PlainFlights

Route · GSP → ORD · 2020–2025 BTS data

Greer to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), GSP to ORD (Greer to Chicago) ranks #1912 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

81.7%
On-time
+2.7 pts
vs US avg
77 min
Delay when late
6,603
Flights
#1912 of 4927
Corpus placement

Cancelled

1.9%

Best Month

Feb 2025 91%

Worst Month

Jul 2025 62%

Distance

577 mi

Carriers

24

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 140 51 6 2 YX,OH,MQ,OO
Nov 2025 166 42 16 0 OO,MQ,OH,YX
Oct 2025 173 33 0 1 OH,OO,YX,MQ
Sep 2025 128 15 2 0 MQ,OH,OO,YX
Aug 2025 147 25 6 0 OO,YX,MQ,OH
Jul 2025 170 64 2 0 OH,OO,YX,MQ
Jun 2025 125 32 2 0 OH,OO,YX,MQ
May 2025 109 21 0 0 OO,UA,YX,MQ
Apr 2025 86 13 2 0 MQ,OO,UA
Mar 2025 110 23 2 2 YX,OO,UA,MQ
Feb 2025 75 7 0 0 OO,YX,MQ
Jan 2025 90 9 3 0 YX,OO,MQ
Dec 2024 120 29 0 0 MQ,OO,YX
Nov 2024 120 22 1 0 YX,MQ
Oct 2024 146 27 0 0 UA,MQ,YX
Sep 2024 123 21 2 0 YX,OO,UA,MQ
Aug 2024 140 41 0 1 MQ,YX,OO,UA
Jul 2024 137 39 2 2 MQ,OO,YX
Jun 2024 122 37 3 1 MQ,OO,YX
May 2024 145 36 1 0 MQ,YX,OO,UA
Apr 2024 116 17 0 0 MQ,OO
Mar 2024 94 13 0 0 MQ,YX,OO,UA
Feb 2024 87 10 0 0 MQ,OO,UA
Jan 2024 92 10 6 1 MQ,YX,OO

GSP–ORD seasonal on-time pattern

Best: September (88.7%) · weakest: July (71.9%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 78%

Strongest calendar month

September

88.7% on-time · ~95 flights/mo

Busiest calendar month

October

~115 flights/mo avg

Weakest calendar month

July

71.9% on-time · ~108 flights/mo

Cancellation Rate

1.9%

56 of 2,961 flights

Diversion Rate

0.3%

10 of 2,961 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

GSP - Greer

Full on-time, delay-cause, and seasonal performance for Greer, SC.

GSP on-time profile

ORD - Chicago

Full on-time, delay-cause, and seasonal performance for Chicago, IL.

ORD on-time profile

Compare the two airports

See GSP and ORD side by side on delays, cancellations, and reliability.

Compare GSP vs ORD

Origin-hub reliability standing

Mid-pack among GSP departures

From GSP, this corridor sits with 5 other 75–85% on-time routes out of 14 tracked departures, not the hub's reliability leaders (9 at ≥85%) and not the softest ( 0 below 75%). Destination: Chicago · fleet on-time rank #2470 of 4927.

What the Data Says About GSP to ORD

6,603 tracked flights put the GSP to ORD pairing (Greer to Chicago) at a 81.7% on-time rate, squarely in line with the wider network. Delays that do occur run 76.6 minutes on average. Across the 577-mile route and its 24 carriers, the trailing 24 months show 1.9% cancelled and 0.3% diverted (2,961 flights sampled).

The monthly split is wide on this route: Feb 2025 posted the strongest performance at 91% on-time, while Jul 2025 came in at just 62% - a 28-point swing worth factoring into travel timing.

On the multi-year calendar, GSP–ORD peaks in September at 88.7% on-time while October carries the heaviest traffic (~115 flights per month) ; the softest month is July at 71.9%, a 16.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does GSP to ORD rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, GSP to ORD ranks #1912 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from GSP to ORD? ▼
Flights from Greer to Chicago have a 81.7% on-time rate based on 6,603 flights. The average delay is 76.6 minutes. The best recent month was Feb 2025 with 91% on-time.
What is the cancellation rate for GSP to ORD? ▼
Over the last 24 months, 1.9% of flights on this route were cancelled (56 of 2,961 flights) and 0.3% were diverted.
How far is the flight from GSP to ORD? ▼
The flight distance from Greer (GSP) to Chicago (ORD) is approximately 577 miles. This route is served by 24 carriers.
When is the best time to fly from GSP to ORD? ▼
The best recent month for on-time performance was Feb 2025 (91% on-time). The worst was Jul 2025 (62% on-time). Consider booking during months with historically better performance.

Airports on this route

GSP Airport

Greer
ORD Airport

Chicago
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using GSP–ORD data

GSP–ORD is mid-pack at 81.7% on-time; month and carrier mix move more than the corridor headline.

  • Compare GSP and ORD airport profiles: delay causes and top routes differ even on the same corridor. GSP airport
  • If your dates flex, September (88.7% on-time) beats July (71.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 81.7% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.