$104 Cheap Frontier Airlines flights Trenton (TTN) to Phoenix (PHX)

Landing cheap one-way Frontier Airlines flights from TTN to PHX from $104 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $188 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.

Browse for one-way or round-trip flights to Phoenix in July or August. You could find lower fares with Frontier Airlines during these off-peak months.

For cheap Frontier Airlines fares from Mercer Airport (TTN) to Sky Harbor Intl. Airport (PHX), start searching one to three months before your planned 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 how much you pay. 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 trip 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.

To find out if there’s a direct route from TTN to PHX with Frontier Airlines or any other airlines, use our “Nonstop” filter when searching for flights.

To find the earliest departure from TTN to PHX with Frontier Airlines, filter your search by “Early Morning” and “Morning.” Choosing an early flight generally means 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.

Take a Frontier Airlines flight from Mercer Airport (TTN) to Phoenix, and you’ll most likely touch down at Sky Harbor Intl. Airport (PHX). This is the airline’s main hub in this destination.

Travel from TTN to PHX with Frontier Airlines and you’ll enjoy a range of benefits including a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you may also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee typically applies if you change or cancel your booking more than 24 hours after it’s confirmed. To secure flexible fares, select our “Changes included” or “No cancel fee” filter when you search for flights. For more details on modifying or canceling your reservation, go to “Trips,” select your flight and tick “Manage Booking.”