik on Iceland Air versus other ways of travelling to Europe. This was my first trip sitting in first class, which I honestly wasn’t expecting!

There were no places to sit at the gate. Most people had to sit on the floor or stand waiting for the gate to open and board. We were told we needed passport and the person hardly looked at them. Maybe for 2 seconds. No announcement made asking to board by row or group. On a 5.5 hour flight the crew only came through the cabin 2 times offering water and buy everything else. For the price of the ticket at least offer free soda! The airliner was very comfortable

Crew was wonderful. I knew going in that the seats were not lie-flat in business class, but they reclined less than I expected. To save on waste, you have to ask for which pieces of the amenity kit you are interested in, which they will gladly give to you. Flight was fairly short, so no issues. I did have one piece of luggage not show up at terminal on landing. They were great about looking for it. Found it...it actually did make the flight and was listed as "not picked up" (?????--we stayed over an hour looking for it, including in the odd-sized baggage claim.) Since "not picked up" they will not ship to my house and I have to go back to airport, which is in another town. I probably could have pressed this issue, but headed back to airport for another flight anyway, so will pick up then.

How can the airline deploy the oldest 757-200 with a broken down entertainment system and no WiFi for a cross Atlantic 7:50 hr torture chamber experience?? My seat 3A couldn’t be reclined. The footrest was flimsy and useless. And there’s no leg support unlike their newer 737-Max which they lavish on intra-Europe routes. Shame!!

We paid for saga class, which is the business class for international. My seat was broken and did not recline and my monitor for in-flight entertainment was broken.

Friendly flight crew. Airplane (757) configured as a domestic flight (no lie-flat seats) & no advanced meal selection.

The most uncomfortable seat i’ve ever had on a flight

Travelling to a place near Denver?

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