Chicago (ORD) to Knoxville (TYS): On-Time Performance
Data through July 2026
The calendar drives reliability on ORD–TYS. November 2024 flights landed on schedule 87% of the time, but January 2026 dropped to 51% — a gap of 36 points. Across the full period the route averages 71% on-time against a national 78%. Morning departures also hold up better than evening ones (78% vs 61%), which matters most in the rough months.
- On-time
- 71%
- arrived <15 min late
- Avg delay
- 27 min
- completed flights
- Cancelled
- 2.4%
- Flights/day
- 6.0
- last 12 months
- Duration
- 1h 47m
- scheduled
- Distance
- 475 mi
Best airline from ORD to TYS
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 86% | 10 min | 0.9% | 441 |
| SkyWest Airlines | 75% | 18 min | 1.5% | 1,772 |
| Envoy Air | 73% | 14 min | 1.1% | 531 |
| United Airlines | 63% | 30 min | 1.7% | 606 |
| PSA Airlines | 59% | 58 min | 6.4% | 912 |
Monthly on-time trend
Best time to fly from ORD to TYS
Aim for departures around 7 a.m. (82% on-time); avoid 6 p.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 27 min |
| Tuesdaybest | 74% | 26 min |
| Wednesday | 72% | 32 min |
| Thursday | 68% | 25 min |
| Friday | 69% | 24 min |
| Saturdaybest | 74% | 23 min |
| Sunday | 69% | 30 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft52%
- Airline operations26%
- National airspace system14%
- Weather8%
Frequently asked questions
- How often are flights from ORD to TYS delayed?
- 29% of ORD–TYS 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 27 minutes.
- Which airline is most reliable from ORD to TYS?
- Republic Airways has the best on-time record on this route at 86%, based on 441 flights. 5 airlines flew ORD–TYS frequently enough to compare in this period.
- What is the best time of day to fly from ORD to TYS?
- Departures around 7 a.m. have the best record (82% on-time), while departures around 6 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to TYS?
- The scheduled ORD–TYS flight time averages 1h 47m over 475 miles. Actual arrival times vary — flights on this route land 15+ minutes late 29% of the time.
- How often are ORD to TYS flights cancelled?
- 2.4% 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 ORD to TYS?
- January 2026 was the roughest month in this dataset, with only 51% of arrivals on time. The best was November 2024 at 87%. If your dates are flexible, that 36-point gap is worth planning around.
Explore related pages
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Related guides
Based on 4,262 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.