£278 Find Cheap Flights from Ireland to Colorado – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ireland to Colorado departing on 20/8. 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.
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Cheap Flights from Ireland to Colorado

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ireland to Colorado 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 return flight deals from Ireland to Colorado

Thu, 3 Sep - Tue, 8 Sep
JetBlue Logo
11:30 - 22:58
DUB
-
DEN
18h 28m
1 stop
JetBlue Logo
23:54 - 09:00
DEN
-
DUB
26h 06m
1 stop
£506JetBlue
Thu, 27 Aug - Mon, 31 Aug
JetBlue Logo
11:30 - 22:58
DUB
-
DEN
18h 28m
1 stop
JetBlue Logo
14:04 - 09:00
DEN
-
DUB
11h 56m
1 stop
£514JetBlue
Thu, 27 Aug - Mon, 31 Aug
JetBlue Logo
11:30 - 22:58
DUB
-
DEN
18h 28m
1 stop
JetBlue Logo
09:54 - 08:20
DEN
-
DUB
15h 26m
1 stop
£516JetBlue
Tue, 3 Nov - Sun, 8 Nov
British Airways Logo
08:50 - 15:10
DUB
-
DEN
13h 20m
1 stop
British Airways Logo
17:01 - 12:15
DEN
-
DUB
12h 14m
1 stop
£603British Airways
Wed, 4 Nov - Tue, 10 Nov
British Airways Logo
08:50 - 15:10
DUB
-
DEN
13h 20m
1 stop
British Airways Logo
17:01 - 12:10
DEN
-
DUB
12h 09m
1 stop
£603British Airways
Mon, 2 Nov - Mon, 9 Nov
British Airways Logo
08:50 - 15:10
DUB
-
DEN
13h 20m
1 stop
British Airways Logo
09:09 - 09:50
DEN
-
DUB
17h 41m
2 stops
£603British Airways
Sun, 6 Sep - Sun, 20 Sep
Aer Lingus Logo
15:25 - 18:15
DUB
-
DEN
9h 50mdirect
Aer Lingus Logo
06:00 - 05:15
DEN
-
DUB
16h 15m
1 stop
£617Aer Lingus
Tue, 1 Sep - Tue, 8 Sep
Icelandair Logo
14:15 - 09:03
DUB
-
DEN
25h 48m
2 stops
Icelandair Logo
16:40 - 11:05
DEN
-
DUB
11h 25m
1 stop
£791Icelandair
Wed, 2 Sep - Sun, 6 Sep
Aer Lingus Logo
15:25 - 18:15
DUB
-
DEN
9h 50mdirect
Aer Lingus Logo
18:40 - 14:50
DEN
-
DUB
13h 10m
1 stop
£831Aer Lingus
Fri, 28 Aug - Fri, 11 Sep
Icelandair Logo
12:15 - 23:16
DUB
-
DEN
18h 01m
2 stops
Icelandair Logo
16:40 - 13:15
DEN
-
DUB
13h 35m
1 stop
£933Icelandair
Booking Insights

KAYAK's insights & trends for flights to Colorado

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

What is the cheapest flight to Colorado?

These are the best return prices found by users searching on KAYAK in the last 5 days.

The cheapest ticket to Colorado from Ireland found in the last 5 days was to Denver, at £583 return. The most popular route is Dublin (DUB) to Denver (DEN) and the cheapest return ticket found on this route in the last 5 days was £583.

What is the cheapest month to fly from Ireland to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ireland to Colorado, 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 from Ireland to Colorado is January, when tickets cost £472 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is £618 and £591 respectively.

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

The average price for all round-trip flights from Ireland to Colorado depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Colorado is generally in the evening, when retur flights cost £599 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the evening, which is peak travel time and where the average cost of a ticket is £599.

How far in advance should I book a flight from Ireland to Colorado?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Colorado, 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 on a flight from Ireland to Colorado, you should book around 2 weeks before departure, which saves you about 15% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know - Cheap tickets from Ireland to Colorado

Low season

April

Cheapest flight

£278
Best time to beat the crowds (28% less expensive on average)
Most popular time to fly and prices are also 13% lower on average.
Flight from Dublin to Denver

FAQs for booking flights from Ireland to Colorado

  • How does KAYAK find such low prices on flights from Ireland to Colorado?

    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 Ireland to Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ireland to Colorado is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ireland to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Ireland to Colorado 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 from Ireland to Colorado?

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

  • What is the cheapest day to fly to Colorado?

    Based on KAYAK data, the cheapest day to fly to Colorado is Monday when return tickets can be as cheap as £509. On the other hand, the most expensive day to fly is Sunday, when return prices are £890 on average.

