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Cheap flights from Ireland to Colorado from £296

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — DEN
24 Jan — 31 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Colorado

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Colorado
Explore the most affordable flight options available from Ireland to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 December 2025.

Wed 31/1212:05DUB - DEN
2 stops29h 00mUnited Airlines
Thu 9/409:35DEN - DUB
2 stops14h 45mUnited Airlines
Deal found 25/12£704
Wed 24/1213:35DUB - DEN
1 stop14h 33mUnited Airlines
Thu 1/110:15DEN - DUB
1 stop17h 05mUnited Airlines
Deal found 24/12£708
Wed 24/1213:25DUB - DEN
2 stops28h 03mDelta
Thu 1/107:10DEN - DUB
2 stops17h 35mDelta
Deal found 24/12£761
Wed 31/1212:05DUB - DEN
1 stop19h 10mUnited Airlines
Sun 4/112:32DEN - DUB
1 stop14h 23mUnited Airlines
Deal found 25/12£771
Wed 24/1211:30DUB - DEN
2 stops19h 29mMultiple Airlines
Thu 1/110:20DEN - DUB
3 stops16h 55mMultiple Airlines
Deal found 24/12£1,914

Find flight deals from Ireland to Colorado

Keep the following information in mind while searching for Ireland to Colorado flight deals. Data was last updated 25 December 2025.

Round-trip from

£296

Popular in

June

Cheapest in

September

Average price

£583

Good round-trip deal

£462 or less
British Airways
  • British Airways
  • 21/1-28/1
  • 3 total stops
  • 41h 55m total
  • Ireland to Colorado
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ireland to Colorado.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to Colorado that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 December 2025.
Use the filters below to find and compare flights from Ireland to Colorado that are best for you.

Fly from

Ireland

Fly to

Colorado

Route

Depart

Return

Price

DublinDenver

DUB - DEN

DUBDEN

Dublin

Thu 22/1

18:00-15:30

1 stop28h 30m

Denver Intl

Wed 4/2

17:25-17:00

1 stop16h 35m

£297

DublinDenver

DUB - DEN

DUBDEN

Dublin

Sun 8/2

11:30-21:11

1 stop16h 41m

Denver Intl

Sun 15/2

17:25-16:50

1 stop16h 25m

£316

DublinDenver

DUB - DEN

DUBDEN

Dublin

Thu 14/5

18:20-16:30

1 stop29h 10m

Denver Intl

Mon 18/5

18:40-19:35

1 stop17h 55m

£317

DublinDenver

DUB - DEN

DUBDEN

Dublin

Mon 11/5

20:55-16:30

1 stop26h 35m

Denver Intl

Fri 22/5

18:40-19:20

1 stop17h 40m

£317

DublinDenver

DUB - DEN

DUBDEN

Dublin

Sat 9/5

18:45-16:30

1 stop28h 45m

Denver Intl

Sat 16/5

18:40-19:25

1 stop17h 45m

£317

DublinDenver

DUB - DEN

DUBDEN

Dublin

Fri 1/5

20:15-16:30

1 stop27h 15m

Denver Intl

Tue 12/5

18:40-14:45

1 stop13h 05m

£318

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 12/5

10:30-20:47

2 stops17h 17m

Denver Intl

Sun 17/5

18:40-14:15

1 stop12h 35m

£321

DublinDenver

DUB - DEN

DUBDEN

Dublin

Mon 11/5

10:30-22:19

2 stops18h 49m

Denver Intl

Mon 18/5

18:40-18:05

1 stop16h 25m

£321

DublinDenver

DUB - DEN

DUBDEN

Dublin

Fri 1/5

13:45-21:50

1 stop15h 05m

Denver Intl

Tue 12/5

18:40-14:45

1 stop13h 05m

£337

DublinDenver

DUB - DEN

DUBDEN

Dublin

Wed 13/5

11:40-23:01

1 stop18h 21m

£354

Flights are sorted by cheapest return flights first.

Deals found on 24/12

Showing 1-10 of 18 results
1
2

Best time to book a flight from Ireland to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Ireland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Currently, April is the cheapest month in which you can book a flight from Ireland to Colorado (average of £319). Flying from Ireland to Colorado in June is currently the most expensive (average of £525). 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 CO?

Find hourly flight availability from Ireland to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 December 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 24% on flights from Ireland to Colorado by exploring options for tickets in the afternoon.

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated 25 December 2025.
Read through reviews of airlines operating flights from Ireland to Colorado, such as United Airlines, Aer Lingus, andIcelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,115 reviews
Check prices

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,115 reviews
United Airlines
7.4
Good
9,115 reviews
Check prices

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Aer Lingus
7.2
Good
1,412 reviews
United Airlines
7.4
Good
9,115 reviews
Check prices

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Icelandair
7.0
Good
592 reviews
United Airlines
7.4
Good
9,115 reviews
Check prices

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
British Airways
6.7
Okay
7,617 reviews
United Airlines
7.4
Good
9,115 reviews
Check prices

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Ireland to Colorado flight route?

    The Ireland to Colorado flight path was viewed by 80 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Ireland to Colorado?

    For as low as £297, British Airways can have you in Colorado from Ireland in 28h 30m. Airlines will cover a distance of 4378 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ireland to Colorado 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 Colorado?

    Currently, April is the cheapest month in which you can book a flight from Ireland to Colorado (average of £319). Flying from Ireland to Colorado in June is currently the most expensive (average of £525). 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

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Alternative routes for Ireland to Colorado

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Top 4 airlines flying from Ireland to Colorado

Discover the top 4 airlines that operate flights from Ireland to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 December 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£316Average£453FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£409Average£616FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£431Average£577FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£478Average£646FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to Colorado?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Colorado from Ireland today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ireland to Colorado?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ireland to Colorado.

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

Certainly. Search results for flights to Colorado from Ireland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from Ireland to Colorado and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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