Best Time to Fly ORD to GSP: On-Time Stats by Hour & Airline
Chicago O'Hare International → Greenville-Spartanburg International
Data through July 2026 · Last updated October 18, 2026
1,815 flights were scheduled from Chicago (ORD) to Greer (GSP) in the last 12 months, and 74.1% of those that flew arrived on time, 3.5 points below the US average of 77.6%.
Republic Airways was the most punctual of the 5 airlines on the route at 82.2%, while PSA Airlines trailed at 52.8%.
April has been the best month (83% on time) and Sunday the weakest day of the week (73%).
4.0% of flights were cancelled, versus 1.8% nationally.
ORD to GSP 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 |
|---|---|---|---|---|
| Republic Airways | 82.2% | 70 min | 5.1% | 255 |
| Envoy Air | 77.9% | 68 min | 3.5% | 816 |
| SkyWest Airlines | 70.0% | 69 min | 3.4% | 594 |
| American Airlines | 59.2% | 53 min | 9.3% | 54 |
| PSA Airlines | 52.8% | 110 min | 5.3% | 95 |
| United Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to GSP
On-time arrival % by scheduled departure hour (local time), 3,226 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 4 | |
| 6am–7am | 76.2% | 0.0% | 42 |
| 7am–8am | 83.0% | 1.0% | 101 |
| 8am–9am | 87.1% | 2.0% | 500 |
| 9am–10am | 88.7% | 2.7% | 73 |
| 10am–11am | 70.5% | 0.0% | 44 |
| 11am–12pm | 87.5% | 1.4% | 73 |
| 1pm–2pm | 73.6% | 2.3% | 431 |
| 2pm–3pm | 84.2% | 0.5% | 184 |
| 3pm–4pm | 67.6% | 0.0% | 146 |
| 4pm–5pm | 72.3% | 3.7% | 191 |
| 5pm–6pm | 74.1% | 4.5% | 332 |
| 6pm–7pm | 70.6% | 2.2% | 534 |
| 7pm–8pm | 66.5% | 3.5% | 343 |
| 8pm–9pm | 69.5% | 6.2% | 178 |
| 9pm–10pm | 59.5% | 10.6% | 47 |
| 11pm–12am | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to GSP
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) | 71.7% | -5.4 pts | 19.4% | 67 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.2% | -1.9 pts | 0.8% | 118 |
| Summer peak (Jun 15 - Aug 15) | 69.2% | -7.8 pts | 2.4% | 661 |
| All other days | 77.1% | — | 2.5% | 2,380 |
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).