Chicago (ORD) to Greer (GSP): On-Time Performance
Data through May 2026
The calendar drives reliability on ORD–GSP. February 2025 flights landed on schedule 87% of the time, but June 2025 dropped to 58% — a gap of 29 points. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 69%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 2.8%
- Flights/day
- 4.8
- last 12 months
- Duration
- 1h 58m
- scheduled
- Distance
- 577 mi
Best airline from ORD to GSP
5 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 85% | 12 min | 2.6% | 739 |
| Envoy Air | 77% | 14 min | 2.3% | 1,363 |
| SkyWest Airlines | 72% | 18 min | 3.2% | 723 |
| United Airlines | 65% | 30 min | 0.9% | 108 |
| PSA Airlines | 42% | 68 min | 6.6% | 152 |
Monthly on-time trend
Best time to fly from ORD to GSP
Aim for departures around 9 a.m. (89% on-time); avoid 9 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 15 min |
| Tuesdaybest | 78% | 15 min |
| Wednesday | 73% | 18 min |
| Thursday | 76% | 20 min |
| Friday | 77% | 17 min |
| Saturday | 77% | 17 min |
| Sunday | 71% | 22 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft44%
- Airline operations27%
- National airspace system23%
- Weather7%
Frequently asked questions
- How often are flights from ORD to GSP delayed?
- 25% of ORD–GSP flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from ORD to GSP?
- Republic Airways has the best on-time record on this route at 85%, based on 739 flights. 5 airlines flew ORD–GSP frequently enough to compare in this period.
- What is the best time of day to fly from ORD to GSP?
- Departures around 9 a.m. have the best record (89% on-time), while departures around 9 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to GSP?
- The scheduled ORD–GSP flight time averages 1h 58m over 577 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are ORD to GSP flights cancelled?
- 2.8% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from ORD to GSP?
- June 2025 was the roughest month in this dataset, with only 58% of arrivals on time. The best was February 2025 at 87%. If your dates are flexible, that 29-point gap is worth planning around.
Explore related pages
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Based on 3,139 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.