University of Illinois/Willard in August 2023

90.7%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In August 2023, reporting carriers scheduled 118 domestic departures from University of Illinois/Willard (CMI). 90.7% left less than 15 minutes late and 92.4% reached their destination on time; 0.8% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so CMI departures were 14.0 points above the national departure figure.

Flights arriving at CMI that month were on time 82.2% of the time (118 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 79%, air carrier 19% and national aviation system 2%.

On time 92.4%
Arrived 15+ minutes late 6.8%
Cancelled 0.8%
Diverted 0.0%

Every scheduled departure from CMI in August 2023, judged by arrival at the destination.

August 2023 against a year earlier, the airport's year and the nation

Measure	Aug 2023	Year earlier	CMI, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	90.7%	—	79.7%	76.7%
Arrived on time	92.4%	—	77.6%	76.9%
Cancelled	0.8%	—	3.0%	1.5%
Average departure delay (late minutes only)	11.8 min	—	18.0 min	17.3 min
Scheduled departures a day	4	—	5	20,100
Scheduled departures	118	—	1,785	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	118	100%	92.4%	1.5 min	0.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	62	91.9%	6.2 min	0.0%
CMI–ORD	Champaign/Urbana to Chicago	56	92.9%	-3.8 min	1.8%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	19.2%	36.7%	236
Late-arriving aircraft	79.3%	42.2%	976
National Aviation System	1.5%	15.7%	18
Extreme weather	0.0%	5.1%	0
Security	0.0%	0.2%	0

1,230 delay minutes on 8 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left CMI on time in August 2023?

90.7% of 118 scheduled domestic departures left less than 15 minutes late, and 92.4% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for CMI · methodology · corrections.