Chicago (ORD) to Chattanooga (CHA): On-Time Performance
Data through July 2026
Delays are only half the story on ORD–CHA: 3.2% of its scheduled flights were outright cancelled, well above the US norm, so a backup plan matters more here than on most routes. When flights do go, 72% land on time, below the national average of 78%.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 3.2%
- Flights/day
- 2.6
- last 12 months
- Duration
- 1h 51m
- scheduled
- Distance
- 501 mi
Best airline from ORD to CHA
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 77% | 19 min | 3.4% | 206 |
| SkyWest Airlines | 71% | 22 min | 3.1% | 1,137 |
| Republic Airways | 71% | 22 min | 3.3% | 418 |
Monthly on-time trend
Best time to fly from ORD to CHA
Aim for departures around 8 a.m. (78% on-time); avoid 9 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 19 min |
| Tuesday | 75% | 24 min |
| Wednesday | 74% | 20 min |
| Thursday | 71% | 22 min |
| Friday | 72% | 24 min |
| Saturdaybest | 77% | 16 min |
| Sunday | 61% | 25 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations40%
- National airspace system18%
- Weather8%
Frequently asked questions
- How often are flights from ORD to CHA delayed?
- 28% of ORD–CHA 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 22 minutes.
- Which airline is most reliable from ORD to CHA?
- Envoy Air has the best on-time record on this route at 77%, based on 206 flights. 3 airlines flew ORD–CHA frequently enough to compare in this period.
- What is the best time of day to fly from ORD to CHA?
- Departures around 8 a.m. have the best record (78% on-time), while departures around 9 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to CHA?
- The scheduled ORD–CHA flight time averages 1h 51m over 501 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are ORD to CHA flights cancelled?
- 3.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from ORD to CHA?
- March 2025 was the roughest month in this dataset, with only 50% of arrivals on time. The best was October 2024 at 88%. If your dates are flexible, that 38-point gap is worth planning around.
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Based on 1,761 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.