University of Illinois/Willard in June 2025

75.8%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 June 2025, reporting carriers scheduled 132 domestic departures from University of Illinois/Willard (CMI). 75.8% left less than 15 minutes late and 71.2% reached their destination on time; 1.5% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so CMI departures were 4.4 points above the national departure figure.

A year earlier, in June 2024, the airport had 116 departures with 75.0% leaving on time: a change of +0.8 points, with flights up 14%.

Flights arriving at CMI that month were on time 65.9% of the time (132 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 52%, air carrier 31% and national aviation system 18%.

On time 71.2%
Arrived 15+ minutes late 27.3%
Cancelled 1.5%
Diverted 0.0%

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

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

Measure	Jun 2025	Jun 2024	CMI, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	75.8%	75.0%	79.7%	71.4%
Arrived on time	71.2%	76.7%	77.6%	70.3%
Cancelled	1.5%	0.0%	3.0%	1.6%
Average departure delay (late minutes only)	33.5 min	28.8 min	18.0 min	22.1 min
Scheduled departures a day	4	4	5	20,386
Scheduled departures	132	116	1,785	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	132	100%	71.2%	26.3 min	1.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–ORD	Champaign/Urbana to Chicago	72	73.6%	8.9 min	1.4%
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	60	68.3%	47.2 min	1.7%

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), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	30.5%	31.6%	1,397
Late-arriving aircraft	51.6%	40.6%	2,362
National Aviation System	17.9%	20.9%	818
Extreme weather	0.1%	6.9%	4
Security	0.0%	0.2%	0

4,581 delay minutes on 36 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 June 2025?

75.8% of 132 scheduled domestic departures left less than 15 minutes late, and 71.2% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 75.0% of 116 departures left on time and 0.0% were cancelled, against 75.8% and 1.5% in June 2025.

Provenance

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