$100 Cheap Frontier Airlines flights Trenton (TTN) to Raleigh (RDU)

Scoring cheap one-way Frontier Airlines flights from TTN to RDU from $100 on Expedia is a breeze — just filter by "Price (lowest to highest)." Or check out our affordable return fares from $158 for your next adventure.**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.

Begin your search one to three months ahead of your travel date to score cheaper fares on Frontier Airlines flights from Mercer Airport (TTN) to Raleigh - Durham Intl. Airport (RDU). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic trips.*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.

Sort your results by "Morning" and "Early Morning" to browse the earliest flights from TTN to RDU. Setting off early means flight cancellations are less likely.**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.

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to travel from TTN to RDU with Frontier Airlines. Plus, when you join Expedia's free One Key™ program, you can receive OneKeyCash™* in addition to Frontier Airlines's loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.