$151 Cheap Frontier Airlines flights Jacksonville (JAX) to Denver (DEN)

Finding cheap one-way Frontier Airlines flights from JAX to DEN from $151 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $290 for your next exciting vacation.**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.

January is one of the most affordable months to travel to Denver with Frontier Airlines. You could also find great deals on one-way and return tickets in November.

Look for affordable Frontier Airlines flights from Jacksonville Intl. Airport (JAX) to Denver Intl. Airport (DEN) one to three months prior to your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the ideal day to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

Click on our “Nonstop” filter when browsing for direct Frontier Airlines flights from JAX to DEN. It’s also a great way to compare other airlines servicing the same nonstop journey.

Sort your results by “Morning” and “Early Morning” to find the earliest flights from JAX to DEN. Heading off early means you’re less likely to experience 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.

Jump on a Frontier Airlines flight from Jacksonville Intl. Airport (JAX) to Denver, and you’ll likely arrive at Denver Intl. Airport (DEN). This is the airline’s primary hub in this destination.

Offering a rewarding loyalty program, Frontier Airlines is a top choice for many passengers journeying from JAX to DEN. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you could 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.

Changes are often free within 24 hours of making your booking, but your airline may charge a fee after that. For further information about modifying your reservation, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to change your plans without additional charges, apply the “No cancel fee” or “Changes included” filter when planning your next escape.