Cheap flights from Philadelphia to Knoxville from $39

The month of July is, on average, the cheapest month to fly to Knoxville from Philadelphia, with most prices found around $411. If you aren’t able to travel during the month of July, then book flights to Knoxville from Philadelphia during August instead. Flights to Knoxville in August, while not as cheap as those in July, still average around $447.

The cheapest day to depart from Philadelphia to Knoxville is on a Wednesday. Travelers who choose to depart for Knoxville on a Wednesday will often find tickets for as low as $411. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to Knoxville for around $614.

In the evening is the cheapest time of day to fly from Philadelphia to Knoxville when you can find flight prices for as low as $447. Flying to Knoxville in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the afternoon when prices are around $473.

Fly from Philadelphia to Knoxville McGhee Tyson for the best Philadelphia - Knoxville McGhee Tyson flight prices

You are more likely to see cheaper flights to Knoxville from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $478 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Philadelphia for as low as $367 on momondo.

There are 3 cabin classes available to choose from on Philadelphia to Knoxville McGhee Tyson flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Philadelphia to Knoxville.

Southwest is the most popular carrier operating from Philadelphia to Knoxville McGhee Tyson

American Airlines, Allegiant Air and Delta are the top three most popular airlines that fly to Knoxville from Philadelphia according to our data. American Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Knoxville. Keep in mind that there are 5 different airlines that fly to Knoxville on a routine basis, so you have a few additional options to choose from.

As of February 2026, there are 4 flights per day flying from Philadelphia to Knoxville. The most common time of day flights depart is 6:00PM, with 61% of flights taking off in the evening.

28 flights are operational weekly from Philadelphia to Knoxville as of February 2026. The most popular departure day for this route is Thu, with 21% of flights per week taking off on this day.