$44 Cheap Frontier Airlines flights Phoenix (PHX) to Denver (DEN)

Use the “Price (lowest to highest)” filter on Expedia to search for cheap Frontier Airlines return flights from $83 from PHX to DEN. Affordable one-way tickets from $44 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for round-trip or one-way flights to Denver in January or November. You could find a cheap fare with Frontier Airlines during these off-peak months.

For cheap Frontier Airlines fares from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall cost. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

You can easily fly from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) on any of Frontier Airlines’s 30 weekly direct flights. Use our “Nonstop” and “Airline” filters to find the Frontier Airlines flight that’ll arrive at DEN at your preferred time.

It takes approximately 1h 55m to fly nonstop from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) with Frontier Airlines.

If flexibility is what you’re after, Saturday offers the most choice for Frontier Airlines flights from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN). Take your pick of 5 different departures.

The earliest flight from PHX to DEN with Frontier Airlines leaves at 6:00AM UTC-7. You’ll touch down at 7:56AM UTC-7. The last Frontier Airlines flight of the day leaves at 10:29PM UTC-7 and arrives at 12:23AM UTC-7. With approximately 20% fewer cancellations for early and mid-morning flights, heading out early is often the best choice.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Frontier Airlines flights from Sky Harbor Intl. Airport (PHX) to Denver touch down at Denver Intl. Airport (DEN). This is the main gateway to this destination.

Offering a rewarding loyalty program, Frontier Airlines is a top pick for many passengers heading from PHX to DEN. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be onboard an Airbus A321neo or an Airbus A320neo when flying Frontier Airlines from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN). However, keep in mind that a different aircraft may be assigned depending on operational factors.

Changes are typically free within 24 hours of making a booking, but your airline may charge a fee after that. For further information about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to adjust your plans without being charged, check the “Changes included” and “No cancel fee” filters when planning your next getaway.