$409 Cheap Flights from Dublin (DUB) to Denver (DEN)

View $409 flight on Tue, May 5, 2026Opens in a new window

Popular airlines from Dublin Airport (DUB) to Denver Intl. Airport (DEN)

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Cheap Flights from Dublin to Denver (DUB-DEN)

Prices were available within the past 7 days and start at $409 for one-way flights and $447 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, Mar 4 - Sun, Mar 8
DUB
Dublin
DEN
Denver
$447 Roundtrip, found 1 day ago
$447
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Mar 4 from Dublin to Denver, returning Sun, Mar 8, priced at $447 found 1 day ago
Icelandair
Thu, Apr 16 - Tue, Apr 21
DUB
Dublin
DEN
Denver
$464 Roundtrip, found 3 days ago
$464
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Apr 16 from Dublin to Denver, returning Tue, Apr 21, priced at $464 found 3 days ago
Icelandair
Thu, Oct 1 - Mon, Oct 5
DUB
Dublin
DEN
Denver
$465 Roundtrip, found 3 days ago
$465
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Oct 1 from Dublin to Denver, returning Mon, Oct 5, priced at $465 found 3 days ago
British Airways
Mon, Sep 28 - Tue, Nov 3
DUB
Dublin
DEN
Denver
$465 Roundtrip, found 2 days ago
$465
Roundtrip
found 2 days ago
Select British Airways flight, departing Mon, Sep 28 from Dublin to Denver, returning Tue, Nov 3, priced at $465 found 2 days ago
American Airlines
Tue, Mar 3 - Tue, Mar 10
DUB
Dublin
DEN
Denver
$476 Roundtrip, found 20 hours ago
$476
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Tue, Mar 3 from Dublin to Denver, returning Tue, Mar 10, priced at $476 found 20 hours ago
Iberia
Fri, Oct 23 - Wed, Nov 4
DUB
Dublin
DEN
Denver
$480 Roundtrip, found 1 day ago
$480
Roundtrip
found 1 day ago
Select Iberia flight, departing Fri, Oct 23 from Dublin to Denver, returning Wed, Nov 4, priced at $480 found 1 day ago
Aer Lingus
Sun, Aug 30 - Mon, Sep 7
DUB
Dublin
DEN
Denver
$491 Roundtrip, found 14 hours ago
$491
Roundtrip
found 14 hours ago
Select Aer Lingus flight, departing Sun, Aug 30 from Dublin to Denver, returning Mon, Sep 7, priced at $491 found 14 hours ago
JetBlue Airways
Sat, May 2 - Sat, May 9
DUB
Dublin
DEN
Denver
$616 Roundtrip, found 5 days ago
$616
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Sat, May 2 from Dublin to Denver, returning Sat, May 9, priced at $616 found 5 days ago
Lufthansa
Mon, Sep 21 - Mon, Sep 28
DUB
Dublin
DEN
Denver
$694 Roundtrip, found 4 hours ago
$694
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Mon, Sep 21 from Dublin to Denver, returning Mon, Sep 28, priced at $694 found 4 hours ago
Air Canada
Sun, Oct 4 - Sat, Oct 17
DUB
Dublin
DEN
Denver
$699 Roundtrip, found 14 hours ago
$699
Roundtrip
found 14 hours ago
Select Air Canada flight, departing Sun, Oct 4 from Dublin to Denver, returning Sat, Oct 17, priced at $699 found 14 hours ago

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Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $447
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $447

Find the cheapest month to fly from Dublin (DUB) to Denver (DEN)

May is typically the cheapest month to fly

From $430 - $912 per traveler.

Frequently asked questions

How much does a flight from Dublin (DUB) to Denver, CO (DEN-Denver Intl.) cost?
You can find cheap one-way flights from $409 and cheap return flights from $447 Dublin (DUB) to Denver, CO (DEN-Denver Intl.) with Expedia. One-way flights usually range from $677 to $3710, and return flights typically cost between $653 and $5968. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Dublin (DUB) to Denver, CO (DEN-Denver Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
The cheapest month to fly from DUB to DEN is March when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
Aer Lingus offers around 7 weekly direct flights from DUB to DEN.
What is the cheapest airline that flies from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
Iberia is one of the cheapest airlines offering nonstop flights from Dublin (DUB) to Denver Intl. (DEN), with round-trip tickets starting from around $635. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
To find a cheap flight from Dublin (DUB) to Denver, CO (DEN-Denver Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
The best airline to fly with from Dublin (DUB) to Denver, CO (DEN) will differ from traveler to traveler. If you like to fly early, Aer Lingus offers early morning flights. If price is the most important factor, Aer Lingus typically offers the lowest fares. Aer Lingus also offers the most daily flights from Dublin to Denver, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
There are approximately 1 nonstop flights per day from (DUB) to Denver Intl. (DEN). For more options, look at flights that include layovers.
What is the earliest flight from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Dublin (DUB) to Denver, CO (DEN) usually departs at around 5:00 AM, with options from Lufthansa, Condor, and Alaska Airlines. This is a seasonal service active in March, and an early flight can help you make the most of your time in Denver. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Dublin (DUB) to Denver (DEN) are in the late morning, from 9am to noon. About 39% of passengers prefer this time window. Many major carriers, including UA:UA, AA:AA, and AC:AC, offer flights during this window. This timing is popular because it allows you to start your day in Dublin before heading to Denver.
How long does it take to fly from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
Flying nonstop from DUB to DEN takes around 9 hours 50 minutes, with the route covering approximately 4,382 miles. Flights with a layover typically take 4 hours longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
Business class seats are offered on the DUB to DEN route. Airlines that offer business class service on this route include:

  • Air Canada
  • United Airlines
  • Lufthansa
  • British Airways
  • Turkish Airlines
  • Aer Lingus
  • Icelandair
  • American Airlines
  • Air France
  • Swiss International Air Lines

How much is a business class flight from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
A non-stop, one-way business class flight from Dublin (DUB) to Denver, CO (DEN) is usually around $3,358 - $7,273. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Dublin (DUB) to Denver, CO (DEN-Denver Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Dublin (DUB) to Denver, CO (DEN-Denver Intl.) flight with Expedia?
It's easy to earn miles on a Dublin (DUB) to Denver, CO (DEN-Denver Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Denver from DUB (DUB)?
If you're planning to travel to Denver from DUB (DUB), you can fly into Denver Intl. (DEN) Some flights may connect through major hubs like Heathrow (LHR), Schiphol (AMS), Frankfurt Intl. (FRA) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Dublin (DUB) to Denver, CO (DEN-Denver Intl.) at the last minute?
Typically, booking a last minute flight from Dublin (DUB) to Denver, CO (DEN-Denver Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Dublin (DUB) to Denver, CO (DEN-Denver Intl.) flight and hotel package?
Securing a Dublin (DUB) to Denver, CO (DEN-Denver Intl.) Denver Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Dublin (DUB) to Denver, CO (DEN-Denver Intl.)?
If you booked your Dublin (DUB) to Denver, CO (DEN-Denver Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Dublin
Destination airport
Denver Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$447
Distance
4381 mi

Book with confidence

Dublin to Denver Flights

The cheapest times to fly from Dublin to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Dublin to Denver are during the month of March. You can find some of the cheapest flights from Dublin to Denver with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Dublin to Denver

Sunday is one of the best days to book for cheap flights from Dublin to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Dublin to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Dublin to Denver in 2026. You can also book with separate airlines for your outbound and return journeys, from $409 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Dublin to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Dublin to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Dublin to Denver Flights

*Flight schedules are subject to change.

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*Available to One Key members.