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Cheap Flights from Philadelphia (PHL) to Knoxville (TYS)

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      American Airlines
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      Compare Philadelphia International to Knoxville flight deals

      Find the cheapest month or even day of the year to fly to Knoxville

      Book the best Knoxville fare with no extra fees

      Flight deals from Philadelphia International to Knoxville

      Looking for a cheap last-minute deal or the best return flight from Philadelphia International Airport to Knoxville Airport? If you want to travel next month, return fares start from $136. Find the lowest prices on one-way and return tickets right here.
      Knoxville.$109 per passenger.Departing Fri, 22 Jan, returning Mon, 8 Feb.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 22 Jan, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 8 Feb, arriving in Philadelphia International.Price includes taxes and charges.From $109, select.
      Knoxville.$116 per passenger.Departing Fri, 5 Feb, returning Mon, 8 Feb.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 5 Feb, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 8 Feb, arriving in Philadelphia International.Price includes taxes and charges.From $116, select.
      Knoxville.$130 per passenger.Departing Fri, 4 Dec, returning Mon, 7 Dec.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 4 Dec, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 7 Dec, arriving in Philadelphia International.Price includes taxes and charges.From $130, select.
      Knoxville.$136 per passenger.Departing Mon, 19 Oct, returning Fri, 23 Oct.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 19 Oct, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 23 Oct, arriving in Philadelphia International.Price includes taxes and charges.From $136, select.
      Knoxville.$138 per passenger.Departing Fri, 8 Jan, returning Fri, 22 Jan.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 8 Jan, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 22 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $138, select.
      Knoxville.$148 per passenger.Departing Mon, 16 Nov, returning Mon, 7 Dec.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 16 Nov, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 7 Dec, arriving in Philadelphia International.Price includes taxes and charges.From $148, select.
      Knoxville.$153 per passenger.Departing Mon, 26 Oct, returning Fri, 13 Nov.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 26 Oct, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 13 Nov, arriving in Philadelphia International.Price includes taxes and charges.From $153, select.
      Knoxville.$153 per passenger.Departing Mon, 21 Sep, returning Fri, 9 Oct.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 21 Sep, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 9 Oct, arriving in Philadelphia International.Price includes taxes and charges.From $153, select.
      Knoxville.$153 per passenger.Departing Mon, 9 Nov, returning Fri, 13 Nov.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 9 Nov, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 13 Nov, arriving in Philadelphia International.Price includes taxes and charges.From $153, select.
      Knoxville.$157 per passenger.Departing Fri, 18 Dec, returning Fri, 8 Jan.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 18 Dec, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 8 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $157, select.
      Knoxville.$163 per passenger.Departing Fri, 9 Apr, returning Mon, 12 Apr.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 9 Apr, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 12 Apr, arriving in Philadelphia International.Price includes taxes and charges.From $163, select.
      Knoxville.$195 per passenger.Departing Fri, 26 Feb, returning Mon, 8 Mar.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 26 Feb, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 8 Mar, arriving in Philadelphia International.Price includes taxes and charges.From $195, select.
      Knoxville.$203 per passenger.Departing Mon, 10 May, returning Mon, 17 May.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 10 May, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 17 May, arriving in Philadelphia International.Price includes taxes and charges.From $203, select.
      Knoxville.$214 per passenger.Departing Mon, 14 Sep, returning Fri, 18 Sep.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Mon, 14 Sep, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 18 Sep, arriving in Philadelphia International.Price includes taxes and charges.From $214, select.
      Knoxville.$242 per passenger.Departing Fri, 26 Mar, returning Mon, 12 Apr.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 26 Mar, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Mon, 12 Apr, arriving in Philadelphia International.Price includes taxes and charges.From $242, select.
      Knoxville.$299 per passenger.Departing Fri, 12 Mar, returning Fri, 26 Mar.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Philadelphia International on Fri, 12 Mar, arriving in Knoxville.Inbound direct flight with Allegiant Air departs from Knoxville on Fri, 26 Mar, arriving in Philadelphia International.Price includes taxes and charges.From $299, select.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Philadelphia International to Knoxville found in the last 4 days, and are subject to change and availability.

      Find the cheapest month to fly from Philadelphia International to Knoxville

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Knoxville flights are currently cheapest in February.
      Sep
      from $214
      Oct
      from $136
      Nov
      from $153
      Dec
      from $130
      Jan
      from $138
      Feb
      from $116
      Mar
      from $299
      Apr
      from $163
      May
      from $203
      Jun
      from $765
      Jul
      Find prices
      Aug
      Find prices

      Direct flights from Philadelphia International to Knoxville

      Allegiant Air
      American Airlines
      British Airways
      Piedmont Airlines
      PSA Airlines
      Qatar Airways
      Republic Airways

      Philadelphia International to Knoxville: Alternative routes

      Compare routes from Philadelphia International to Knoxville below. You may find an airport to fly into that's cheaper, faster, or easier than Knoxville.

