University of Illinois/Willard in July 2025

75.6%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 July 2025, reporting carriers scheduled 131 domestic departures from University of Illinois/Willard (CMI). 75.6% left less than 15 minutes late and 74.8% reached their destination on time; 3.1% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so CMI departures were 5.9 points above the national departure figure.

A year earlier, in July 2024, the airport had 123 departures with 77.2% leaving on time: a change of −1.6 points, with flights up 7%.

Flights arriving at CMI that month were on time 68.7% of the time (131 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 63%, national aviation system 17% and air carrier 16%.

On time 74.8%
Arrived 15+ minutes late 22.1%
Cancelled 3.1%
Diverted 0.0%

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

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

Measure	Jul 2025	Jul 2024	CMI, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	75.6%	77.2%	79.7%	69.7%
Arrived on time	74.8%	78.0%	77.6%	69.0%
Cancelled	3.1%	0.8%	3.0%	2.5%
Average departure delay (late minutes only)	21.0 min	12.7 min	18.0 min	24.3 min
Scheduled departures a day	4	4	5	21,048
Scheduled departures	131	123	1,785	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	131	100%	74.8%	11.6 min	3.1%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–ORD	Champaign/Urbana to Chicago	69	65.2%	15.8 min	5.8%
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	62	85.5%	7.1 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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	15.7%	31.1%	424
Late-arriving aircraft	62.8%	40.8%	1,694
National Aviation System	17.1%	20.7%	460
Extreme weather	4.4%	7.3%	118
Security	0.0%	0.1%	0

2,696 delay minutes on 29 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 July 2025?

75.6% of 131 scheduled domestic departures left less than 15 minutes late, and 74.8% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 77.2% of 123 departures left on time and 0.8% were cancelled, against 75.6% and 3.1% in July 2025.

Provenance

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