$83 Cheap Frontier Airlines flights Trenton (TTN) to Denver (DEN)

Finding cheap one-way Frontier Airlines flights from TTN to DEN from $83 on Expedia is easy — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares from $154 for your next getaway.**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 one-way or return flights to Denver in January or November. You could find a cheap fare with Frontier Airlines during these off-peak months.

Look for cheap Frontier Airlines flights from Mercer Airport (TTN) to Denver Intl. Airport (DEN) one to three months ahead of your departure. 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 class and journey, the best day to book a domestic flight is usually Sunday and the most expensive is typically 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.

Enter your dates, click search and check the “Nonstop” filter on Expedia to find any direct flights from TTN to DEN with Frontier Airlines or other carriers.

Filter your results by “Early Morning” and “Morning” to see the earliest flights from TTN to DEN. Taking off early means you’re 20% 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.

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

A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to fly from TTN to DEN with Frontier Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* in addition to Frontier Airlines’s loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee may apply if you cancel or change your booking more than 24 hours after confirmation. To secure tickets with more flexibility, select our “No cancel fee” or “Changes included” filter when searching for flights. For more information on modifying or canceling your reservation, head to “Trips,” select your flight and tick “Manage Booking.”