Reviews of the top 3 airlines flying from Ireland to Colorado

 
See real verified KAYAK customer reviews for airlines flying to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to Colorado. 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 Ireland to Colorado? 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 1683 reviews
6.7Food
7.0Entertainment
7.4Boarding
8.1Crew
7.2Comfort
Airline reviews

On time departure and arrival at LAX - good inflight entertainment - all basic seats on every airline right now begin to feel small after 10 hours!!

8.0 ExcellentSusie, Jul 2026
DUB - LAX
Read more Aer Lingus reviews

On time departure and arrival at LAX - good inflight entertainment - all basic seats on every airline right now begin to feel small after 10 hours!!

I was pleasantly surprised. I've never flown this airline and the seats were comfy, I couldn't select my seat but luckily got aisle and was able to comfortably sleep the whole trip except when they came around with an in flight free meal, drinks then snack at the end. I'd fly with Aer Lingus again. The only annoying thing is you had to pay for WiFi for different hours of usage but luckily I didn't need it

This was a great flight. I love the way they had general boarding board from the back first by seat row and in general the flight was very comfortable. The seats were actually comfy, and the food served was surprisingly good.

A seat was broken There was a delay of 45min A checked bag was missing in Boston

The service was some of the worst I have experienced on an international flight. The service was rude, the quality of the food was very low. The speed of service was insanely quick. You couldn’t finish your pretzels before the meal came before the coffee came before trash collection came. Then they never came back for 5 hours. They rushed everything so they could get it over with.

A special shout-out to one of the check-in staff at DUB yesterday noon. We had to use the "Closing Flights" counter and we met, hands down, the most efficient person - able to resolve several issues in the matter of minutes, while remaining polite and calming everyone down. Great job, Aer Lingus!

Everything was great!! I had no problems!! I would fly Aer Lingus again! 🥰

From Rome to Dublin if you want any refreshments you have to pay for them, Not used to this as we typically get soft drinks and a little snack on a 3hour flight in the US.

Boarding was fine, difficult to understand the guy over the speaker though so we were unsure when exactly to board until they updated the monitor by the gate. Flight itself was fine, nice flight attendants, seats were comfortable enough, good selection of entertainment on the screens. Other airlines at a similar price point have included wifi though, at a minimum messaging, for free, so that was a little disappointing to not have that. But otherwise fine. Food was pretty decent, nice hot meal, good drink selection, nice snacks. Bathrooms were ok, could've been cleaned a little more often, but they were never bad.

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.

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

Terrible way of boarding in Reykjavik. Seats comfortable. Meal was good.

Unlike my prior three connections on this latest journey, this flight was fairly good. Only issue was boarding as it was once again one of those Icelandic issues of bunch up, walk in the rain to a bus that then has you run up three flights of stairs to board the plain. I was in Saga class but the bus scramble eliminates any chance you get on first and have to then find a place to squeeze your carry on into an overhead that the people in economy populate so they can grab it on their way out up front. But unlike other Icelandic flights this journey I did find more the of the business class like accommodations then the other air segments. This one found a pillow and blanket waiting for me and I actually received a small cup of sparkling wine and had a bottle of water in place. Service was attentive and the flight departed and arrived on time. Received a menu and had choices of a hot or cold meal. I choose the hot which was cod and it was good. Decent size portion, salad and a choice of dinner rolls. Beverage menu was a selection of wines, beer and soft drinks. Desert was a small Tiramisu. Overall the six hour flight was a good experience for the price point.

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.

The flight itself was fine, even with a one-hour delay leaving on the Reykjavik tarmac (the lost time was made up during flight). Our experience at the Reykjavik airport on arrival was terrible due mostly to the one hour it took for passport control. Only two stations were open for our category, and the room was full with a huge crowd.

Awful. The Iceland airport was a complete mess. Boarding was a chaotic, the seats were awful, there was a group of rowdy 20 something men in our row hooting and hollering, ordering alcoholic drink after drink. Yelling and laughing at the top of their lungs and the crew just went along with it. Passengers complained to the men, asking if they could keep it down (it was a night time flight so people wanted to sleep). They never listened crew continued to laugh with them, flirt with them and serve them more drinks. No free food or snacks, seats were horribly uncomfortable. Worst flight I've had in a long time

At least one soda free, felt like I was nickeled to death.

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

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

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

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.

The crew was so unfriendly. Our (the last) section of the plane only got drink service once during an over 9 hour flight. When it come to the main meal service we only got a vegetarian option and where told the chicken option gone. About 30 minutes later I went to the bathroom and lo and behold the whole crew were eating the chicken option.

Everything you need to know for your flight to Colorado

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.