Cheap flights from Knoxville, TN to Denver, CO
Flights starting at $65. Choose between Delta Air Lines, United Airlines, or Allegiant Air to find the best price.
100+ million searches a day to find you the best available price.
Explore unique options you won’t find anywhere else.
Discover flight options and prices the airlines don’t want you to see.
Tips to know when travelling to Denver
Search by stops
Search by carrier
Search by price
Search by departure date
One-way trips
Updated:
Return trips
Updated:

By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.
Weekly direct flights
Mondays | Tuesdays | Wednesdays | Thursdays | Fridays | Saturdays | Sundays | |
---|---|---|---|---|---|---|---|
Direct flights | 3 | 2 | 2 | 3 | 3 | 2 | 3 |
Frontier Airlines on Mondays, Wednesdays, Fridays, Saturdays, and Sundays.
Allegiant Air on Thursdays, and Sundays.
United Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.
Check-in for a flight from Knoxville to Denver
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Delta Air Lines | DAL | DL | Yes | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
JetBlue Airways | JBU | B6 | Yes | Opens 24 days before flight Closes 2 hours before flight |
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from Knoxville
- Flights from Knoxville to Las Vegas
- Flights from Knoxville to New York
- Flights from Knoxville to Orlando
- Flights from Knoxville to Los Angeles
- Flights from Knoxville to Fort Lauderdale
- Flights from Knoxville to Salt Lake City
- Flights from Knoxville to Chicago
- Flights from Knoxville to San Francisco
- Flights from Knoxville to Houston
- Flights from Knoxville to Sacramento
- Flights from Knoxville to Boston
- Flights from Knoxville to Minneapolis
- Flights from Knoxville to Tampa
- Flights from Knoxville to London
- Flights from Knoxville to San Juan
- Flights from Knoxville to Phoenix
- Flights from Knoxville to Dallas
- Flights from Knoxville to San Diego
- Flights from Knoxville to Destin
- Flights from Knoxville to Paris
Flights to Denver
- Flights from Chicago to Denver
- Flights from Dallas to Denver
- Flights from Minneapolis to Denver
- Flights from Los Angeles to Denver
- Flights from Washington, D.C. to Denver
- Flights from Houston to Denver
- Flights from Orlando to Denver
- Flights from San Francisco to Denver
- Flights from Atlanta to Denver
- Flights from Las Vegas to Denver
- Flights from Austin to Denver
- Flights from Phoenix to Denver
- Flights from Philadelphia to Denver
- Flights from San Diego to Denver
- Flights from Miami to Denver
- Flights from New York to Denver
- Flights from Tampa to Denver
- Flights from Detroit to Denver
- Flights from Seattle to Denver
- Flights from Salt Lake City to Denver
Airports near Knoxville
- Nashville International
- McGhee Tyson
- Asheville Regional
- Greenville–Spartanburg International
- Blue Grass
- Chattanooga Metropolitan
- Tri-Cities Regional