Your next trip, last seen at €65
Lowest observedAllegiant Air · Non-stop · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €65, departing 1 Nov 2026 (Last checked: 23 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 87Check live prices for this route
- Airlines seen
- Frontier Airlines, Allegiant Air, American Airlines, Delta Air Lines, JetBlue, Southwest Airlines, Sun Country Airlines, United Airlines (8)
- Reported fastest flight
- 2h 37m
- Non-stop
- Yes
About this route
Explore the fares we observed from Denver to Knoxville. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,892 km
- Reported fastest flight
- 2h 37m
- Alternative airports
- APA
Route-level information; individual journeys vary.
Published schedules report non-stop service with Frontier Airlines. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Allegiant Air | 8 / 90 | |
| United Airlines | 6 / 90 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Denver International Airport (DEN) → Denver, city gazetteer reference point (39.7392, -104.9847): ≈ 30 km.
- McGhee Tyson Airport (TYS) → Knoxville, city gazetteer reference point (35.9606, -83.9207): ≈ 18 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Denver to Knoxville: November 2026, from €65 (checked 23 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €122 | 3 |
| November 2026 | €65 | 30 |
| December 2026 | €98 | 31 |
| January 2027 | €100 | 23 |
Lowest fare by day of the week
Cheapest day of the week from Denver to Knoxville: Sunday, from €65 (checked 23 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €110 | 12 |
| Tuesday | €105 | 12 |
| Wednesday | €100 | 12 |
| Thursday | €104 | 13 |
| Friday | €111 | 13 |
| Saturday | €112 | 13 |
| Sunday | €65 | 12 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Denver to Knoxville by days until departure (0 to 7 days): €65 (checked 23 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €65 | 8 |
| 8 to 30 days | €89 | 23 |
| 31 to 60 days | €98 | 30 |
| 61 days or more | €100 | 26 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Denver to Knoxville: Allegiant Air, from €65 (checked 23 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Allegiant Air | €65Nov 1, 2026 | 11 |
| Frontier Airlines | €100Jan 20, 2027 | 70 |
| Southwest Airlines | €122Feb 25, 2027 | 3 |
| American Airlines | €125Jan 16, 2027 | 3 |
| United Airlines | €125Jan 16, 2027 | 8 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Denver to Knoxville?
The lowest fare Routavio has observed is €65, found on 23 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Denver to Knoxville?
Cheapest month from Denver to Knoxville: November 2026, from €65 (checked 23 Oct 2026).
Are there direct flights from Denver to Knoxville?
Yes. Published schedules report non-stop flights on this route with Frontier Airlines.
Which airlines fly from Denver to Knoxville?
Routavio has seen these carriers on the route: Frontier Airlines, Allegiant Air, American Airlines, Delta Air Lines, JetBlue, Southwest Airlines, Sun Country Airlines, United Airlines (8).
How long does the flight from Denver to Knoxville take?
Across the 92 fares Routavio observed, the average journey time is 23h 04m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Denver to Knoxville fares were non-stop?
13 of the 92 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Denver to Knoxville?
For Denver to Knoxville, examples of observed one-way non-stop offers checked within the last 14 days: Allegiant Air (8), United Airlines (6). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Denver to Knoxville?
Cheapest day of the week from Denver to Knoxville: Sunday, from €65 (checked 23 Oct 2026).
Which airline has the lowest fare from Denver to Knoxville?
Cheapest airline from Denver to Knoxville: Allegiant Air, from €65 (checked 23 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
Keep exploring
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Recently observed fares. Prices may change.
Last checked: 23 Oct 2026