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Cheap Flights from Knoxville to Denver International

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      Travellers and cabin class, 1 Adult, Economy
      United
      Southwest Airlines
      Allegiant Air
      SkyWest Airlines

      Compare Knoxville to Denver International flight deals

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

      Book the best Denver International fare with no extra fees

      Flight deals from Knoxville to Denver International

      Looking for a cheap last-minute deal or the best return flight from Knoxville Airport to Denver International Airport? If you want to travel next month, return fares start from $333. Find the lowest prices on one-way and return tickets right here.
      Denver.$202 per passenger.Departing Thu, 5 Nov, returning Thu, 12 Nov.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 5 Nov, arriving in Denver International.Inbound direct flight with Allegiant Air departs from Denver International on Thu, 12 Nov, arriving in Knoxville.Price includes taxes and charges.From $202, select.
      Denver.$228 per passenger.Departing Thu, 29 Oct, returning Thu, 12 Nov.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 29 Oct, arriving in Denver International.Inbound direct flight with Allegiant Air departs from Denver International on Thu, 12 Nov, arriving in Knoxville.Price includes taxes and charges.From $228, select.
      Denver.$333 per passenger.Departing Thu, 15 Oct, returning Sun, 25 Oct.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 15 Oct, arriving in Denver International.Inbound direct flight with Allegiant Air departs from Denver International on Sun, 25 Oct, arriving in Knoxville.Price includes taxes and charges.From $333, select.
      Denver.$398 per passenger.Departing Tue, 19 Jan, returning Tue, 26 Jan.Return flight with United.Outbound direct flight with United departs from Knoxville on Tue, 19 Jan, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 26 Jan, arriving in Knoxville.Price includes taxes and charges.From $398, select.
      Denver.$398 per passenger.Departing Sat, 6 Feb, returning Sat, 13 Feb.Return flight with United.Outbound direct flight with United departs from Knoxville on Sat, 6 Feb, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sat, 13 Feb, arriving in Knoxville.Price includes taxes and charges.From $398, select.
      Denver.$398 per passenger.Departing Sat, 12 Dec, returning Tue, 15 Dec.Return flight with United.Outbound direct flight with United departs from Knoxville on Sat, 12 Dec, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 15 Dec, arriving in Knoxville.Price includes taxes and charges.From $398, select.
      Denver.$398 per passenger.Departing Sat, 30 Jan, returning Sat, 13 Feb.Return flight with United.Outbound direct flight with United departs from Knoxville on Sat, 30 Jan, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sat, 13 Feb, arriving in Knoxville.Price includes taxes and charges.From $398, select.
      Denver.$507 per passenger.Departing Thu, 26 Nov, returning Thu, 3 Dec.Return flight with United.Outbound indirect flight with United, departs from Knoxville on Thu, 26 Nov, arriving in Denver International.Inbound indirect flight with United, departs from Denver International on Thu, 3 Dec, arriving in Knoxville.Price includes taxes and charges.From $507, select.
      Denver.$511 per passenger.Departing Thu, 31 Dec, returning Thu, 7 Jan.Return flight with United.Outbound indirect flight with United, departs from Knoxville on Thu, 31 Dec, arriving in Denver International.Inbound indirect flight with United, departs from Denver International on Thu, 7 Jan, arriving in Knoxville.Price includes taxes and charges.From $511, select.
      Denver.$565 per passenger.Departing Thu, 24 Dec, returning Thu, 7 Jan.Return flight with United.Outbound direct flight with United departs from Knoxville on Thu, 24 Dec, arriving in Denver International.Inbound direct flight with United departs from Denver International on Thu, 7 Jan, arriving in Knoxville.Price includes taxes and charges.From $565, select.
      Denver.$689 per passenger.Departing Tue, 16 Mar, returning Tue, 30 Mar.Return flight with United.Outbound direct flight with United departs from Knoxville on Tue, 16 Mar, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 30 Mar, arriving in Knoxville.Price includes taxes and charges.From $689, select.
      Denver.$696 per passenger.Departing Wed, 19 May, returning Wed, 2 Jun.Return flight with United.Outbound direct flight with United departs from Knoxville on Wed, 19 May, arriving in Denver International.Inbound direct flight with United departs from Denver International on Wed, 2 Jun, arriving in Knoxville.Price includes taxes and charges.From $696, select.
      Denver.$731 per passenger.Departing Thu, 29 Apr, returning Sun, 9 May.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Knoxville on Thu, 29 Apr, arriving in Denver International.Inbound direct flight with Southwest Airlines departs from Denver International on Sun, 9 May, arriving in Knoxville.Price includes taxes and charges.From $731, select.
      Denver.$731 per passenger.Departing Thu, 6 May, returning Sun, 9 May.Return flight with United.Outbound direct flight with United departs from Knoxville on Thu, 6 May, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 9 May, arriving in Knoxville.Price includes taxes and charges.From $731, select.
      Denver.$732 per passenger.Departing Mon, 26 Jul, returning Sat, 31 Jul.Return flight with United.Outbound direct flight with United departs from Knoxville on Mon, 26 Jul, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sat, 31 Jul, arriving in Knoxville.Price includes taxes and charges.From $732, select.
      Denver.$736 per passenger.Departing Fri, 20 Nov, returning Sun, 6 Dec.Return flight with United.Outbound direct flight with United departs from Knoxville on Fri, 20 Nov, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sun, 6 Dec, arriving in Knoxville.Price includes taxes and charges.From $736, select.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Knoxville to Denver International found in the last 4 days, and are subject to change and availability.

