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Cheap flights from Knoxville to Denver International

Compare Knoxville to Denver International flight deals

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Flight deals from Knoxville to Denver International

Looking for a cheap last-minute deal or the best round-trip flight from Knoxville Airport to Denver International Airport? If you want to travel next month, round-trip fares start from $114. Find the lowest prices on one-way and round-trip tickets right here.
Denver.$102 per passenger.Departing Sun, Sep 27, returning Sun, Oct 4.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Sun, Sep 27, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Sun, Oct 4, arriving in Knoxville.Price includes taxes and charges.From $102, select.
Denver.$106 per passenger.Departing Sun, Sep 6, returning Thu, Sep 17.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Sun, Sep 6, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Thu, Sep 17, arriving in Knoxville.Price includes taxes and charges.From $106, select.
Denver.$109 per passenger.Departing Sun, Oct 25, returning Thu, Oct 29.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Sun, Oct 25, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Thu, Oct 29, arriving in Knoxville.Price includes taxes and charges.From $109, select.
Denver.$110 per passenger.Departing Thu, Nov 5, returning Sun, Nov 8.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Thu, Nov 5, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Sun, Nov 8, arriving in Knoxville.Price includes taxes and charges.From $110, select.
Denver.$110 per passenger.Departing Sun, Aug 23, returning Thu, Sep 3.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Sun, Aug 23, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Thu, Sep 3, arriving in Knoxville.Price includes taxes and charges.From $110, select.
Denver.$114 per passenger.Departing Sun, Aug 16, returning Sun, Aug 23.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Sun, Aug 16, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Sun, Aug 23, arriving in Knoxville.Price includes taxes and charges.From $114, select.
Denver.$114 per passenger.Departing Thu, Oct 29, returning Sun, Nov 8.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Thu, Oct 29, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Sun, Nov 8, arriving in Knoxville.Price includes taxes and charges.From $114, select.
Denver.$184 per passenger.Departing Thu, Jul 30, returning Thu, Aug 13.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Thu, Jul 30, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Thu, Aug 13, arriving in Knoxville.Price includes taxes and charges.From $184, select.
Denver.$192 per passenger.Departing Thu, Jul 23, returning Thu, Jul 30.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Thu, Jul 23, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Thu, Jul 30, arriving in Knoxville.Price includes taxes and charges.From $192, select.
Denver.$334 per passenger.Departing Sat, Dec 12, returning Fri, Dec 18.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Knoxville on Sat, Dec 12, arriving in Denver International.Inbound indirect flight with Delta, departing from Denver International on Fri, Dec 18, arriving in Knoxville.Price includes taxes and charges.From $334, select.
Denver.$365 per passenger.Departing Sun, Jul 12, returning Thu, Nov 5.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Knoxville on Sun, Jul 12, arriving in Denver International.Inbound direct flight with Allegiant Air departing from Denver International on Thu, Nov 5, arriving in Knoxville.Price includes taxes and charges.From $365, select.
Denver.$382 per passenger.Departing Fri, Dec 11, returning Sat, Dec 19.Round-trip flight with United.Outbound direct flight with United departing from Knoxville on Fri, Dec 11, arriving in Denver International.Inbound direct flight with United departing from Denver International on Sat, Dec 19, arriving in Knoxville.Price includes taxes and charges.From $382, select.
Denver.$430 per passenger.Departing Thu, Dec 31, returning Thu, Jan 14.Round-trip flight with United.Outbound indirect flight with United, departing from Knoxville on Thu, Dec 31, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Thu, Jan 14, arriving in Knoxville.Price includes taxes and charges.From $430, select.
Denver.$983 per passenger.Departing Sun, Dec 27, returning Sat, Jan 2.Round-trip flight with United.Outbound direct flight with United departing from Knoxville on Sun, Dec 27, arriving in Denver International.Inbound direct flight with United departing from Denver International on Sat, Jan 2, arriving in Knoxville.Price includes taxes and charges.From $983, select.

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 September.
Jul
from $192
Aug
from $114
Sep
from $106
Oct
from $109
Nov
from $110
Dec
from $334
Jan
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Feb
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Mar
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Apr
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May
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Jun
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Direct flights from Knoxville to Denver International

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 $102
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Knoxville to Denver: Flight information

The things to know before you go.
Cheapest flight found$102
Cheapest month to flySeptember
Average flight time3 hrs, 21 mins
Most popular airlineSouthwest Airlines
Average flights per week22

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

The best price we found for a round-trip flight from Knoxville to Denver International is $102. 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 21 minutes is the average flight time from Knoxville to Denver International.
Southwest Airlines, United and Allegiant Air fly direct from Knoxville to Denver International.
There are 22 flights per week flying from Knoxville to Denver International, as of July 2026.
The cheapest month to fly from Knoxville to Denver International is usually September.
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 Sunday, September 27, 2026.
Yes – the average flight time is 3 hours and 21 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.

Traveling 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 traveling 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 travelers 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, $44 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 $102. Remember that fares can change due to demand when booking.

  • Book four months before traveling. 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 kilometers from central Knoxville. If you're driving, ride-sharing or catching a cab from the center, 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 (57ºF) and 32ºC (90ºF).

  • If you want to travel in cooler conditions, search for a cheap ticket from TYS to DEN in January. Temperatures average between -9ºC (16ºF) and 7ºC (45ºF) 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 kilometers 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 kilometers east of Denver, Aurora is another favorite stop in the United States. Get a taste of what this destination has to offer at Plains Conservation Center, 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.