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Cheap flights from Ireland to Denver from £183

DUB — DEN
20 Sep — 27 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Denver

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Denver

Fri 28/815:25 -
Nonstop9h 50m
Sat 12/923:59 -
1 stop22h 16m
Deal found 21/8£459
Thu 8/1012:35 -
1 stop18h 55m
Wed 21/1008:00 -
1 stop14h 10m
Deal found 20/8£525
Wed 16/909:15 -
1 stop13h 25m
Mon 28/917:40 -
1 stop17h 45m
Deal found 16/8£564
Sat 5/909:40 -
2 stops32h 40m
Fri 11/916:40 -
1 stop13h 35m
Deal found 20/8£565
Sat 5/909:15 -
1 stop13h 25m
Fri 11/910:55 -
1 stop15h 20m
Deal found 20/8£569
Thu 8/1012:35 -
1 stop18h 55m
Sun 11/1006:30 -
1 stop17h 00m
Deal found 20/8£570
Fri 4/911:00 -
1 stop13h 57m
Mon 14/908:45 -
2 stops16h 35m
Deal found 16/8£575
Fri 4/910:40 -
2 stops31h 40m
Mon 14/916:40 -
2 stops22h 00m
Deal found 16/8£577
Mon 7/908:55 -
2 stops21h 39m
Mon 28/917:40 -
1 stop14h 45m
Deal found 17/8£586
Wed 2/909:15 -
1 stop13h 25m
Mon 14/917:55 -
1 stop17h 30m
Deal found 18/8£587

Find flight deals from Ireland to Denver

Round-trip from

£564

One-way from

£381

Popular in

August

Cheapest in

February

Average price

£741
Air France
  • Air France
  • 16/9-28/9
  • 2 total stops
  • 31h 10m total
  • Ireland to Denver
Search Deals
WestJet
  • WestJet
  • 26/9
  • 2 total stops
  • 32h 40m total
  • Ireland to Denver
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£71 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ireland to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Wed 16/9

08:55-20:05

2 stops18h 10m

Denver Intl

Mon 28/9

06:15-09:15

2 stops20h 00m

£588

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Sat 5/9

05:55-19:51

2 stops20h 56m

Denver Intl

Fri 11/9

06:15-09:15

2 stops20h 00m

£590

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Thu 12/11

16:35-17:25

1 stop31h 50m

Denver Intl

Sun 22/11

19:30-15:30

1 stop37h 00m

£616

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Thu 12/11

11:30-18:00

1 stop13h 30m

Denver Intl

Tue 1/12

15:40-10:15

1 stop11h 35m

£630

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Thu 12/11

05:45-15:59

2 stops17h 14m

Denver Intl

Tue 1/12

15:58-14:30

2 stops15h 32m

£647

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Sun 8/11

05:45-15:49

2 stops17h 04m

Denver Intl

Mon 23/11

11:05-09:00

2 stops14h 55m

£647

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Thu 12/11

05:45-15:59

2 stops17h 14m

Denver Intl

Tue 1/12

12:25-08:45

1 stop13h 20m

£649

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Sat 21/11

08:50-20:25

2 stops18h 35m

Denver Intl

Sat 28/11

06:45-08:00

2 stops18h 15m

£652

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Mon 9/11

09:00-18:04

1 stop16h 04m

Denver Intl

Fri 20/11

20:25-08:10

1 stop28h 45m

£655

DublinDenver

DUB Dublin - DEN Denver Intl

DUBDEN

Dublin

Wed 11/11

13:35-20:00

1 stop13h 25m

Denver Intl

Wed 25/11

16:10-10:20

1 stop11h 10m

£657

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Ireland to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Ireland with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Ireland to Denver

What is the cheapest month to book a flight from Ireland to Denver?

Currently, February is the cheapest month in which you can book a flight from Ireland to Denver (average of £339). Flying from Ireland to Denver in August is currently the most expensive (average of £741). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IE to DEN?

When flying from Ireland to Denver, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How often are flights from Ireland to Denver delayed?

About 13% of weekly flights between Ireland and Denver have experienced delays in the past year, with the average delay time being 81 minutes.

What is the most punctual flight time for Ireland to Denver flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Denver flights?

Over the past year, Aer Lingus have had the lowest number of delays on this route, with just 13% of flights being delayed.

How far ahead should I book a flight from Ireland to Denver?

The best time to book flights from Ireland to Denver is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Denver

See what other customers who have flown with Aer Lingus,Icelandair, andBritish Airways from Ireland to Denver have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,711 reviews
Check prices

Crew

8.1

Overall

7.3

Boarding

7.5

Food

6.7

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
Aer Lingus
7.3
Good
1,711 reviews
Aer Lingus
7.3
Good
1,711 reviews
Check prices

Crew

8.1

Overall

7.3

Boarding

7.5

Food

6.7

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
Icelandair
6.9
Okay
730 reviews
Aer Lingus
7.3
Good
1,711 reviews
Check prices

Crew

8.1

Overall

7.3

Boarding

7.5

Food

6.7

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
British Airways
6.7
Okay
8,181 reviews
Aer Lingus
7.3
Good
1,711 reviews
Check prices

Crew

8.1

Overall

7.3

Boarding

7.5

Food

6.7

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.

Related info for your journey

  • What airport do you fly into for flights to Denver from Ireland?

    If you book a flight to Denver from Ireland, you will be flying to Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver.

  • How popular is this Ireland to Denver flight route?

    Within the past month, 25 users have taken a look at flights from Ireland to Denver Intl.

  • How long is the flight from Ireland to Denver?

    Delta, Turkish Airlines, and Icelandair can get you from Ireland to Denver in just under 13h 30m. Your travel time can differ by up to 18h 20m. The distance between Ireland and Denver is about 4378 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Ireland to Denver?

    Before booking your flight to Denver from Ireland, check out the most reliable airlines to get you to your destination on time: American Airlines (81%), Aer Lingus (81%), Iberia( 81%).

  • Can I find deals for flights from Ireland to Denver that include hotel bookings?

    Yes. In addition to deals on Ireland to Denver flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Denver.

  • Can I find deals for business class flights from Ireland to Denver?

    Yes. Cheapflights offers flight deals from Ireland to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to Denver?

    Currently, February is the cheapest month in which you can book a flight from Ireland to Denver (average of £339). Flying from Ireland to Denver in August is currently the most expensive (average of £741). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ireland to Denver

AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£297Average£350FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£329Average£450FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£360Average£589FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ireland to Denver. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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Millions of users choose and trust Cheapflights to book the best flight deals from Ireland to Denver for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ireland to Denver with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ireland to Denver, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ireland to Denver become cheaper?

Yes, Cheapflights offers price alerts on Ireland to Denver flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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