$167 Cheap Frontier Airlines flights Philadelphia (PHL) to Knoxville (TYS)

Landing cheap one-way Frontier Airlines flights from PHL to TYS from $167 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares from $314 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.

Frontier Airlines flights to Knoxville are typically more affordable in the off-peak months of January and December. Whether you’re in search of a one-way or a return ticket, you could score a better deal then.

Start searching one to three months before your departure to find cheap fares on Frontier Airlines flights from Philadelphia Intl. Airport (PHL) to McGhee Tyson Airport (TYS). 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 flights.*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 figure out if there’s a direct route from PHL to TYS with Frontier Airlines or any other airlines, use our “Nonstop” filter when searching for tickets.

Search Frontier Airlines’s earliest flights from PHL to TYS by using the “Early Morning” and “Morning” filters. Not only will you get to your destination sooner, early departures also have a 20% less chance of being canceled.**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.

Hop on a Frontier Airlines flight from Philadelphia Intl. Airport (PHL) to Knoxville, and you’ll likely come in to McGhee Tyson Airport (TYS). This is the airline’s main hub in this city.

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to leave from PHL to TYS with Frontier Airlines. Plus, when you sign up to Expedia’s free One Key™ program, you can earn OneKeyCash™* alongside any airline loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making a booking, but your airline may add a charge after that. For more details about altering your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to update your itinerary without extra charges, check the “Changes included” and “No cancel fee” filters when planning your next adventure.