      Knoxville

      18km from central Knoxville
      ClosestCheapest
      from $109
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      Philadelphia to Knoxville: Flight information

      The things to know before you go.
      Cheapest flight found$109
      Cheapest month to flyJanuary
      Average flight time2 hrs, 9 mins
      Most popular airlineAmerican Airlines
      Average flights per week80

      Finding cheap flights from Philadelphia International to Knoxville: Frequently asked questions

      The best price we found for a return flight from Philadelphia International to Knoxville is $109. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      2 hours and 9 minutes is the average flight time from Philadelphia International to Knoxville.
      American Airlines, British Airways and Piedmont Airlines fly direct from Philadelphia International to Knoxville.
      As of September 2026, there are 80 flights per week flying from Philadelphia International to Knoxville.
      The cheapest month to fly from Philadelphia International to Knoxville is usually January.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Knoxville Airport on Friday, 22 January 2027.
      Yes – the average flight time is 2 hours and 9 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Knoxville but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Knoxville is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Allegiant Air offers the cheapest flight tickets to Knoxville.

      Flying from Philadelphia International Airport (PHL) to Knoxville Airport (TYS): what you need to know

      • Jump on a direct flight from Philadelphia International Airport to Knoxville Airport and you'll be travelling for an average of 2 hours 10 minutes.

      • Pack your suitcase and choose from 20 weekly Philadelphia International Airport to Knoxville Airport flights.

      • For a stress-free journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This way, you'll have plenty of time to board your PHL to TYS flight.

      • Travelling during a peak month such as August? Major public holidays and other popular seasons can mean longer queues and delays at security. Be extra cautious and get there up to four hours ahead of an international flight and two hours before a domestic departure.

      • Jetting into Knoxville (and then seeing more of the United States!) is easy with American Airlines. This popular airline has direct flights from Philadelphia International Airport to Knoxville Airport.

      • American Airlines has the highest passenger demand on this route.

      • The most punctual carrier that operates PHL to TYS flights is American Airlines. Its services arrive without delay 76.32% of the time.

      • Think about adding a stopover when booking your ticket from Philadelphia International Airport to Knoxville Airport. Just uncheck 'Direct flights only' to break up your journey, or visit a new city along the way. Here are some options between PHL and TYS:

        • Atlanta Hartsfield-Jackson Airport

        • Charlotte Douglas Airport

        • Washington Dulles Airport

      Handy information about Philadelphia International Airport (PHL)

      • You'll find PHL at 8500 Essington Ave.

      • 77% of flights leaving from Philadelphia International Airport land at their destination on time.

      • To get to Philadelphia International Airport from central Philadelphia, it takes around 20 minutes if you're travelling by car. Of course, this depends on traffic conditions. It's approximately 18 kilometres from the airport to the city centre.

      • The trip when using public transport takes about 30 minutes.

      • Looking for a handy hotel close to PHL? If you're catching an early flight from Philadelphia International Airport to Knoxville Airport, these accommodation options will have you sleeping moments from your departure lounge:

      Arriving at Knoxville Airport (TYS)

      • The last thing you want is a long journey to your hotel if you're getting in late on a Philadelphia International Airport to Knoxville Airport flight. Reserve one of these accommodation options near TYS instead:

      • Grab a Knoxville Airport rental car and discover Knoxville and beyond with your own set of wheels. Budget, Alamo and Avis are popular outlets to choose from here.

      • Get the best deal by reserving your vehicle from Knoxville Airport around three weeks ahead of your departure.

      When to fly to Knoxville Airport (TYS)

      • The quietest month for a flight from Philadelphia International Airport to Knoxville Airport is March, while October is the most popular. Pick the best time to visit Knoxville based on whether you prefer a more relaxed vibe or a faster pace.

      • The warmest month in Knoxville is July, with the temperature ranging between 17ºC (63ºF) and 32ºC (90ºF). Book your flights from Philadelphia International Airport to Knoxville Airport in this month if you enjoy this type of weather.

      • January has average temperatures of between -6ºC (21ºF) and 11ºC (52ºF). Look for cheap tickets from PHL to TYS sometime around then if you want to travel in cooler conditions.

      Explore more of the United States

      • You've seen Knoxville, now it's time to explore other corners of the United States. Travel around 451 kilometres north to Columbus to check off its leading attractions. From Franklin Park Conservatory and Botanical Gardens to Whetstone Park / Park of Roses and Ohio Theatre, your itinerary will be busy.

      • If you're ready to explore another major destination in the United States, head for Indianapolis, roughly 467 kilometres north-west of Knoxville. Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis are highlights.

      Plan smart, explore more

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      Plan the rest of your trip from Philadelphia to Knoxville

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.