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Cheap flights from Ireland to Colorado from £336

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/9. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — DEN
8 Sep — 15 Sep1
1 adult

Cheap flight deals from Ireland to Colorado

Keep the following information in mind while searching for Ireland to Colorado flight deals. Data was last updated 3 September 2025.

Round-trip from

£383

One-way from

£336

Popular in

July

Cheapest in

September

Average price

£529

Good round-trip deal

£444 or less
Lufthansa
  • Lufthansa
  • 19/11-3/12
  • 2 total stops
  • 26h 45m total
  • Ireland to Colorado
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27/9
  • 27/9
  • 2 total stops
  • 43h 44m total
  • Ireland to Colorado
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£64 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ireland to Colorado.
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Find flight deals from Ireland to Colorado

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 3 September 2025.

Wed 19/1105:10DUB - DEN
1 stop15h 30mLufthansa
Wed 3/1216:05DEN - DUB
1 stop11h 15mLufthansa
Deal found 1/9£383
Sat 13/909:20DUB - DEN
1 stop14h 13mAir Canada
Sat 4/1007:52DEN - DUB
1 stop16h 53mAir Canada
Deal found 2/9£401
Tue 28/1005:00DUB - DEN
1 stop15h 40mLufthansa
Thu 6/1116:05DEN - DUB
1 stop11h 15mLufthansa
Deal found 2/9£406
Tue 18/1109:10DUB - DEN
1 stop13h 50mLufthansa
Thu 27/1111:15DEN - DUB
1 stop16h 05mLufthansa
Deal found 2/9£408
Wed 19/1109:00DUB - DEN
1 stop14h 40mAir Canada
Wed 3/1220:35DEN - DUB
2 stops27h 35mAir Canada
Deal found 1/9£409
Wed 19/1111:30DUB - DEN
1 stop18h 48mMultiple Airlines
Tue 2/1217:25DEN - DUB
1 stop19h 15mMultiple Airlines
Deal found 1/9£411
Mon 6/1015:25DUB - DEN
Nonstop9h 34mAer Lingus
Mon 13/1019:55DEN - DUB
Nonstop8h 45mAer Lingus
Deal found 3/9£414
Tue 28/1008:50DUB - DEN
2 stops18h 51mDelta
Thu 6/1107:10DEN - DUB
2 stops17h 40mDelta
Deal found 3/9£415
Wed 26/1109:00DUB - DEN
1 stop14h 40mUnited Airlines
Fri 5/1212:50DEN - DUB
1 stop11h 40mUnited Airlines
Deal found 2/9£415
Fri 31/1008:00DUB - DEN
1 stop32h 23mUnited Airlines
Wed 5/1116:05DEN - DUB
1 stop11h 15mUnited Airlines
Deal found 3/9£416

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 3 September 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

Wed 19/11

05:10-13:40

1 stop15h 30m

Denver Intl

Wed 3/12

16:05-10:20

1 stop11h 15m

£383

DublinDenver

DUB - DEN

DUBDEN

Dublin

Sat 13/9

09:20-16:33

1 stop14h 13m

Denver Intl

Sat 4/10

07:52-07:45

1 stop16h 53m

£401

DublinDenver

DUB - DEN

DUBDEN

Dublin

Wed 29/10

05:10-14:40

1 stop15h 30m

Denver Intl

Fri 7/11

16:05-10:20

1 stop11h 15m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 28/10

05:00-14:40

1 stop15h 40m

Denver Intl

Thu 6/11

16:05-10:20

1 stop11h 15m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 28/10

05:00-14:40

1 stop15h 40m

Denver Intl

Sat 8/11

11:15-10:20

1 stop16h 05m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Thu 30/10

05:00-17:00

1 stop18h 00m

Denver Intl

Sat 8/11

11:15-10:20

1 stop16h 05m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Thu 30/10

05:00-17:00

1 stop18h 00m

Denver Intl

Thu 6/11

16:05-10:20

1 stop11h 15m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Wed 29/10

05:10-14:40

1 stop15h 30m

Denver Intl

Sat 8/11

11:15-10:20

1 stop16h 05m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Thu 30/10

05:00-17:00

1 stop18h 00m

Denver Intl

Fri 7/11

16:05-10:20

1 stop11h 15m

£406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Wed 29/10

05:10-14:40

1 stop15h 30m

Denver Intl

Thu 6/11

16:05-10:20

1 stop11h 15m

£406

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 19 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, January is the cheapest month in which you can book a flight from Ireland to Colorado (average of £667). Flying from Ireland to Colorado in July is currently the most expensive (average of £985). 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 3 September 2025.

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

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 3 September 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
8,937 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Aer Lingus
7.2
Good
1,248 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Icelandair
7.0
Good
544 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
British Airways
6.7
Okay
7,345 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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 74 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 £401, Lufthansa can have you in Colorado from Ireland in 14h 13m. Airlines will cover a distance of 4378 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ireland to Colorado one-way?

    To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at £401. WestJet flights start at £450 while deals on United Airlines start at £473 one-way.

  • 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, January is the cheapest month in which you can book a flight from Ireland to Colorado (average of £667). Flying from Ireland to Colorado in July is currently the most expensive (average of £985). 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

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Alternative routes for Ireland to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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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 3 September 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£320Average£530FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£444Average£656FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£460Average£581FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£539Average£649FlexibilityNo 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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