University of Illinois/Willard in March 2025

80.2%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 March 2025, reporting carriers scheduled 116 domestic departures from University of Illinois/Willard (CMI). 80.2% left less than 15 minutes late and 76.7% reached their destination on time; 0.9% were cancelled.

Nationally that month, 79.9% of flights departed on time and 79.3% arrived on time, so CMI departures were level with the national departure figure.

A year earlier, in March 2024, the airport had 124 departures with 82.3% leaving on time: a change of −2.1 points, with flights down 6%.

Flights arriving at CMI that month were on time 81.0% of the time (116 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 57%, air carrier 21% and national aviation system 19%.

On time 76.7%
Arrived 15+ minutes late 22.4%
Cancelled 0.9%
Diverted 0.0%

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

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

Measure	Mar 2025	Mar 2024	CMI, 12 months to Jul 2026	All reported flights, Mar 2025
Departed on time	80.2%	82.3%	79.7%	79.9%
Arrived on time	76.7%	83.1%	77.6%	79.3%
Cancelled	0.9%	0.0%	3.0%	1.2%
Average departure delay (late minutes only)	18.4 min	24.8 min	18.0 min	14.9 min
Scheduled departures a day	4	4	5	20,029
Scheduled departures	116	124	1,785	600,872

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	116	100%	76.7%	10.6 min	0.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
CMI–DFW	Champaign/Urbana to Dallas/Fort Worth	62	77.4%	11.9 min	1.6%
CMI–ORD	Champaign/Urbana to Chicago	54	75.9%	9.1 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), March 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Mar 2025	Minutes
Air carrier	20.8%	33.0%	470
Late-arriving aircraft	57.4%	39.2%	1,294
National Aviation System	18.9%	21.9%	427
Extreme weather	2.8%	5.9%	64
Security	0.0%	0.1%	0

2,255 delay minutes on 26 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 March 2025?

80.2% of 116 scheduled domestic departures left less than 15 minutes late, and 76.7% reached their destination on time. The national figures that month were 79.9% and 79.3%.

How does that compare with a year earlier?

In March 2024, 82.3% of 124 departures left on time and 0.0% were cancelled, against 80.2% and 0.9% in March 2025.

Provenance

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