Greer (GSP) to Chicago (ORD): On-Time Performance
Data through July 2026
The calendar drives reliability on GSP–ORD. February 2025 flights landed on schedule 91% of the time, but December 2025 dropped to 60% — a gap of 30 points. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 58%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 2.6%
- Flights/day
- 5.0
- last 12 months
- Duration
- 2h 15m
- scheduled
- Distance
- 577 mi
Best airline from GSP to ORD
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 89% | 19 min | 0.9% | 110 |
| Republic Airways | 83% | 10 min | 2.0% | 706 |
| PSA Airlines | 81% | 15 min | 3.3% | 152 |
| Envoy Air | 74% | 18 min | 2.4% | 1,487 |
| SkyWest Airlines | 73% | 23 min | 3.2% | 855 |
Monthly on-time trend
Best time to fly from GSP to ORD
Aim for departures around 9 a.m. (90% on-time); avoid 6 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 15 min |
| Tuesdaybest | 80% | 13 min |
| Wednesday | 79% | 19 min |
| Thursday | 76% | 19 min |
| Friday | 71% | 17 min |
| Saturday | 75% | 18 min |
| Sunday | 74% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations32%
- National airspace system29%
- Weather7%
Frequently asked questions
- How often are flights from GSP to ORD delayed?
- 24% of GSP–ORD 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 17 minutes.
- Which airline is most reliable from GSP to ORD?
- United Airlines has the best on-time record on this route at 89%, based on 110 flights. 5 airlines flew GSP–ORD frequently enough to compare in this period.
- What is the best time of day to fly from GSP to ORD?
- Departures around 9 a.m. have the best record (90% on-time), while departures around 6 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GSP to ORD?
- The scheduled GSP–ORD flight time averages 2h 15m over 577 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are GSP to ORD flights cancelled?
- 2.6% 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 GSP to ORD?
- December 2025 was the roughest month in this dataset, with only 60% of arrivals on time. The best was February 2025 at 91%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 3,364 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.