£295 Find Cheap Flights from Ireland to Denver – Compare and Save

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Cheap Flights from Ireland to Denver

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

Recent return flight deals from Ireland to Denver

Thu, 12 Nov - Thu, 26 Nov
Lufthansa Logo
05:10 - 15:35DUB  Dublin-DEN Denver Intl
17h 25m1 stop Frankfurt am Main
Lufthansa Logo
11:15 - 08:10DEN  Denver Intl-DUB Dublin
13h 55m1 stop Chicago O'Hare Intl
£495Lufthansa
Thu, 14 Jan - Mon, 18 Jan
Icelandair Logo
11:30 - 18:00DUB  Dublin-DEN Denver Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 10:15DEN  Denver Intl-DUB Dublin
11h 35m1 stop Reykjavik Keflavik Intl
£495Icelandair
Tue, 8 Dec - Fri, 25 Dec
Icelandair Logo
11:30 - 18:00DUB  Dublin-DEN Denver Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 10:15DEN  Denver Intl-DUB Dublin
11h 35m1 stop Reykjavik Keflavik Intl
£496Icelandair
Thu, 14 Jan - Mon, 18 Jan
Icelandair Logo
11:30 - 18:00DUB  Dublin-DEN Denver Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 10:15DEN  Denver Intl-DUB Dublin
11h 35m1 stop Reykjavik Keflavik Intl
£496Icelandair
Thu, 26 Nov - Thu, 3 Dec
Lufthansa Logo
05:10 - 13:40DUB  Dublin-DEN Denver Intl
15h 30m1 stop Frankfurt am Main
Lufthansa Logo
11:15 - 08:10DEN  Denver Intl-DUB Dublin
13h 55m1 stop Chicago O'Hare Intl
£504Lufthansa
Mon, 18 Jan - Thu, 28 Jan
British Airways Logo
08:45 - 15:10DUB  Dublin-DEN Denver Intl
13h 25m1 stop London Heathrow
British Airways Logo
17:05 - 13:35DEN  Denver Intl-DUB Dublin
13h 30m1 stop London Heathrow
£510British Airways
Thu, 12 Nov - Thu, 26 Nov
Lufthansa Logo
05:10 - 15:35DUB  Dublin-DEN Denver Intl
17h 25m1 stop Frankfurt am Main
Lufthansa Logo
10:20 - 10:20DEN  Denver Intl-DUB Dublin
17h 00m1 stop Washington, D.C. Dulles Intl
£515Lufthansa
Mon, 7 Dec - Mon, 14 Dec
British Airways Logo
08:45 - 15:10DUB  Dublin-DEN Denver Intl
13h 25m1 stop London Heathrow
British Airways Logo
17:01 - 13:35DEN  Denver Intl-DUB Dublin
13h 34m1 stop London Heathrow
£525British Airways
Sun, 20 Dec - Thu, 31 Dec
Aer Lingus Logo
15:50 - 00:32DUB  Dublin-DEN Denver Intl
15h 42m1 stop Chicago O'Hare Intl
Aer Lingus Logo
10:21 - 09:30DEN  Denver Intl-DUB Dublin
16h 09m1 stop Chicago O'Hare Intl
£2,796Aer Lingus
Sun, 20 Dec - Thu, 31 Dec
Aer Lingus Logo
15:50 - 00:32DUB  Dublin-DEN Denver Intl
15h 42m1 stop Chicago O'Hare Intl
Aer Lingus Logo
10:21 - 09:30DEN  Denver Intl-DUB Dublin
16h 09m1 stop Chicago O'Hare Intl
£2,820Aer Lingus
Booking Insights

KAYAK's insights & trends for flights to Denver

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

What is the cheapest day to fly to Denver?

Based on KAYAK data, the cheapest day to fly to Denver is Monday where round-trip tickets can be as cheap as £604. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are £898 on average.

What is the cheapest month to fly to Denver?

The cheapest month for flights to Denver is April, where tickets cost £388 on average for return flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Ireland is £723 and £716 respectively. For one-way flights, the best month to travel is October with an average price of £423.

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

The cheapest time of day to fly to Denver is generally in the evening, when round-trip flights cost £634 on average. The most expensive time of day to fly to Denver is generally in the evening, which is peak travel time and where the average cost of a ticket is £634.

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

To get a below average price, you should book around 3 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know - Cheap tickets from Ireland to Denver

Low season

April

Cheapest flight

£295
Best time to beat the crowds (33% less expensive on average)
Most popular time to fly and prices are also 19% lower on average.
Flight from Dublin to Denver

FAQs - booking Denver flights

  • How far is Denver Intl Airport from central Denver?

    The city centre of Denver is 18 miles from Denver.

  • 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 travellers 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 146 direct flights from within Ireland to Denver. The most common day for departures is Wednesday, with 15% 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 flying from Ireland 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 1869 reviews
7.5Boarding
6.7Food
7.1Entertainment
7.2Comfort
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.

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

The travel on premium economy class was very positive. Comfortable with plenty of space and leg room. The service throughout was top notch. Crew members were kind and helpful. Food and entertainment were excellent.

Long line with check in at the DIA British Airway counter.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

Everything excellent except for bag drop off. We started at the D area and that was so slow that it was eventually closed just as we were about to go to a station. We then went to F. We got one suitcase checked and then the screen showed that the station was no longer operable. There were long lines everywhere so we had to ask if we could butt in to the next station to finish. Again, this was the only incident, otherwise it was an excellent flying experience

There were no gluten-free vegan options available, so food was very limited on this flight, and some of the crew weren’t especially helpful about it. To make matters worse, a passenger was sick on board, and although the area was cleaned, the smell lingered for the rest of the journey. On top of that, we ended up circling for an extra hour, which only made the unpleasant situation drag on even longer.

We never made it onto this flight due to BA's lackluster organisation.

We arrived late to London, and consequently were 5 min. late to be allowed through security for our next flight. Even though dozens of people missed the same flight, BA did not radio ahead to hold open security for an extra 5-10 min. to allow people to get on the flight. This caused an additional 6 hour delay in London after waiting over an hour in Customer Service to get rebooked. They did not have enough staff on hand to help people in a timely manner. Not at all happy with the BA's customer care or customer service.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Seating is tight if you don’t upgrade. Food was decent. Boarding and unboarding was efficient. Smooth flight. Could make upgrades more affordable

The seat was very uncomfortable. It helped to use the foot rest. Could not sleep because of the seat.

Travelling to a place near Denver?

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