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218 km · Domestic

University of Illinois Willard (CMI) – Chicago O'Hare (ORD)

In July 2026, 179 flights operated between University of Illinois Willard and Chicago O'Hare (both directions), and 79.3% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January104172▲ 65.4%
February98160▲ 63.3%
March108157▲ 45.4%
April162165▲ 1.9%
May176178▲ 1.1%
June142172▲ 21.1%
July132179▲ 35.6%
August162––
September136––
October206–in progress
November186––
December182––
Year to date (Jan–Jul)9221,183▲ 28.3%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January80.8%68.6%▼ 15.1%
February70.4%77.5%▲ 10.1%
March77.8%79.6%▲ 2.3%
April90.7%75.8%▼ 16.4%
May87.5%84.3%▼ 3.7%
June69.7%74.4%▲ 6.7%
July65.9%79.3%▲ 20.3%
August77.8%––
September87.5%––
October76.2%–in progress
November82.3%––
December61.5%––
Year-to-date average (Jan–Jul)77.5%77.1%▼ 0.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January02–
February60▼ 100.0%
March011–
April27▲ 250.0%
May12▲ 100.0%
June28▲ 300.0%
July67▲ 16.7%
August6––
September0––
October0–in progress
November22––
December12––
Year to date (Jan–Jul)1737▲ 117.6%

By direction

CMI → ORD

Scheduled flights
1,630
Flights operated
1,583
Cancelled
47 · 2.9%
On-time departures
81.7%

ORD → CMI

Scheduled flights
1,628
Flights operated
1,581
Cancelled
47 · 2.9%
On-time departures
74.2%

CMI → ORD and ORD → CMI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Envoy Air MQ 3,258 100.0% 77.9% 94

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay09:00–10:008.3min · 323 recorded · 319 measured
Gap to highest-delay hour15.4min09:00 ↔ 19:00
Recorded flights3,258CMI–ORD

