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$352+ Cheap flights from Ireland to Denver (DEN)

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — DEN
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap flight deals from Ireland to Denver

Keep the following information in mind while searching for Ireland to Denver flight deals. Data was last updated January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$400
(British Airways)

One-way from

$352
(WestJet)

Popular in

June

Cheapest in

September

Average price

$837
Provider with most accurate pricing for Dublin-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Dublin-Denver Intl flights.
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From Ireland to Denver Intl
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One-way flight from Ireland to Denver Intl
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Highest demand for flights based on searches. 13% potential increase in price ($125 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Ireland to Denver

Cheapest flights from Ireland to Denver
Explore the most affordable flight options available from Ireland to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

This British Airways deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/178:40 pmDUB - DEN
1 stop25h 50mBritish Airways
Sun 3/15:25 pmDEN - DUB
1 stop14h 40mBritish Airways
Deal found 1/7$400
This TravelUp deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:30 amDUB - DEN
1 stop13h 00mBritish Airways
Wed 6/106:40 pmDEN - DUB
1 stop16h 20mBritish Airways
Deal found 1/7$404
This British Airways deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/910:45 amDUB - DEN
2 stops18h 49mBritish Airways
Tue 2/242:28 pmDEN - DUB
2 stops16h 52mBritish Airways
Deal found 1/6$405
This British Airways deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/315:55 pmDUB - DEN
2 stops31h 18mBritish Airways
Sun 2/83:17 pmDEN - DUB
2 stops21h 23mBritish Airways
Deal found 1/7$406
This British Airways deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:50 amDUB - DEN
1 stop13h 40mBritish Airways
Tue 3/176:25 pmDEN - DUB
1 stop13h 55mBritish Airways
Deal found 1/8$411
This Iberia deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/310:55 amDUB - DEN
2 stops17h 07mMultiple Airlines
Tue 3/246:25 pmDEN - DUB
1 stop13h 55mMultiple Airlines
Deal found 1/7$417
This Flysmarter deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/258:40 pmDUB - DEN
1 stop25h 50mBritish Airways
Wed 4/86:40 pmDEN - DUB
1 stop16h 20mBritish Airways
Deal found 1/6$420
This Mytrip deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/68:30 pmDUB - DEN
1 stop27h 00mBritish Airways
Sun 5/246:40 pmDEN - DUB
1 stop14h 40mBritish Airways
Deal found 1/8$422
This TravelUp deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/54:05 pmDUB - DEN
1 stop30h 25mBritish Airways
Fri 2/205:25 pmDEN - DUB
1 stop13h 55mBritish Airways
Deal found 1/8$423
This British Airways deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:40 amSNN - DEN
1 stop15h 50mBritish Airways
Mon 5/48:40 amDEN - SNN
2 stops19h 40mBritish Airways
Deal found 1/7$584
This British Airways deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:20 amORK - DEN
1 stop16h 10mBritish Airways
Sun 5/106:40 pmDEN - ORK
1 stop22h 05mBritish Airways
Deal found 1/7$585
This American Airlines deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/301:45 pmSNN - DEN
2 stops16h 02mAmerican Airlines
Mon 5/47:51 amDEN - SNN
2 stops14h 34mAmerican Airlines
Deal found 1/5$646

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ireland to Denver 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 2,558,603 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Ireland to Denver that are best for you.

