Best Time to Fly CHA to ORD: On-Time Stats by Hour & Airline
Lovell Field → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.5% of Chattanooga (CHA) to Chicago (ORD) flights arrived on time (954 scheduled flights). That is 6.1 points below the national average of 77.6%.
Among 3 airlines, Envoy Air led with 75.0% on time and Republic Airways was last with 70.2%.
Over 24 months, Saturday was the most reliable day (79% on time) and March the worst month (61%).
The cancellation rate was 4.1% (US average 1.8%).
CHA to ORD on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Air | 75.0% | 57 min | 2.4% | 206 |
| SkyWest Airlines | 70.7% | 87 min | 5.4% | 481 |
| Republic Airways | 70.2% | 64 min | 3.0% | 267 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CHA to ORD
On-time arrival % by scheduled departure hour (local time), 1,668 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 12 | |
| 6am–7am | 82.7% | 2.4% | 254 |
| 7am–8am | 84.8% | 0.4% | 259 |
| 8am–9am | 77.9% | 4.6% | 130 |
| 10am–11am | 75.8% | 6.1% | 98 |
| 12pm–1pm | 80.4% | 0.5% | 210 |
| 1pm–2pm | 62.5% | 4.7% | 85 |
| 2pm–3pm | Limited data | 26 | |
| 4pm–5pm | Limited data | 25 | |
| 5pm–6pm | 54.7% | 2.8% | 425 |
| 6pm–7pm | 60.1% | 5.6% | 142 |
| 9pm–10pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CHA to ORD
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 63.4% | -8.1 pts | 12.8% | 47 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.1% | +0.6 pts | 0.0% | 68 |
| Summer peak (Jun 15 - Aug 15) | 73.2% | +1.7 pts | 0.8% | 127 |
| All other days | 71.5% | — | 2.8% | 1,426 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).