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 06:00 · 89.3% · 494 recorded · 486 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 53 recorded · 53 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 47 recorded · 45 measured · Source: the US BTS 09:00 · 83.1% · 323 recorded · 319 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 135 recorded · 134 measured · Source: the US BTS 11:00 · 81.3% · 377 recorded · 374 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 116 recorded · 114 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 144 recorded · 142 measured · Source: the US BTS 14:00 · 81.7% · 218 recorded · 213 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 51 recorded · 47 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 121 recorded · 118 measured · Source: the US BTS 17:00 · 71.2% · 239 recorded · 233 measured · Source: the US BTS 18:00 · 66.8% · 256 recorded · 232 measured · Source: the US BTS 19:00 · 57.7% · 210 recorded · 201 measured · Source: the US BTS 20:00 · 71.3% · 449 recorded · 428 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 06:00 · 14.3 min · 494 recorded · 486 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 53 recorded · 53 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 47 recorded · 45 measured · Source: the US BTS 09:00 · 8.3 min · 323 recorded · 319 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 135 recorded · 134 measured · Source: the US BTS 11:00 · 9.8 min · 377 recorded · 374 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 116 recorded · 114 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 144 recorded · 142 measured · Source: the US BTS 14:00 · 10.8 min · 218 recorded · 213 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 51 recorded · 47 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 121 recorded · 118 measured · Source: the US BTS 17:00 · 15.1 min · 239 recorded · 233 measured · Source: the US BTS 18:00 · 19.1 min · 256 recorded · 232 measured · Source: the US BTS 19:00 · 23.7 min · 210 recorded · 201 measured · Source: the US BTS 20:00 · 18.9 min · 449 recorded · 428 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 25 · 25 recorded · 25 measured · Source: the US BTS 06:00 · 494 · 494 recorded · 486 measured · Source: the US BTS 07:00 · 53 · 53 recorded · 53 measured · Source: the US BTS 08:00 · 47 · 47 recorded · 45 measured · Source: the US BTS 09:00 · 323 · 323 recorded · 319 measured · Source: the US BTS 10:00 · 135 · 135 recorded · 134 measured · Source: the US BTS 11:00 · 377 · 377 recorded · 374 measured · Source: the US BTS 12:00 · 116 · 116 recorded · 114 measured · Source: the US BTS 13:00 · 144 · 144 recorded · 142 measured · Source: the US BTS 14:00 · 218 · 218 recorded · 213 measured · Source: the US BTS 15:00 · 51 · 51 recorded · 47 measured · Source: the US BTS 16:00 · 121 · 121 recorded · 118 measured · Source: the US BTS 17:00 · 239 · 239 recorded · 233 measured · Source: the US BTS 18:00 · 256 · 256 recorded · 232 measured · Source: the US BTS 19:00 · 210 · 210 recorded · 201 measured · Source: the US BTS 20:00 · 449 · 449 recorded · 428 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—2525
06:0089.3%14.3 min486494
07:00Fewer than 200 measured departures—5353
08:00Fewer than 200 measured departures—4547
09:0083.1%8.3 min319323
10:00Fewer than 200 measured departures—134135
11:0081.3%9.8 min374377
12:00Fewer than 200 measured departures—114116
13:00Fewer than 200 measured departures—142144
14:0081.7%10.8 min213218
15:00Fewer than 200 measured departures—4751
16:00Fewer than 200 measured departures—118121
17:0071.2%15.1 min233239
18:0066.8%19.1 min232256
19:0057.7%23.7 min201210
20:0071.3%18.9 min428449
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.9% · 497 recorded · 482 measured · Source: the US BTS Tuesday · 79.9% · 311 recorded · 308 measured · Source: the US BTS Wednesday · 79.9% · 466 recorded · 453 measured · Source: the US BTS Thursday · 73.7% · 505 recorded · 491 measured · Source: the US BTS Friday · 77.2% · 500 recorded · 483 measured · Source: the US BTS Saturday · 80.8% · 467 recorded · 452 measured · Source: the US BTS Sunday · 75.4% · 512 recorded · 495 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 13.6 min · 497 recorded · 482 measured · Source: the US BTS Tuesday · 10.7 min · 311 recorded · 308 measured · Source: the US BTS Wednesday · 11.3 min · 466 recorded · 453 measured · Source: the US BTS Thursday · 14.9 min · 505 recorded · 491 measured · Source: the US BTS Friday · 11.9 min · 500 recorded · 483 measured · Source: the US BTS Saturday · 12.2 min · 467 recorded · 452 measured · Source: the US BTS Sunday · 20.2 min · 512 recorded · 495 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 497 · 497 recorded · 482 measured · Source: the US BTS Tuesday · 311 · 311 recorded · 308 measured · Source: the US BTS Wednesday · 466 · 466 recorded · 453 measured · Source: the US BTS Thursday · 505 · 505 recorded · 491 measured · Source: the US BTS Friday · 500 · 500 recorded · 483 measured · Source: the US BTS Saturday · 467 · 467 recorded · 452 measured · Source: the US BTS Sunday · 512 · 512 recorded · 495 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.9%13.6 min482497
Tuesday79.9%10.7 min308311
Wednesday79.9%11.3 min453466
Thursday73.7%14.9 min491505
Friday77.2%11.9 min483500
Saturday80.8%12.2 min452467
Sunday75.4%20.2 min495512

