University of Illinois/Willard in January 2024

63.4%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 2024, reporting carriers scheduled 123 domestic departures from University of Illinois/Willard (CMI). 63.4% left less than 15 minutes late and 62.6% reached their destination on time; 13.0% were cancelled.

Nationally that month, 74.0% of flights departed on time and 72.9% arrived on time, so CMI departures were 10.6 points below the national departure figure.

Flights arriving at CMI that month were on time 57.7% of the time (123 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, extreme weather 46%, late-arriving aircraft 34% and national aviation system 13%.

On time 62.6%
Arrived 15+ minutes late 24.4%
Cancelled 13.0%
Diverted 0.0%

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

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

Measure	Jan 2024	Year earlier	CMI, 12 months to Jul 2026	All reported flights, Jan 2024
Departed on time	63.4%	—	79.7%	74.0%
Arrived on time	62.6%	—	77.6%	72.9%
Cancelled	13.0%	—	3.0%	3.7%
Average departure delay (late minutes only)	25.8 min	—	18.0 min	18.7 min
Scheduled departures a day	4	—	5	18,242
Scheduled departures	123	—	1,785	547,271

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	123	100%	62.6%	15.6 min	13.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	62	64.5%	22.3 min	9.7%
CMI–ORD	Champaign/Urbana to Chicago	61	60.7%	8.3 min	16.4%

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 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2024	Minutes
Air carrier	6.8%	32.6%	190
Late-arriving aircraft	33.7%	39.0%	936
National Aviation System	13.3%	17.9%	369
Extreme weather	46.2%	10.3%	1,284
Security	0.0%	0.2%	0

2,779 delay minutes on 30 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 2024?

63.4% of 123 scheduled domestic departures left less than 15 minutes late, and 62.6% reached their destination on time. The national figures that month were 74.0% and 72.9%.

How does that compare with a year earlier?

January 2023 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 January 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.