Knoxville (TYS) to Chicago (ORD): On-Time Performance
Data through July 2026
The calendar drives reliability on TYS–ORD. October 2024 flights landed on schedule 92% of the time, but December 2025 dropped to 45% — a gap of 47 points. Across the full period the route averages 74% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 59%), which matters most in the rough months.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 26 min
- completed flights
- Cancelled
- 2.7%
- Flights/day
- 6.0
- last 12 months
- Duration
- 2h 2m
- scheduled
- Distance
- 475 mi
Best airline from TYS to ORD
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 91% | 8 min | 1.7% | 604 |
| Republic Airways | 86% | 11 min | 0.7% | 442 |
| SkyWest Airlines | 73% | 29 min | 2.1% | 1,772 |
| Envoy Air | 72% | 17 min | 1.1% | 532 |
| PSA Airlines | 60% | 46 min | 6.3% | 912 |
Monthly on-time trend
Best time to fly from TYS to ORD
Aim for departures around 6 a.m. (90% on-time); avoid 6 p.m. departures (52%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 30 min |
| Tuesday | 74% | 24 min |
| Wednesday | 75% | 20 min |
| Thursday | 73% | 27 min |
| Friday | 72% | 30 min |
| Saturdaybest | 77% | 22 min |
| Sunday | 73% | 27 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft37%
- Airline operations33%
- National airspace system20%
- Weather11%
Frequently asked questions
- How often are flights from TYS to ORD delayed?
- 26% of TYS–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 26 minutes.
- Which airline is most reliable from TYS to ORD?
- United Airlines has the best on-time record on this route at 91%, based on 604 flights. 5 airlines flew TYS–ORD frequently enough to compare in this period.
- What is the best time of day to fly from TYS to ORD?
- Departures around 6 a.m. have the best record (90% on-time), while departures around 6 p.m. have the worst (52%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from TYS to ORD?
- The scheduled TYS–ORD flight time averages 2h 2m over 475 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are TYS to ORD flights cancelled?
- 2.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from TYS to ORD?
- December 2025 was the roughest month in this dataset, with only 45% of arrivals on time. The best was October 2024 at 92%. If your dates are flexible, that 47-point gap is worth planning around.
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Based on 4,262 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.