Cheap Flights from Denver, CO to Knoxville, TN from $158

Return flight: Knoxville – Denver

On Cheapflightsplus.com you will find 36 connecting flights from Denver to Knoxville. You can compare airfare deals from 3 airlines and multiple travel sites from $158, book and save on cheap plane tickets and last minute offers. Also check out DEN-TYS flight schedule to find best flight time, convenient departure and arrival airports.

Flight Information

Below we will explain in detail what the flights cost on the destination from Denver to Knoxville depends on and how to choose the most interesting flight option for you.

Distance between Denver and Knoxville is 1866 miles. Time difference between the cities is 2h. Airplanes depart 06:01 to 23:59 from 2 Denver airports and arrive 06:01 to 23:59 to 1 Knoxville airport. Average flight time is 16h 43m.

  • The fastest flight 5h 47m
  • Average flight time 16h 43m
  • The earliest flight 06:01
  • The latest flight 23:59
  • Distance 1160 ml

The cheapest months to travel to Knoxville are july (from 158 $), august (from 218 $), june (from 306 $).

The most expensive months are may (from 336 $), june (from 306 $), august (from 218 $).

What is the lowest airfare Denver to Knoxville?

The cheapest plane ticket found by our users is $158. This airfare is for economy class on one-way G4226 flight by Allegiant Air for August 1, 2025 which leaves Denver International in Denver at 18:44 am and arrives at Knoxville Mc Ghee Tyson at 21:42.

Economy class
$158
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Business class
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First class
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Flight Schedule Denver (Colorado) to Knoxville (Tennessee)

08:00 — 21:40+1day
35h 40m flight time
Find flight
from$188
08:00 — 12:42 Denver — Covington
G4411 Allegiant Air
22h 46m stop
11:28 — 13:38 Covington — Clearwater
G42042 Allegiant Air
6h 22m stop
20:00 — 21:40 Clearwater — Knoxville
G43048 Allegiant Air
08:00 — 21:42+1day
35h 42m flight time
Find flight
from$218
08:00 — 12:42 Denver — Covington
G4411 Allegiant Air
19h 48m stop
08:30 — 09:20 Covington — Fort Walton Beach
G4363 Allegiant Air
10h 1m stop
19:21 — 21:42 Fort Walton Beach — Knoxville
G41396 Allegiant Air
08:00 — 16:39+1day
30h 39m flight time
Find flight
from$303
08:00 — 12:42 Denver — Covington
G4411 Allegiant Air
19h 48m stop
08:30 — 09:20 Covington — Fort Walton Beach
G4363 Allegiant Air
4h 58m stop
14:18 — 16:39 Fort Walton Beach — Knoxville
G43043 Allegiant Air
10:07 — 23:27
11h 20m flight time
Find flight
from$482
10:07 — 13:38 Denver — Houston
UA2676 United Airlines
6h 22m stop
20:12 — 23:39 Houston — Knoxville
UA4810 United Airlines
14:44 — 10:17+1day
17h 33m flight time
Find flight
from$374
14:44 — 18:24 Denver — Chicago
UA1023 United Airlines
13h 1m stop
07:25 — 10:17 Chicago — Knoxville
UA5726 United Airlines
18:13 — 22:47+1day
26h 34m flight time
Find flight
from$462
18:13 — 21:14 Denver — Minneapolis
SY658 Sun Country Airlines
10h 22m stop
07:36 — 11:49 Minneapolis — Sanford
SY341 Sun Country Airlines
9h 23m stop
21:12 — 22:47 Sanford — Knoxville
G43054 Allegiant Air
18:44 — 21:42+1day
24h 58m flight time
Find flight
from$158
16:05 — 21:00 Denver — Fletcher
G4226 Allegiant Air
14h 31m stop
14:10 — 14:39 Fletcher — Fort Walton Beach
G4263 Allegiant Air
4h 42m stop
19:21 — 21:42 Fort Walton Beach — Knoxville
G41396 Allegiant Air
18:44 — 22:47+1day
26h 3m flight time
Find flight
from$164
16:05 — 21:00 Denver — Fletcher
G4226 Allegiant Air
18h 10m stop
17:49 — 19:18 Fletcher — Sanford
G4231 Allegiant Air
1h 54m stop
21:12 — 22:47 Sanford — Knoxville
G43054 Allegiant Air
18:44 — 22:47+1day
26h 3m flight time
Find flight
from$170
16:05 — 21:00 Denver — Fletcher
G4226 Allegiant Air
13h 57m stop
13:36 — 15:05 Fletcher — Sanford
G41891 Allegiant Air
6h 7m stop
21:12 — 22:47 Sanford — Knoxville
G43054 Allegiant Air
18:44 — 21:40+1day
24h 56m flight time
Find flight
from$198
16:05 — 21:00 Denver — Fletcher
G4226 Allegiant Air
12h 6m stop
11:45 — 13:23 Fletcher — Clearwater
G41879 Allegiant Air
6h 37m stop
20:00 — 21:40 Clearwater — Knoxville
G43048 Allegiant Air
18:44 — 17:59+1day
21h 15m flight time
Find flight
from$209
16:05 — 21:00 Denver — Fletcher
G4226 Allegiant Air
13h 57m stop
13:36 — 15:05 Fletcher — Sanford
G41891 Allegiant Air
1h 19m stop
16:24 — 17:59 Sanford — Knoxville
G43059 Allegiant Air
20:55 — 13:21+1day
14h 26m flight time
Find flight
from$369
20:50 — 00:25 Denver — Chicago
UA377 United Airlines
10h 5m stop
10:35 — 13:21 Chicago — Knoxville
UA5836 United Airlines
20:55 — 17:05+1day
18h 10m flight time
Find flight
from$390
20:55 — 00:30 Denver — Chicago
UA377 United Airlines
13h 38m stop
14:08 — 17:05 Chicago — Knoxville
UA5429 United Airlines
20:55 — 22:35+1day
23h 40m flight time
Find flight
from$390
20:50 — 00:25 Denver — Chicago
UA377 United Airlines
19h 20m stop
19:55 — 22:40 Chicago — Knoxville
UA2005 United Airlines
23:59 — 10:27+1day
8h 28m flight time
Find flight
from$306
23:50 — 05:15 Denver — Washington D.C.
UA1924 United Airlines
3h 21m stop
08:45 — 10:27 Washington D.C. — Knoxville
UA4257 United Airlines
Full flight schedule will help you in detecting at what time planes fly from Denver to Knoxville. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
*Departure and arrival times - local. Updated on October 16, 2025.

Popular Airlines on the Route

The flight Denver — Knoxville is served by 3 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Sun Country Airlines - 3 departures per week at the price of from $ 462 . And the most expensive tickets are offered by United Airlines airline - from $ 1594.

Direct flights

There’re no direct flights on this route. Try flights with stops.

Connecting Flights

There are 36 flights with layovers on the route. The fastest connecting flight is UA489 by United Airlines takes 5h 47m and the cheapest is G4226 by Allegiant Air for $158.

  • SY - Sun Country Airlines
    from $462
    Find
  • UA - United Airlines
    from $306
    Find
  • G4 - Allegiant Air
    from $158
    Find
See more connecting flights

Airports

You can fly from Denver to Knoxville from 2 airports (Denver International, Arapahoe Co).

Denver airports

  • Denver International-DEN
    from $158
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  • Arapahoe Co-APA
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Knoxville airports

  • Mc Ghee Tyson-TYS
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How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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