$90 Cheap Frontier Airlines flights Raleigh (RDU) to Trenton (TTN)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap Frontier Airlines round-trip flights from $180 from RDU to TTN. Affordable one-way options from $90 are available too.**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.

February is one of the least expensive months to get away to Trenton with Frontier Airlines. You could also find excellent prices on one-way and return tickets in January.

For cheap Frontier Airlines fares from Raleigh - Durham Intl. Airport (RDU) to Mercer Airport (TTN), 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 impact the cost. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight 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.

Simply enter your dates, press search and check the “Nonstop” filter on Expedia to find any direct flights from RDU to TTN with Frontier Airlines or another airline.

Filter your results by “Early Morning” and “Morning” to browse the earliest departures from RDU to TTN. Heading 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.

Take a Frontier Airlines flight from Raleigh - Durham Intl. Airport (RDU) to Trenton, and you’ll most likely touch down at Mercer Airport (TTN). This is the airline’s primary hub here.

Offering a rewarding loyalty program, Frontier Airlines is a top pick for many passengers flying from RDU to TTN. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with 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 booking, but your airline may charge a fee after that time. For further details about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to adjust your plans without additional costs, tick the “Changes included” or “No cancel fee” filter when planning your next getaway.