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

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

71.6% of 1,797 official scheduled GSP-to-ORD flights arrived on time; 15.7% arrived at least 30 minutes late and 3.8% 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 SIGNALVariable
71.6%arrived on time
15.7%30+ min late
3.8%cancelled
1,797scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.5%all scheduled flights
120+ minutes late3.9%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+9.6 mincompleted flights

Which departure time was most reliable for GSP to ORD?

Among qualifying GSP-to-ORD departure window results, Late morning had the highest on-time rate: 83.5% of 532 flights. Evening was lowest at 53.8% across 612 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning55279.3%10.3%3.8%
Late morning53283.5%9.4%1.1%
Afternoon9677.1%14.6%6.2%
Evening61253.8%26.3%5.6%

Which weekday was most reliable for GSP to ORD?

Among qualifying GSP-to-ORD weekday results, Wednesday had the highest on-time rate: 77.4% of 252 flights. Sunday was lowest at 65.2% across 267 flights.

DayFlightsOn time30+ minCancelled
Monday27973.5%14.0%6.5%
Tuesday24973.9%14.1%2.0%
Wednesday25277.4%14.7%2.4%
Thursday26271.0%17.6%1.5%
Friday26669.9%15.8%1.9%
Saturday22270.7%15.3%6.3%
Sunday26765.2%18.7%6.4%

Which airline was most reliable for GSP to ORD?

Among qualifying GSP-to-ORD airline results, Republic Airways had the highest on-time rate: 81.8% of 313 flights. SkyWest Airlines was lowest at 66.8% across 527 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air77569.4%16.8%3.5%
SkyWest Airlines52766.8%19.9%4.7%
Republic Airways31381.8%9.3%2.9%
PSA Airlines12780.3%7.9%2.4%
American Airlines5470.4%16.7%9.3%
United Airlines1100.0%0.0%0.0%

Which month was most reliable for GSP to ORD?

Among qualifying GSP-to-ORD month results, September 2025 had the highest on-time rate: 86.7% of 128 flights. December 2025 was lowest at 57.9% across 140 flights.

MonthFlightsOn time30+ minCancelled
July 202517061.2%25.3%1.2%
August 202514778.9%8.2%4.1%
September 202512886.7%7.0%1.6%
October 202517380.3%12.7%0.0%
November 202516665.1%21.7%9.6%
December 202514057.9%26.4%4.3%
January 202611958.0%17.6%6.7%
February 202612173.6%11.6%1.7%
March 202615167.5%17.9%8.6%
April 202614277.5%12.7%3.5%
May 202618480.4%10.9%2.2%
June 202615670.5%15.4%3.2%

What drove GSP to ORD delay minutes?

Late aircraft was the largest recorded GSP-to-ORD delay category, accounting for 32.9% of 31,489 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.9%
Late aircraft32.9%
National airspace30.9%
Weather9.2%
Security0.1%
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.