BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ORD→GSP

Chicago, IL (ORD) to Greer, SC (GSP) flight delay odds

69.8% of 1,799 official scheduled ORD-to-GSP flights arrived on time; 18.1% arrived at least 30 minutes late and 4.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALHigher disruption
69.8%arrived on time
18.1%30+ min late
4.0%cancelled
1,799scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.8%all scheduled flights
120+ minutes late3.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+12.7 mincompleted flights

Which departure time was most reliable for ORD to GSP?

Among qualifying ORD-to-GSP departure window results, Early morning had the highest on-time rate: 83.1% of 431 flights. Night was lowest at 44.4% across 45 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning43183.1%8.1%2.6%
Afternoon61970.0%17.8%2.6%
Evening67763.1%24.1%5.8%
Night4544.4%31.1%13.3%

Which weekday was most reliable for ORD to GSP?

Among qualifying ORD-to-GSP weekday results, Tuesday had the highest on-time rate: 75.1% of 249 flights. Sunday was lowest at 63.6% across 269 flights.

DayFlightsOn time30+ minCancelled
Monday28065.7%19.6%7.1%
Tuesday24975.1%13.7%3.2%
Wednesday25068.4%22.4%1.2%
Thursday26773.0%16.1%1.9%
Friday26674.4%15.8%2.6%
Saturday21868.8%17.0%6.0%
Sunday26963.6%21.9%5.9%

Which airline was most reliable for ORD to GSP?

Among qualifying ORD-to-GSP airline results, Republic Airways had the highest on-time rate: 76.6% of 312 flights. PSA Airlines was lowest at 45.2% across 126 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air77874.0%15.2%3.3%
SkyWest Airlines52867.0%19.1%3.6%
Republic Airways31276.6%13.5%4.5%
PSA Airlines12645.2%38.9%6.3%
American Airlines5453.7%29.6%9.3%
United Airlines1100.0%0.0%0.0%

Which month was most reliable for ORD to GSP?

Among qualifying ORD-to-GSP month results, April 2026 had the highest on-time rate: 82.5% of 143 flights. January 2026 was lowest at 58.3% across 120 flights.

MonthFlightsOn time30+ minCancelled
July 202517060.6%27.6%2.9%
August 202514770.7%15.0%5.4%
September 202512879.7%14.1%0.8%
October 202517369.4%17.9%0.0%
November 202516564.2%14.5%10.9%
December 202514062.9%25.7%4.3%
January 202612058.3%25.0%8.3%
February 202612272.1%18.9%0.0%
March 202615062.7%22.0%9.3%
April 202614382.5%10.5%2.1%
May 202618578.4%10.3%2.2%
June 202615675.6%17.9%1.9%

What drove ORD to GSP delay minutes?

Late aircraft was the largest recorded ORD-to-GSP delay category, accounting for 43.5% of 34,721 BTS-attributed delay minutes during July 2025–June 2026.

Airline29.5%
Late aircraft43.5%
National airspace18.0%
Weather8.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.