University of Illinois/Willard in January 2025

91.2%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 January 2025, reporting carriers scheduled 114 domestic departures from University of Illinois/Willard (CMI). 91.2% left less than 15 minutes late and 83.3% reached their destination on time; 1.8% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so CMI departures were 11.9 points above the national departure figure.

A year earlier, in January 2024, the airport had 123 departures with 63.4% leaving on time: a change of +27.8 points, with flights down 7%.

Flights arriving at CMI that month were on time 75.4% of the time (114 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 60%, late-arriving aircraft 24% and air carrier 16%.

On time 83.3%
Arrived 15+ minutes late 14.9%
Cancelled 1.8%
Diverted 0.0%

Every scheduled departure from CMI in January 2025, judged by arrival at the destination.

January 2025 against a year earlier, the airport's year and the nation

Measure	Jan 2025	Jan 2024	CMI, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	91.2%	63.4%	79.7%	79.3%
Arrived on time	83.3%	62.6%	77.6%	78.6%
Cancelled	1.8%	13.0%	3.0%	3.0%
Average departure delay (late minutes only)	7.1 min	25.8 min	18.0 min	14.0 min
Scheduled departures a day	4	4	5	17,992
Scheduled departures	114	123	1,785	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	114	100%	83.3%	-3.0 min	1.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	61	78.7%	-2.0 min	3.3%
CMI–ORD	Champaign/Urbana to Chicago	53	88.7%	-4.1 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), January 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2025	Minutes
Air carrier	15.6%	36.2%	153
Late-arriving aircraft	24.0%	34.7%	235
National Aviation System	60.3%	19.9%	590
Extreme weather	0.0%	9.1%	0
Security	0.0%	0.2%	0

978 delay minutes on 17 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 January 2025?

91.2% of 114 scheduled domestic departures left less than 15 minutes late, and 83.3% reached their destination on time. The national figures that month were 79.3% and 78.6%.

How does that compare with a year earlier?

In January 2024, 63.4% of 123 departures left on time and 13.0% were cancelled, against 91.2% and 1.8% in January 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 2025; 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.