University of Illinois/Willard in April 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 April 2024, reporting carriers scheduled 120 domestic departures from University of Illinois/Willard (CMI). 82.5% left less than 15 minutes late and 83.3% reached their destination on time; 0.8% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.2% arrived on time, so CMI departures were 2.0 points above the national departure figure.

Flights arriving at CMI that month were on time 78.3% of the time (120 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 54%, air carrier 37% and national aviation system 9%.

On time 83.3%
Arrived 15+ minutes late 15.8%
Cancelled 0.8%
Diverted 0.0%

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

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

Measure	Apr 2024	Year earlier	CMI, 12 months to Jul 2026	All reported flights, Apr 2024
Departed on time	82.5%	—	79.7%	80.5%
Arrived on time	83.3%	—	77.6%	80.2%
Cancelled	0.8%	—	3.0%	0.7%
Average departure delay (late minutes only)	25.3 min	—	18.0 min	14.2 min
Scheduled departures a day	4	—	5	19,406
Scheduled departures	120	—	1,785	582,185

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	120	100%	83.3%	14.9 min	0.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	60	78.3%	4.2 min	1.7%
CMI–ORD	Champaign/Urbana to Chicago	60	88.3%	25.4 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), April 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2024	Minutes
Air carrier	37.4%	33.6%	1,104
Late-arriving aircraft	53.7%	41.0%	1,585
National Aviation System	8.8%	20.0%	260
Extreme weather	0.2%	5.1%	5
Security	0.0%	0.2%	0

2,954 delay minutes on 19 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 April 2024?

82.5% of 120 scheduled domestic departures left less than 15 minutes late, and 83.3% reached their destination on time. The national figures that month were 80.5% and 80.2%.

How does that compare with a year earlier?

April 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 April 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.