430 € Return - Cheap flights to Denver International Airport

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Flight deals to Denver International

Looking for a cheap last-minute deal or the best return flight to Denver International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest time to fly to Denver International

Flexible on travel dates? Find the cheapest month – or even day – to fly to Denver International.

Airports near Denver

Compare routes to Denver below. You may find an airport to fly into that's cheaper, faster, or easier.

Direct flights to Denver International

Frequently asked questions

The average flight time to Denver International is 9 hours and 34 minutes. We've calculated this based on journeys from Dublin.
Aer Lingus, American Airlines, Iberia and British Airways all fly direct to Denver International.
The cheapest month to fly to Denver International is usually September.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
Yes – the average flight time is 9 hours and 34 minutes.
The best price we found for a return flight to Denver International is 430 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
After crunching the numbers on our flight calendar, we found that the cheapest date to fly to Denver International Airport is Monday, 22 September 2025.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Icelandair and Aer Lingus offer the cheapest flight tickets to Denver International.

Flying to Denver International

The things to know before you go.
Cheapest flight found430 €
Cheapest month to flySeptember
Average flight time9 hrs, 34 mins
Most popular airlineAer Lingus
Average flights per week29

Discover Denver International

How to find cheap flights to Denver International Airport (DEN)

  • The cheapest price currently available for a one-way flight to Denver International Airport is 259 €. A round-trip plane ticket to DEN right now is 430 €.

  • Book at the right time with Price Alerts. You'll receive an email or a notification on the app if the price of tickets to DEN changes.

  • Don't wait until the last moment. You're more likely to get the lowest price on tickets to Denver, where Denver International Airport is located, if you book ahead. Airlines usually offer some awesome early bird deals.

  • Select the 'Add nearby airports' filter and expand your search for cheap flights to Denver. This will list all the airports around your departure and arrival points.

  • If there's no rush to travel to Denver, consider making a pit stop along the way. You might find cheaper plane tickets to Denver International Airport by booking a flight with a stop.

Best time to go to Denver

  • The cheapest month to jump on a flight to Denver is usually May.

  • To find the month with the cheapest flights to DEN, use the 'Whole month' tool. If your travel dates are flexible, search for the green prices on the calendar — they show you the lowest available fares.

  • July is the most popular month for flights to DEN. It's the perfect time to experience Denver at its liveliest.

  • April is the quietest period of the year to visit if you're after a slower pace. There's also a good chance you'll find cheaper prices on plane tickets to Denver then.

  • With averages of between 14ºC (57ºF) and 32ºC (90ºF), July is when Denver is warmest. Plan your visit around your weather preferences to get the most out of your time here.

  • Ranging from -9ºC (16ºF) to 7ºC (45ºF), January is when temperatures are at their lowest.

  • With three days of rain on average, November is the driest month in Denver.

  • May brings the wettest conditions. You can expect around ten days of rainfall if that's when you're going.

Travelling to Denver International Airport (DEN): What you need to know

  • Fly to Denver in a single journey. These are some of the popular airlines that offer direct flights to Denver International Airport:

  • Think about booking your DEN plane ticket with Copa. It's the carrier with the fewest delays, with up to 91% of flights into this hub arriving on time.

  • DEN is in the UTC-6 timezone.

  • Baymont by Wyndham Denver International Airport is a comfortable stay within an easy drive of Denver International Airport. Put your feet up here after your flight to DEN.

  • You can pick up a car hire in DEN with top suppliers such as Routes Car Rentals, Dollar and Budget. Hop into the driver's seat and get ready to discover Denver and beyond.

  • If you have a connection out of Denver International Airport or travelling home from there, you're unlikely to be delayed. Up to 80% of all departures from DEN land when they're supposed to.

Getting to central Denver from Denver International Airport (DEN)

Denver highlights

  • Step off your flight to Denver and make your way to these popular attractions:

    • Denver Art Museum: Around 0.32 kilometres south-west of the city centre, this landmark is an ideal spot to start your sightseeing around the city.

    • Elitch Gardens Theme Park: Here's where you can slow the tempo down a little when exploring Denver. You'll find this park roughly 2 kilometres north-west of the centre.

    • Ballpark: Take on this landmark next. Around 2 kilometres north of the city centre, it's worth checking out to get the full Denver experience.

How to get to Fort Collins from Denver International Airport (DEN)

  • Going straight to Fort Collins? From DEN, it'll take around 1 hour 15 minutes to drive there. The city is about 113 kilometres from the airport.

  • Expect a travel time of 1 hour 45 minutes or so when making your way to Fort Collins on public transport.

Travelling from Denver International Airport (DEN) to Centennial

  • If Centennial is on your radar, it's about 32 kilometres from Denver International Airport.

Explore more of the United States

  • Up for more adventures? Colorado Springs will add something special to your trip to the United States. It's about 113 kilometres south of Denver and features Garden of the Gods, Pikes Peak Region Attractions and Red Rock Canyon. The main airport for this city is Colorado Springs Municipal Airport (COS).

  • Aurora is another standout destination in the United States and is roughly 19 kilometres south-west of Denver. Make it a trip to remember with stops at Sagebrush Park, Launch Pad Brewery and Alta Vista Park.

  • Make room for new adventures in Fort Collins. Roughly 88 kilometres north-west of Denver, National Parks & Conservation, Arapaho National Forest and Odell Brewing Company are reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.