Fly from

Ireland

Fly to

Denver

Route

Depart

Return

Price

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 2/17

8:40 pm-3:30 pm

1 stop25h 50m

Denver Intl

Sat 2/28

5:25 pm-12:45 pm

1 stop12h 20m

$400

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 2/17

8:40 pm-3:30 pm

1 stop25h 50m

Denver Intl

Mon 3/2

5:25 pm-5:05 pm

1 stop16h 40m

$400

DublinDenver

DUB - DEN

DUBDEN

Dublin

Thu 2/5

8:50 am-3:30 pm

1 stop13h 40m

Denver Intl

Fri 2/20

12:21 pm-10:00 am

2 stops14h 39m

$400

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 2/17

8:40 pm-3:30 pm

1 stop25h 50m

Denver Intl

Sun 3/1

5:25 pm-7:40 pm

1 stop19h 15m

$400

DublinDenver

DUB - DEN

DUBDEN

Dublin

Mon 2/9

8:50 am-10:34 pm

2 stops20h 44m

Denver Intl

Sun 2/22

5:25 pm-7:55 am

1 stop31h 30m

$405

DublinDenver

DUB - DEN

DUBDEN

Dublin

Sat 1/31

5:55 pm-6:13 pm

2 stops31h 18m

Denver Intl

Sat 2/7

3:17 pm-3:00 pm

2 stops16h 43m

$406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Mon 2/9

10:45 am-10:34 pm

2 stops18h 49m

Denver Intl

Tue 2/24

2:28 pm-2:20 pm

2 stops16h 52m

$406

DublinDenver

DUB - DEN

DUBDEN

Dublin

Tue 3/10

8:50 am-4:30 pm

1 stop13h 40m

Denver Intl

Tue 3/17

6:25 pm-2:20 pm

1 stop13h 55m

$411

ShannonDenver

SNN - DEN

SNNDEN

Shannon

Thu 4/30

7:40 am-4:30 pm

1 stop15h 50m

Denver Intl

Mon 5/4

6:40 pm-8:35 pm

1 stop18h 55m

$584

CorkDenver

ORK - DEN

ORKDEN

Cork

Wed 5/6

7:20 am-4:30 pm

1 stop16h 10m

Denver Intl

Sun 5/10

6:40 pm-11:45 pm

1 stop22h 05m

$585

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 42 results
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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 round-trip 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 Denver

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

Currently, April is the cheapest month in which you can book a flight from Ireland to Denver (average of $431). Flying from Ireland to Denver in July is currently the most expensive (average of $708). 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.

How often are flights from Ireland to Denver delayed?

About 17% 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 Sunday 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 last year, Aer Lingus have had the lowest number of delays on this route, with just 16% of flights being delayed.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated January 8, 2026.
Get a feel of what it's like to fly with United Airlines, American Airlines, and Aer Lingus from Ireland to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,142 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,142 reviews
United Airlines
7.4
Good
9,142 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
American Airlines
7.2
Good
11,097 reviews
United Airlines
7.4
Good
9,142 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Aer Lingus
7.2
Good
1,429 reviews
United Airlines
7.4
Good
9,142 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Icelandair
7.1
Good
593 reviews
United Airlines
7.4
Good
9,142 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

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

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

    Located just 18.5 mi from the city center, Denver Intl (DEN) is the airport most travelers will use when flying to Denver from Ireland.

  • How popular is this Ireland to Denver flight route?

    Flights from Ireland to Denver Intl have been viewed 5 times in the past calendar month.

  • How long is the flight from Ireland to Denver?

    There are many flights that can get you from Ireland to Denver in 25h 50m. Fly via British Airways to get the fastest option. There are 4378 mi between Ireland and Denver.

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

    For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $444. Users have also found prices from $463 and $530 on British Airways and Aer Lingus, respectively.

  • What are the most popular routes from Ireland to Denver?

    The most popular route from Ireland to Denver is Dublin - Denver Intl. You may also consider Shannon - Denver Intl or Cork - Denver Intl.

  • 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 vacation 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, April is the cheapest month in which you can book a flight from Ireland to Denver (average of $431). Flying from Ireland to Denver in July is currently the most expensive (average of $708). 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Broomfield
Westminster
Lakewood
Golden
Greeley
Lone Tree
Wheat Ridge
Cripple Creek
Winter Park
Silverthorne
Central City
Frisco
Manitou Springs
Fort Morgan
Brighton
Longmont
Evergreen
Idaho Springs

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Alternative routes for Ireland to Denver

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 Denver

Discover the top 4 airlines that operate flights from Ireland to Denver. 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 2,558,603 searches. Data last updated January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$433Average$808FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$484Average$789FlexibilityNo cancel feeOn-time71%
IcelandairCheapest$601Average$737FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$625Average$879FlexibilityNo cancel feeOn-time69%

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