McGhee Tyson (TYS) Delays and On-Time Departures
Knoxville, TN · ranked 242nd of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
78.0% of the 13,561 flights scheduled to depart Knoxville (TYS) in the last 12 months left on time, 0.5 points above the US average of 77.4%.
That ranks 242nd of 333 US airports tracked on this site, with 2.1% of departures cancelled.
Among airlines at Knoxville (TYS), United Airlines left on time most often (86.9%).
Over 24 months, Tuesday was the most reliable day (83% on time) and July the worst month (72%).
Best time of day to fly out of Knoxville (TYS)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.2% | 2.1% | 1,604 |
| 6am–7am | 90.3% | 1.9% | 2,597 |
| 7am–8am | 88.1% | 2.0% | 3,189 |
| 8am–9am | 88.8% | 1.1% | 1,926 |
| 9am–10am | 90.7% | 0.8% | 941 |
| 10am–11am | 82.4% | 1.2% | 1,595 |
| 11am–12pm | 80.5% | 1.6% | 1,781 |
| 12pm–1pm | 81.3% | 1.7% | 2,162 |
| 1pm–2pm | 77.3% | 1.7% | 1,442 |
| 2pm–3pm | 78.2% | 1.2% | 1,653 |
| 3pm–4pm | 70.2% | 0.7% | 969 |
| 4pm–5pm | 76.1% | 1.7% | 2,505 |
| 5pm–6pm | 71.3% | 3.2% | 2,508 |
| 6pm–7pm | 63.6% | 3.1% | 1,783 |
| 7pm–8pm | 62.3% | 2.6% | 1,013 |
| 8pm–9pm | 67.3% | 2.9% | 520 |
| 9pm–10pm | 47.5% | 1.5% | 325 |
| 10pm–11pm | 50.5% | 3.5% | 113 |
| 11pm–12am | Limited data | 5 | |
Airlines at TYS ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| United Airlines | 86.9% | 84.6% | 0.9% | 677 |
| Delta Air Lines | 85.5% | 87.9% | 1.9% | 1,720 |
| Envoy Air | 82.3% | 81.8% | 1.1% | 726 |
| SkyWest Airlines | 78.2% | 75.5% | 2.9% | 1,307 |
| Southwest Airlines | 77.2% | 80.9% | 0.1% | 823 |
| Allegiant Air | 76.1% | 73.2% | 0.5% | 3,364 |
| Frontier Airlines | 75.6% | 74.1% | 0.0% | 135 |
| Republic Airways | 75.5% | 76.9% | 1.0% | 202 |
| American Airlines | 75.3% | 76.1% | 3.6% | 1,613 |
| PSA Airlines | 74.3% | 72.8% | 4.2% | 2,994 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of TYS
On-time departures by day, 24 months.
Best month to fly out of TYS
On-time departures by month, 24 months.
Holiday travel at Knoxville (TYS)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 81.3% | -0.2 pts | 1.7% | 583 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.9% | -9.6 pts | 0.4% | 1,075 |
| Summer peak (Jun 15 - Aug 15) | 73.4% | -8.1 pts | 2.7% | 5,314 |
| All other days | 81.5% | — | 1.8% | 21,659 |
Monthly on-time departure trend at TYS
On-time departure % each month, with the 12-month US average for reference.
Routes from Knoxville (TYS)
Every route from TYS with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| TYS → Chicago (ORD) | 69.7% | 4.1% | 2,188 |
| TYS → Dallas/Fort Worth (DFW) | 77.0% | 3.8% | 1,738 |
| TYS → Atlanta (ATL) | 87.8% | 1.9% | 1,719 |
| TYS → Washington (DCA) | 70.5% | 4.1% | 1,021 |
| TYS → Denver (DEN) | 84.7% | 0.5% | 1,001 |
| TYS → Charlotte (CLT) | 79.5% | 2.5% | 894 |
| TYS → Sanford (SFB) | 68.9% | 0.6% | 639 |
| TYS → St. Petersburg (PIE) | 73.9% | 0.6% | 522 |
| TYS → Miami (MIA) | 82.0% | 0.6% | 487 |
| TYS → Fort Lauderdale (FLL) | 53.7% | 0.8% | 481 |
| TYS → Philadelphia (PHL) | 82.6% | 2.6% | 342 |
| TYS → Nashville (BNA) | 81.1% | 0.0% | 297 |
| TYS → Orlando (MCO) | 76.4% | 0.8% | 264 |
| TYS → Punta Gorda (PGD) | 69.9% | 0.0% | 217 |