University of Illinois/Willard in August 2024

82.5%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 2024, reporting carriers scheduled 126 domestic departures from University of Illinois/Willard (CMI). 82.5% left less than 15 minutes late and 85.7% reached their destination on time; 0.0% were cancelled.

Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so CMI departures were 7.1 points above the national departure figure.

A year earlier, in August 2023, the airport had 118 departures with 90.7% leaving on time: a change of −8.2 points, with flights up 7%.

Flights arriving at CMI that month were on time 74.6% of the time (126 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 57%, air carrier 27% and extreme weather 13%.

On time 85.7%
Arrived 15+ minutes late 14.3%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from CMI in August 2024, judged by arrival at the destination.

August 2024 against a year earlier, the airport's year and the nation

Measure	Aug 2024	Aug 2023	CMI, 12 months to Jul 2026	All reported flights, Aug 2024
Departed on time	82.5%	90.7%	79.7%	75.4%
Arrived on time	85.7%	92.4%	77.6%	74.7%
Cancelled	0.0%	0.8%	3.0%	2.1%
Average departure delay (late minutes only)	12.8 min	11.8 min	18.0 min	18.4 min
Scheduled departures a day	4	4	5	20,634
Scheduled departures	126	118	1,785	619,025

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	126	100%	85.7%	-1.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–ORD	Champaign/Urbana to Chicago	64	79.7%	5.8 min	0.0%
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	62	91.9%	-8.8 min	0.0%

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 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2024	Minutes
Air carrier	27.2%	33.8%	340
Late-arriving aircraft	57.4%	39.8%	718
National Aviation System	2.6%	20.4%	33
Extreme weather	12.7%	5.9%	159
Security	0.0%	0.1%	0

1,250 delay minutes on 18 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 2024?

82.5% of 126 scheduled domestic departures left less than 15 minutes late, and 85.7% reached their destination on time. The national figures that month were 75.4% and 74.7%.

How does that compare with a year earlier?

In August 2023, 90.7% of 118 departures left on time and 0.8% were cancelled, against 82.5% and 0.0% in August 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2024; 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.