      Find the cheapest month to fly from Knoxville to Denver International

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Knoxville to Denver International flights are currently cheapest in November.
      Sep
      from $1,420
      Oct
      from $333
      Nov
      from $202
      Dec
      from $398
      Jan
      from $398
      Feb
      from $398
      Mar
      from $689
      Apr
      Find prices
      May
      from $731
      Jun
      from $765
      Jul
      from $732
      Aug
      from $762

      Direct flights from Knoxville to Denver International

      Allegiant Air
      SkyWest Airlines
      Southwest Airlines
      United

      Knoxville to Denver International: Alternative routes

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

      Denver International

      30km from central Denver
      ClosestCheapest
      from $202
      Search flights

      Knoxville to Denver: Flight information

      The things to know before you go.
      Cheapest flight found$202
      Cheapest month to flyNovember
      Average flight time3 hrs, 24 mins
      Most popular airlineUnited
      Average flights per week26

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

      The best price we found for a return flight from Knoxville to Denver International is $202. 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.
      3 hours and 24 minutes is the average flight time from Knoxville to Denver International.
      United, Southwest Airlines and Allegiant Air fly direct from Knoxville to Denver International.
      As of September 2026, there are 26 flights per week flying from Knoxville to Denver International.
      The cheapest month to fly from Knoxville to Denver 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 Denver International Airport on Thursday, 5 November 2026.
      Yes – the average flight time is 3 hours and 24 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 Denver 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 Denver 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 Denver International.

      Travelling from Knoxville Airport (TYS) to Denver International Airport (DEN): what you need to know

      • Jump on a direct flight from Knoxville Airport to Denver International Airport and you'll be travelling for an average of 3 hours 20 minutes.

      • Denver's timezone is UTC-7, which makes Denver two hours behind Knoxville.

      • There are 19 Knoxville Airport to Denver International Airport flights each week.

      • Get to the airport on time so you don't miss your TYS to DEN flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

      • During popular months like October, it's a good idea to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead of an international flight when you travel during a high season in general.

      • You can travel nonstop to Denver, the United States. Take off with one of these carriers that operate direct flights from Knoxville Airport to Denver International Airport:

      • United is the airline most travellers choose for this route.

      • United stands out as the most punctual carrier for TYS to DEN flights, with 89.33% of its services reaching their destination on schedule.

      How to find the cheapest flights from Knoxville Airport (TYS) to Denver International Airport (DEN)

      • Right now, $101 is the cheapest price we've found for a one-way Knoxville Airport to Denver International Airport flight. The best price for a return ticket is $202. Remember that fares can change due to demand when booking.

      • Book four months before travelling. After crunching the numbers on our calendar, this is how far you'll want to book ahead to find cheap tickets from TYS to DEN.

      • The cheapest month for flights from Knoxville Airport to Denver International Airport is September. Use the 'Whole month' tool to see the lowest airfares if you have a flexible travel schedule.

      • Picking up cheap flights from TYS to DEN is a piece of cake with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know when fares go down.

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

      Handy information about Knoxville Airport (TYS)

      • You'll find TYS at 2055 Alcoa Highway.

      • Of all flights departing from Knoxville Airport, 76% arrive as scheduled at their destination.

      • Knoxville Airport is around 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.

      • The journey on public transport takes roughly 50 minutes.

      • Have an early flight from Knoxville Airport to Denver International Airport? Avoid the stress of rushing to the airport (and catch some extra z's) by picking one of these hotels close to TYS:

      Arriving at Denver International Airport (DEN)

      • Hop off your Knoxville Airport to Denver International Airport flight and be snoozing in your hotel bed shortly after. If you want a comfy option a short journey from DEN, stay at Baymont by Wyndham Denver International Airport.

      • Begin your adventure by picking up a Denver International Airport rental car. Grab a set of wheels from Routes Car Rentals, Dollar or Budget and explore beyond Denver's main sights.

      • Booking your vehicle from Denver International Airport about one week in advance gives you the best chance of locking in a great deal.

      When to fly to Denver International Airport (DEN)

      • The quietest month for a flight from Knoxville Airport to Denver International Airport is January, while July is the busiest. Choose the best time to go to Denver based on whether you prefer a bustling atmosphere or a more laid-back vibe.

      • Lock in your flight from Knoxville Airport to Denver International Airport for July if you'd like to visit Denver during its warmest month. You can expect temperatures of between 14ºC and 32ºC.

      • If you want to travel in cooler conditions, search for a cheap ticket from TYS to DEN in January. Temperatures average between -9ºC and 7ºC then.

      Explore more of the United States

      • You've seen Denver, now it's time to explore more of the United States. Travel around 105 kilometres south to Colorado Springs to check off its popular sights. From Garden of the Gods to Pikes Peak Region Attractions and Red Rock Canyon, your itinerary will be busy.

      • Around 13 kilometres east of Denver, Aurora is another favourite stop in the United States. Get a taste of what this destination has to offer at Plains Conservation Centre, DeLaney Homestead Historic District and Aircraft viewing.

      Plan the rest of your trip from Knoxville to Denver

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