Knoxville (TYS) to Denver (DEN): On-Time Performance
Data through May 2026
The calendar drives reliability on TYS–DEN. March 2025 flights landed on schedule 97% of the time, but June 2025 dropped to 56% — a gap of 41 points. Across the full period the route averages 85% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 64%), which matters most in the rough months.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 2.6
- last 12 months
- Duration
- 3h 29m
- scheduled
- Distance
- 1,162 mi
Best airline from TYS to DEN
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 93% | 6 min | 1.1% | 873 |
| United Airlines | 79% | 17 min | 0.7% | 585 |
| Allegiant Air | 79% | 12 min | 0.0% | 168 |
| Frontier Airlines | 70% | 23 min | 0.0% | 252 |
Monthly on-time trend
Best time to fly from TYS to DEN
Aim for departures around 9 a.m. (94% on-time); avoid 3 p.m. departures (40%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 11 min |
| Tuesday | 86% | 10 min |
| Wednesday | 86% | 13 min |
| Thursday | 82% | 13 min |
| Fridaybest | 87% | 11 min |
| Saturday | 87% | 12 min |
| Sunday | 84% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft21%
- Airline operations30%
- National airspace system43%
- Weather7%
Frequently asked questions
- How often are flights from TYS to DEN delayed?
- 15% of TYS–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from TYS to DEN?
- SkyWest Airlines has the best on-time record on this route at 93%, based on 873 flights. 4 airlines flew TYS–DEN frequently enough to compare in this period.
- What is the best time of day to fly from TYS to DEN?
- Departures around 9 a.m. have the best record (94% on-time), while departures around 3 p.m. have the worst (40%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from TYS to DEN?
- The scheduled TYS–DEN flight time averages 3h 29m over 1,162 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are TYS to DEN flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from TYS to DEN?
- June 2025 was the roughest month in this dataset, with only 56% of arrivals on time. The best was March 2025 at 97%. If your dates are flexible, that 41-point gap is worth planning around.
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Based on 1,894 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.