$104 Cheap Frontier Airlines flights Philadelphia (PHL) to Phoenix (PHX)

Use the “Price (lowest to highest)” filter on Expedia to look for cheap Frontier Airlines round-trip flights from $203 from PHL to PHX. Affordable one-way options from $104 are also on offer.**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.

Look for one-way or return flights to Phoenix in July or August. You could find lower fares with Frontier Airlines during these off-peak times.

To find cheap Frontier Airlines fares from Philadelphia Intl. Airport (PHL) to Sky Harbor Intl. Airport (PHX), start searching one to three months before your planned departure. Securing 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 influence what you pay. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking 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 journey from PHL to PHX with Frontier Airlines or another airline, check the “Nonstop” box when looking for tickets.

To find the earliest departure from PHL to PHX with Frontier Airlines, sort your results by “Morning” and “Early Morning.” Booking 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.

Sky Harbor Intl. Airport (PHX) is the main Phoenix gateway for Frontier Airlines flights from Philadelphia Intl. Airport (PHL).

Depart from PHL 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 could also earn OneKeyCash™* to spend 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 your fare type, a fee generally applies if you change or cancel your flight more than 24 hours after it’s confirmed. To find plane tickets with more flexibility, select our “Changes included” and “No cancel fee” boxes while searching for flights. For more details on modifying or canceling your reservation, go to “Trips,” select your flight and click on “Manage Booking.”