Carrier route record
YXORD→GSP
Republic Airways · Chicago to Greer
- Flights
- 255
- Period
- September 2025 to August 2026
- Share of route
- 14%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on ORD to GSP lands a B−, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 255 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 865 at 78.3% on time.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on ORD to GSP from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 243 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
4.31%
National rate is 1.89%
Whole route
74.2%
Every carrier on ORD to GSP, 1,872 flights
These figures cover 255 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Republic against every carrier on ORD to GSP
Republic flew 255 of the 1,872 flights on ORD to GSP, about 14% of it. Its 81.1% on time is 7 points better than the route as a whole, which runs 74.2%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from United at 100.0% to PSA at 54.0%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Envoy Air arrives on time 78.3% of the time; SkyWest Airlines manages 69.0%. Sample sizes sit next to every figure, because a two-point gap across 630 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlinesthin sample | 4 | 100.0% | — | 0.00% | A+ |
| Republic Airways (this page)thin sample | 255 | 81.1% | 75 min | 4.31% | B− |
| Envoy Air | 865 | 78.3% | 72 min | 3.58% | B− |
| SkyWest Airlines | 630 | 69.0% | 66 min | 3.33% | C− |
| American Airlinesthin sample | 54 | 59.2% | 53 min | 9.26% | D− |
| PSA Airlinesthin sample | 64 | 54.0% | 123 min | 0.00% | F+ |
Envoy Air cancels 3.6% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
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Departure window
When Republic runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 255 flights.
There are not enough flights in each departure window to split Republic's ORD to GSP record by time of day without the percentages moving on noise. The headline rate of 81.1% is the reliable figure here.
Across the year
Republic on ORD to GSP through the year
- Jul–Sep 202530 flights76.7%
- Oct–Dec 202596 flights77.5%
- Jan–Mar 202639 flights80.0%
- Apr–Jun 202644 flights90.9%
- Jul–Sep 202646 flights82.2%
Scale runs 70% to 95%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 81.1% on time across 255 flights.
Republic on ORD to GSP did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.9% on time and its weakest Jul–Sep 2025 at 76.7%, a swing of 14 points on roughly 51 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Tuesday is the strongest day at 86.8% on time and Sunday the weakest at 74.2%, a spread of 13 points.
Arrival by arrival
How late Republic on ORD to GSP runs when it is late
Republic on ORD to GSP often beats the schedule: 97 of 243 completed flights, 40%, arrived 15 minutes or more early. The 46 late arrivals split 14 under half an hour, 9 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early97 flights39.9%
- Within 15 min100 flights41.2%
- 15–29 min late14 flights5.8%
- 30–59 min late9 flights3.7%
- 1–2 hours late20 flights8.2%
- 2+ hours late3 flights1.2%
Scale runs 0% to 100%.
Share of 243 completed flights by arrival against schedule.
8 of 40 late departures made up the time and arrived on time, 20% of them. In the other direction, 14 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at GSP.
The worst days
Worst days for Republic on ORD to GSP
The latest arrival of the period was on 31 August 2026, 11 hours 20 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 31 August 2026 | 11 hours 20 minutes | Extreme weather |
| 21 April 2026 | 2 hours 46 minutes | Late-arriving aircraft |
| 11 August 2026 | 2 hours 37 minutes | Late-arriving aircraft |
| 28 December 2025 | 1 hour 58 minutes | Carrier |
| 1 December 2025 | 1 hour 56 minutes | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 51% of the 3,454 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 18%National Airspace System
- 17%Extreme weather
- 15%Carrier
Extreme weather accounts for 17% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.8 times the usual weather exposure. The split is drawn from 3,454 reported delay minutes.
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,454 reported delay minutes here, that single category outweighs weather by 3 to one.
Cancellations run at 4.31%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 577 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 84.4% on time across 255 flights, 3 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
One caution: this is a thin sample. 255 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Republic on ORD to GSP
Put together: the delay figures matter less here than the 4.31% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5pm–8pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 243 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to GSP, every carrier
- Republic on GSP to ORD, the return leg
- Envoy Air on ORD to GSP78.3%
- SkyWest Airlines on ORD to GSP69.0%
- Republic Airways network-wide record
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.