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Route Reliability

Chicago → Greenville

ORD–GSP · 577 miles · Chicago O'Hare International Airport to Greenville–Spartanburg International Airport

63
A Little Dicey
WanderNerd Reliability Score
73%
Arrive within 15 minutes
13 min
Average arrival delay
3.9%
Cancelled
2,057
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines75%1,103 flights
  2. 2.American Airlines71%954 flights

What the data says

Morning flights do better here.

ORD–GSP flights departing between 6–9 AM arrived on time 83% of the time, versus 54% between 9 PM–12 AM.

Monday is the weak spot.

ORD–GSP flights arrived on time 77% of the time on Tuesdays. On Mondays: 68%.

United Airlines has a slight edge here.

United Airlines arrived on time 75% of the time on this route; American Airlines managed 71%.

Keep a backup plan handy.

This route was cancelled 3.9% of the time. Typical for U.S. flights is around 1–2%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon68%(292 flights)
  • Tue77%(276 flights)
  • Wed72%(286 flights)
  • Thu74%(303 flights)
  • Fri75%(296 flights)
  • Sat72%(231 flights)
  • Sun71%(287 flights)
On-time by departure window
  • 12–3 AM—(1 flights)
  • 6–9 AM83%(616 flights)
  • 9 AM–12 PM76%(67 flights)
  • 12–3 PM71%(360 flights)
  • 3–6 PM71%(478 flights)
  • 6–9 PM63%(412 flights)
  • 9 PM–12 AM54%(37 flights)
On-time trend by month
81%
May

Jun 63% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%159
July 202565%165
August 202578%151
September 202582%157
October 202571%199
November 202574%148
December 202566%163
January 202667%137
February 202674%132
March 202669%160
April 202680%199
May 202681%201

Keep nerding

Based on 2,057 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.