$54 Cheap Frontier Airlines flights Portland (PDX) to Denver (DEN)

Apply the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines return flights from $108 from PDX to DEN. Affordable one-way tickets from $54 are available as well.**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.

Frontier Airlines flights to Denver are often cheaper in the quieter months of January and November. Whether you’re searching for a one-way or round-trip ticket, you could find a better deal then.

To find cheap Frontier Airlines fares from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN), start searching one to three months before your intended departure. Reserving 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 affect the cost. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey 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.

Depart on one of Frontier Airlines’s 7 weekly direct flights from Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN). To see your choices, enter your origin, destination and dates and hit search. Next, apply the “Nonstop” and “Airline” filters.

Depart Portland Intl. Airport (PDX) for Denver Intl. Airport (DEN) on a nonstop Frontier Airlines flight, and you’ll be in the skies for about 2h 34m.

The earliest Frontier Airlines flight from PDX to DEN takes off at 7:35AM UTC-8, touching down at 11:10AM UTC-7. If you want to set off later, the last Frontier Airlines flight leaves PDX at 12:03PM UTC-8 and lands at DEN at 3:37PM UTC-7. Flying before midday is often a smart choice as morning and mid-morning flights are least likely to face cancellations.**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.

Denver Intl. Airport (DEN) is the primary Denver hub for Frontier Airlines flights from Portland Intl. Airport (PDX).

Fly from PDX to DEN with Frontier Airlines and enjoy a range of benefits starting with a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you can also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

For the Portland Intl. Airport (PDX) to Denver Intl. Airport (DEN) route, Frontier Airlines typically flies Airbus A321neo and Airbus A320neo planes. Remember that last-minute changes can occur for operational reasons, so your flight could be on another aircraft.

Changes are often free within 24 hours of making a booking, but your airline may charge you after that. For more details about modifying your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to make changes without extra charges, check the “Changes included” and “No cancel fee” filters when organizing your next break.