Airports › Knoxville (TYS) › September 2025
Airport month · September 2025
McGhee Tyson in September 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In September 2025, reporting carriers scheduled 1,097 domestic departures from McGhee Tyson (TYS). 81.6% left less than 15 minutes late and 81.3% reached their destination on time; 0.5% were cancelled.
Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so TYS departures were 1.5 points below the national departure figure.
A year earlier, in September 2024, the airport had 1,406 departures with 84.6% leaving on time: a change of −3.0 points, with flights down 22%.
Flights arriving at TYS that month were on time 80.5% of the time (1,097 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 33% and national aviation system 13%.
- On time 81.3%
- Arrived 15+ minutes late 17.7%
- Cancelled 0.5%
- Diverted 0.5%
September 2025 against a year earlier, the airport's year and the nation
| Measure | Sep 2025 | Sep 2024 | TYS, 12 months to Jul 2026 | All reported flights, Sep 2025 |
|---|---|---|---|---|
| Departed on time | 81.6% | 84.6% | 76.3% | 83.1% |
| Arrived on time | 81.3% | 84.5% | 75.1% | 82.8% |
| Cancelled | 0.5% | 0.8% | 2.1% | 0.5% |
| Average departure delay (late minutes only) | 16.4 min | 12.2 min | 22.0 min | 12.2 min |
| Scheduled departures a day | 37 | 47 | 37 | 18,748 |
| Scheduled departures | 1,097 | 1,406 | 13,561 | 562,439 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OH PSA Airlines | 274 | 25% | 77.4% | 6.9 min | 0.7% |
| G4 Allegiant Air | 246 | 22% | 81.7% | 1.1 min | 0.0% |
| DL Delta Air Lines | 154 | 14% | 90.9% | -8.4 min | 0.0% |
| AA American Airlines | 150 | 14% | 76.0% | 35.5 min | 2.0% |
| OO SkyWest Airlines | 80 | 7% | 77.5% | 0.3 min | 1.3% |
| UA United Airlines | 63 | 6% | 85.7% | 2.8 min | 0.0% |
| MQ Envoy Air | 59 | 5% | 81.4% | 10.3 min | 0.0% |
| YX Republic Airline | 58 | 5% | 87.9% | -3.9 min | 0.0% |
| F9 Frontier Airlines | 13 | 1% | 76.9% | 8.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| TYS–ORD | Knoxville to Chicago | 192 | 73.4% | 10.7 min | 1.0% |
| TYS–ATL | Knoxville to Atlanta | 154 | 90.9% | -8.4 min | 0.0% |
| TYS–DFW | Knoxville to Dallas/Fort Worth | 150 | 75.3% | 16.8 min | 2.7% |
| TYS–CLT | Knoxville to Charlotte | 102 | 79.4% | 31.3 min | 0.0% |
| TYS–DCA | Knoxville to Washington | 86 | 79.1% | 4.8 min | 0.0% |
| TYS–DEN | Knoxville to Denver | 81 | 88.9% | -1.9 min | 0.0% |
| TYS–SFB | Knoxville to Sanford | 47 | 89.4% | -3.3 min | 0.0% |
| TYS–PIE | Knoxville to St. Petersburg | 39 | 71.8% | 9.2 min | 0.0% |
| TYS–LGA | Knoxville to New York | 34 | 85.3% | -4.7 min | 0.0% |
| TYS–MIA | Knoxville to Miami | 30 | 86.7% | 14.1 min | 0.0% |
| TYS–PHL | Knoxville to Philadelphia | 30 | 96.7% | -17.8 min | 0.0% |
| TYS–FLL | Knoxville to Fort Lauderdale | 28 | 71.4% | 10.5 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left TYS on time in September 2025?
81.6% of 1,097 scheduled domestic departures left less than 15 minutes late, and 81.3% reached their destination on time. The national figures that month were 83.1% and 82.8%.
How does that compare with a year earlier?
In September 2024, 84.6% of 1,406 departures left on time and 0.8% were cancelled, against 81.6% and 0.5% in September 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for TYS · methodology · corrections.