Carrier route record
YXGSP→ORD
Republic Airways · Greer to Chicago
- 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 GSP to ORD earns a B−. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 255 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 862 at 75.4% on time.
Set against the rest of the country, Republic's GSP to ORD record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 244 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
3.53%
National rate is 1.89%
Whole route
75.9%
Every carrier on GSP to ORD, 1,870 flights
These figures cover 255 flights between September 2025 and August 2026. The median arrival is 12 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Republic against every carrier on GSP to ORD
Republic flew 255 of the 1,870 flights on GSP to ORD, about 14% of it. Its 84.4% on time is 9 points better than the route as a whole, which runs 75.9%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from United at 100.0% to SkyWest at 71.4%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlinesthin sample | 4 | 100.0% | — | 0.00% | A+ |
| PSA Airlinesthin sample | 65 | 88.9% | 69 min | 1.54% | A |
| Republic Airways (this page)thin sample | 255 | 84.4% | 70 min | 3.53% | B− |
| American Airlinesthin sample | 54 | 77.6% | 56 min | 9.26% | B− |
| Envoy Air | 862 | 75.4% | 68 min | 3.60% | B− |
| SkyWest Airlines | 630 | 71.4% | 79 min | 3.97% | C− |
SkyWest Airlines cancels 4.0% 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.
- 5am–8am61 flights91.8%
- 8am–11am144 flights89.3%
- 11am–2pm4 flights—
- 2pm–5pm13 flights—
- 5pm–8pm30 flights—
- 8pm–5am3 flights—
Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.
The 5am–8am window is the strongest at 91.8% on time. The full set of windows spans 3 points.
Across the year
Republic on GSP to ORD through the year
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202597 flights85.7%
- Jan–Mar 202639 flights58.3%
- Apr–Jun 202644 flights88.6%
- Jul–Sep 202645 flights90.7%
Scale runs 50% to 100%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 84.4% on time across 255 flights.
Republic on GSP to ORD did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 58.3%, a swing of 38 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, Thursday is the strongest day at 90.0% on time and Friday the weakest at 81.1%, a spread of 9 points.
Arrival by arrival
How late Republic on GSP to ORD runs when it is late
Republic on GSP to ORD often beats the schedule: 113 of 244 completed flights, 46%, arrived 15 minutes or more early. The 38 late arrivals split 15 under half an hour, 9 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early113 flights46.3%
- Within 15 min93 flights38.1%
- 15–29 min late15 flights6.1%
- 30–59 min late9 flights3.7%
- 1–2 hours late5 flights2.0%
- 2+ hours late9 flights3.7%
Scale runs 0% to 100%.
Share of 244 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 23 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 17 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 ORD.
The worst days
Worst days for Republic on GSP to ORD
The latest arrival of the period was on 10 November 2025, 4 hours 17 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 November 2025 | 4 hours 17 minutes | National Airspace System |
| 11 August 2026 | 3 hours 26 minutes | National Airspace System |
| 22 December 2025 | 3 hours 13 minutes | Late-arriving aircraft |
| 13 September 2025 | 2 hours 52 minutes | Extreme weather |
| 7 December 2025 | 2 hours 32 minutes | National Airspace System |
Delay causes
Why Republic runs late on this route
National Airspace System accounts for 61% of the 2,651 delay minutes carriers reported here, and the remaining four split what is left.
- 61%National Airspace System
- 20%Late-arriving aircraft
- 13%Carrier
- 6%Extreme weather
61% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,619 minutes out of 2,651, against a national NAS share of 21%. The split is drawn from 2,651 reported delay minutes.
Cancellations run at 3.53%, against 1.89% nationally. That is about one flight in 30 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
5.7% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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 81.1% on time across 255 flights, 3 points below 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 GSP to ORD
Put together: the delay figures matter less here than the 3.53% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 244 completed flights over 12 months sit behind that.
Related
Where to go next
- GSP to ORD, every carrier
- Republic on ORD to GSP, the return leg
- Envoy Air on GSP to ORD75.4%
- SkyWest Airlines on GSP to ORD71.4%
- Republic Airways network-wide record
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- What a cancellation rate actually tells you (and what it hides)
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.