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$52 Cheap Flights from Knoxville to Jacksonville International

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      Travellers and cabin class, 1 Adult, Economy
      Allegiant Air

      Compare Knoxville to Jacksonville International flight deals

      Find the cheapest month or even day of the year to fly to Jacksonville International

      Book the best Jacksonville International fare with no extra fees

      Flight deals from Knoxville to Jacksonville International

      Looking for a cheap last-minute deal or the best return flight from Knoxville Airport to Jacksonville International Airport? If you want to travel next month, return fares start from $120. Find the lowest prices on one-way and return tickets right here.
      Jacksonville.$52 per passenger.Departing Thu, 12 Nov.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 12 Nov, arriving in Jacksonville International.Price includes taxes and charges.From $52, select.
      Jacksonville.$52 per passenger.Departing Thu, 17 Sep.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 17 Sep, arriving in Jacksonville International.Price includes taxes and charges.From $52, select.
      Jacksonville.$55 per passenger.Departing Thu, 29 Oct.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 29 Oct, arriving in Jacksonville International.Price includes taxes and charges.From $55, select.
      Jacksonville.$65 per passenger.Departing Thu, 17 Dec.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 17 Dec, arriving in Jacksonville International.Price includes taxes and charges.From $65, select.
      Jacksonville.$85 per passenger.Departing Sun, 14 Mar.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Sun, 14 Mar, arriving in Jacksonville International.Price includes taxes and charges.From $85, select.

      Find the cheapest month to fly from Knoxville to Jacksonville International

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Knoxville to Jacksonville International flights are currently cheapest in September.
      Aug
      Find prices
      Sep
      from $52
      Oct
      from $55
      Nov
      from $52
      Dec
      from $65
      Jan
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      Feb
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      Mar
      from $85
      Apr
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      May
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      Jun
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      Jul
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      Direct flights from Knoxville to Jacksonville International

      Allegiant Air

      Knoxville to Jacksonville International: Alternative routes

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

      Jacksonville International

      19km from central Jacksonville
      ClosestCheapest
      from $52
      Search flights

      Knoxville to Jacksonville: Flight information

      The things to know before you go.
      Cheapest flight found$52
      Cheapest month to flyNovember
      Average flight time1 hr, 23 mins
      Most popular airlineAllegiant Air
      Average flights per week3

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

      The best price we found for a return flight from Knoxville to Jacksonville International is $101. 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.
      1 hour and 23 minutes is the average flight time from Knoxville to Jacksonville International.
      Allegiant Air flies direct from Knoxville to Jacksonville International.
      As of August 2026, there are 3 flights per week flying from Knoxville to Jacksonville International.
      The cheapest month to fly from Knoxville to Jacksonville International is usually November.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Knoxville Airport to Jacksonville International Airport on Thursday, 12 November 2026.
      Yes – the average flight time is 1 hour and 23 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 Jacksonville International 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 Jacksonville 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 Jacksonville International.

      Flying from Knoxville Airport (TYS) to Jacksonville International Airport (JAX): what you need to know

      • Around 1 hour 20 minutes is how long you'll be travelling on a direct flight from Knoxville Airport to Jacksonville International Airport.

      • Knoxville and Jacksonville are in the same timezone, UTC-5.

      • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules to live by. Get to the airport on time to board your TYS to JAX flight.

      • You'll likely experience longer queues during popular months such as October. Arriving up to four hours ahead of an international flight and two hours for domestic departures will help ensure a smooth travel experience.

      • Allegiant Air offers direct flights from Knoxville Airport to Jacksonville International Airport. Book with this popular carrier, then get ready to discover the sights in Jacksonville — and maybe even more of the United States if time allows.

      • Allegiant Air has the highest passenger demand on this route.

      • With 78.95% of services landing as planned, Allegiant Air is the most punctual carrier operating TYS to JAX flights.

      How to find the cheapest flights from Knoxville Airport (TYS) to Jacksonville International Airport (JAX)

      • The cheapest price we've seen for a one-way Knoxville Airport to Jacksonville International Airport flight is $52. A round-trip plane ticket right now is $101. Depending on the availability and when you book, these fares may change.

      • Get cheap tickets from TYS to JAX by booking at least two months ahead. Based on our research, that's the sweet spot for bagging a bargain.

      • July is the cheapest month for flights from Knoxville Airport to Jacksonville International Airport. If you want to fly during a different time of year, the 'Whole month' tool will show you the lowest airfares for each month.

      • Landing cheap flights from TYS to JAX is a cinch with Price Alerts. Simply create one of these automatic alerts and we'll notify you when a new deal comes up.

      • Discover the right flight for you with the help of the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Knoxville Airport to Jacksonville International Airport, use the 'Sort by' function. You can also filter results by departure and arrival times, airline, and number of stops.

      Handy information about Knoxville Airport (TYS)

      • You'll find TYS at 2055 Alcoa Highway.

      • When it comes to the on-time performance of Knoxville Airport, data shows 76% of flights stick to their scheduled arrival time.

      • Knoxville Airport is about 24 kilometres from central Knoxville. If you're driving, ride-sharing or catching a taxi from the centre, it'll take you 25 minutes or so to get there, depending on the traffic.

      • You can expect a trip time of about 50 minutes when using public transport.

      • Get your journey off to a leisurely start by staying near TYS. Whether you're boarding an early flight from Knoxville Airport to Jacksonville International Airport or just don't want to be rushed, these hotels are ideal:

      Arriving at Jacksonville International Airport (JAX)

      Getting from Jacksonville International Airport (JAX) to central Jacksonville

      • You'll find JAX at 2400 Yankee Clipper Drive.

      • From Jacksonville International Airport, Jacksonville is approximately 29 kilometres away. It takes around 25 minutes to reach the centre driving.

      • Getting there by public transport takes around 1 hour 15 minutes.

      When to fly to Jacksonville International Airport (JAX)

      • It's time to pick your dates for your flight from Knoxville Airport to Jacksonville International Airport. July is the most popular month to head to Jacksonville. If you prefer a more relaxed vibe, go in March.

      • The warmest month in Jacksonville is July, with the temperature ranging between 23ºC (73ºF) and 34ºC (93ºF). Book your flights from Knoxville Airport to Jacksonville International Airport in this month if you enjoy this type of weather.

      • Look for cheap tickets from TYS to JAX in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 5ºC (41ºF) and 21ºC (70ºF) on average.

      Explore more of the United States

      • You've done Jacksonville, now it's time to explore more of the United States. Travel around 467 kilometres north-west to Atlanta to check off its leading sights. From Georgia Aquarium to Birth Home of Martin Luther King, Jr and Fox Theatre, you've got a jam-packed schedule ahead.

      • Tampa is another standout destination in the United States and is around 274 kilometres south of Jacksonville. No journey is complete without a visit to Busch Gardens Tampa, The Florida Aquarium and ZooTampa at Lowry Park.

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