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 73.2% · 278 recorded · 276 measured · Source: the US BTS Feb · 74.8% · 264 recorded · 258 measured · Source: the US BTS Mar · 78.9% · 276 recorded · 265 measured · Source: the US BTS Apr · 83.2% · 336 recorded · 327 measured · Source: the US BTS May · 85.9% · 357 recorded · 354 measured · Source: the US BTS Jun · 72.3% · 324 recorded · 314 measured · Source: the US BTS Jul · 73.6% · 324 recorded · 311 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 168 recorded · 162 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 136 recorded · 136 measured · Source: the US BTS Oct · 80.6% · 278 recorded · 278 measured · Source: the US BTS Nov · 83.7% · 268 recorded · 246 measured · Source: the US BTS Dec · 65.4% · 249 recorded · 237 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 17.2 min · 278 recorded · 276 measured · Source: the US BTS Feb · 17.4 min · 264 recorded · 258 measured · Source: the US BTS Mar · 13.6 min · 276 recorded · 265 measured · Source: the US BTS Apr · 9.9 min · 336 recorded · 327 measured · Source: the US BTS May · 7.0 min · 357 recorded · 354 measured · Source: the US BTS Jun · 20.9 min · 324 recorded · 314 measured · Source: the US BTS Jul · 17.7 min · 324 recorded · 311 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 168 recorded · 162 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 136 recorded · 136 measured · Source: the US BTS Oct · 8.2 min · 278 recorded · 278 measured · Source: the US BTS Nov · 9.2 min · 268 recorded · 246 measured · Source: the US BTS Dec · 26.3 min · 249 recorded · 237 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 278 · 278 recorded · 276 measured · Source: the US BTS Feb · 264 · 264 recorded · 258 measured · Source: the US BTS Mar · 276 · 276 recorded · 265 measured · Source: the US BTS Apr · 336 · 336 recorded · 327 measured · Source: the US BTS May · 357 · 357 recorded · 354 measured · Source: the US BTS Jun · 324 · 324 recorded · 314 measured · Source: the US BTS Jul · 324 · 324 recorded · 311 measured · Source: the US BTS Aug · 168 · 168 recorded · 162 measured · Source: the US BTS Sep · 136 · 136 recorded · 136 measured · Source: the US BTS Oct · 278 · 278 recorded · 278 measured · Source: the US BTS Nov · 268 · 268 recorded · 246 measured · Source: the US BTS Dec · 249 · 249 recorded · 237 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan73.2%17.2 min276278
Feb74.8%17.4 min258264
Mar78.9%13.6 min265276
Apr83.2%9.9 min327336
May85.9%7.0 min354357
Jun72.3%20.9 min314324
Jul73.6%17.7 min311324
AugFewer than 200 measured departures—162168
SepFewer than 200 measured departures—136136
Oct80.6%8.2 min278278
Nov83.7%9.2 min246268
Dec65.4%26.3 min237249

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 75.7% 2,466
  • Delayed >15 min 21.4% 698
  • Cancelled 2.9% 94
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

29
29 of 29
Flight numbersBy direction DeparturesOn time
MQ3694 ORD → CMI 542 67.8%
MQ3609 CMI → ORD 315 90.6%
MQ3421 CMI → ORD 238 88.1%
MQ3492 CMI → ORD 181 82.2%
MQ3492 ORD → CMI 181 81.8%
MQ3959 ORD → CMI 134 77.5%
MQ3484 CMI → ORD 115 68.5%
MQ3477 CMI → ORD 91 72.9%
MQ3484 ORD → CMI 87 68.6%
MQ3349 ORD → CMI 78 62.3%
MQ3349 CMI → ORD 78 83.1%
MQ3476 ORD → CMI 72 83.3%
MQ3476 CMI → ORD 72 80.6%
MQ3477 ORD → CMI 72 69.1%
MQ3536 CMI → ORD 70 73.4%
MQ4011 CMI → ORD 65 79.4%
MQ4298 CMI → ORD 61 60.8%
MQ4298 ORD → CMI 59 65.3%
MQ3529 CMI → ORD 44 88.6%
MQ3529 ORD → CMI 44 90.9%
MQ4002 ORD → CMI 37 63.9%
MQ4002 CMI → ORD 36 62.9%
MQ4000 ORD → CMI 33 74.2%
MQ4000 CMI → ORD 32 73.3%
MQ3877 CMI → ORD 31 93.6%
MQ3877 ORD → CMI 31 100.0%
MQ3991 CMI → ORD 31 90.3%
MQ3991 ORD → CMI 31 96.8%
MQ3536 ORD → CMI 30 79.3%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 179 +35.6% 7 79.3%
June 2026 172 +21.1% 8 74.4%
May 2026 178 +1.1% 2 84.3%
April 2026 165 +1.9% 7 75.8%
March 2026 157 +45.4% 11 79.6%
February 2026 160 +63.3% 0 77.5%
January 2026 172 +65.4% 2 68.6%
December 2025 182 +230.9% 12 61.5%
November 2025 186 +210.0% 22 82.3%
October 2025 206 +186.1% 0 76.2%
September 2025 136 0 87.5%
August 2025 162 6 77.8%
July 2025 132 6 65.9%
June 2025 142 2 69.7%
May 2025 176 1 87.5%
April 2025 162 2 90.7%
March 2025 108 0 77.8%
February 2025 98 6 70.4%
January 2025 104 0 80.8%
December 2024 55 0 78.2%
November 2024 60 0 88.3%
October 2024 72 0 93.1%

How to read this chart

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