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15,259
University of Illinois Willard Airport handled 15,259 passengers in May 2026, down 3.3% on a year earlier, according to US Bureau of Transportation Statistics — T-100 Air Carrier Statistics .
Full count · domestic + international Flight timing & delays ↓
Passengers over time Showing 53 months. Full series runs 1990–2026 (437 periods).
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Against 2019 -19.4% same month, before the pandemic
Series depth 36 years from 1990
The most recent periods Open any period for the full breakdown. As published Newest first Oldest first Highest first Lowest first 24 of 24
Period Passengers Year on year Source May 2026 15,259 −3.3% US Bureau of Transportation Statistics Open this month → April 2026 14,823 +2.4% US Bureau of Transportation Statistics Open this month → March 2026 15,888 +14.8% US Bureau of Transportation Statistics Open this month → February 2026 13,292 +2.3% US Bureau of Transportation Statistics Open this month → January 2026 12,723 −3.6% US Bureau of Transportation Statistics Open this month → December 2025 13,804 +0.2% US Bureau of Transportation Statistics Open this month → November 2025 15,389 +2.9% US Bureau of Transportation Statistics Open this month → October 2025 18,057 +3.9% US Bureau of Transportation Statistics Open this month → September 2025 13,834 −15.7% US Bureau of Transportation Statistics Open this month → August 2025 14,402 −9.3% US Bureau of Transportation Statistics Open this month → July 2025 13,811 +0.6% US Bureau of Transportation Statistics Open this month → June 2025 13,605 +0.6% US Bureau of Transportation Statistics Open this month → May 2025 15,780 −2.1% US Bureau of Transportation Statistics Open this month → April 2025 14,477 −5.9% US Bureau of Transportation Statistics Open this month → March 2025 13,839 −1.9% US Bureau of Transportation Statistics Open this month → February 2025 12,997 +9.4% US Bureau of Transportation Statistics Open this month → January 2025 13,198 +43.3% US Bureau of Transportation Statistics Open this month → December 2024 13,776 +26.4% US Bureau of Transportation Statistics Open this month → November 2024 14,956 +22.4% US Bureau of Transportation Statistics Open this month → October 2024 17,383 +21.1% US Bureau of Transportation Statistics Open this month → September 2024 16,419 +25.5% US Bureau of Transportation Statistics Open this month → August 2024 15,887 +33.8% US Bureau of Transportation Statistics July 2024 13,722 +19.0% US Bureau of Transportation Statistics June 2024 13,523 +14.8% US Bureau of Transportation Statistics
Also tracked here: aircraft movements (through May 2026), tonnes of cargo (through May 2026).
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.
US domestic sectors recorded by BTS Source: BTS · US Department of Transportation · 2024-09-01 → 2026-06-30
Lowest average delay 11:00–12:00 8.2min · 319 recorded · 317 measured
Gap to highest-delay hour 13.8min 11:00 ↔ 07:00
Recorded flights 2,940 University of Illinois Willard Airport
Departure hour Day of week Month of year
Departure hour On-time departures 100.0 50.0 0.0
00:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 01:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 02:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 03:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 04:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 05:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: BTS · US Department of Transportation 06:00 · 88.9% · 896 recorded · 884 measured · Source: BTS · US Department of Transportation 07:00 · 87.4% · 289 recorded · 286 measured · Source: BTS · US Department of Transportation 08:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 09:00 · Fewer than 200 measured departures · 47 recorded · 45 measured · Source: BTS · US Department of Transportation 10:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: BTS · US Department of Transportation 11:00 · 82.7% · 319 recorded · 317 measured · Source: BTS · US Department of Transportation 12:00 · Fewer than 200 measured departures · 70 recorded · 69 measured · Source: BTS · US Department of Transportation 13:00 · Fewer than 200 measured departures · 57 recorded · 55 measured · Source: BTS · US Department of Transportation 14:00 · 81.4% · 271 recorded · 269 measured · Source: BTS · US Department of Transportation 15:00 · 81.1% · 568 recorded · 550 measured · Source: BTS · US Department of Transportation 16:00 · Fewer than 200 measured departures · 82 recorded · 81 measured · Source: BTS · US Department of Transportation 17:00 · Fewer than 200 measured departures · 31 recorded · 31 measured · Source: BTS · US Department of Transportation 18:00 · Fewer than 200 measured departures · 146 recorded · 136 measured · Source: BTS · US Department of Transportation 19:00 · Fewer than 200 measured departures · 63 recorded · 57 measured · Source: BTS · US Department of Transportation 20:00 · Fewer than 200 measured departures · 48 recorded · 41 measured · Source: BTS · US Department of Transportation 21:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 22:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 23:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
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Average departure delay 21.9 11.0 0.0
00:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 01:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 02:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 03:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 04:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 05:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: BTS · US Department of Transportation 06:00 · 13.9 min · 896 recorded · 884 measured · Source: BTS · US Department of Transportation 07:00 · 21.9 min · 289 recorded · 286 measured · Source: BTS · US Department of Transportation 08:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 09:00 · Fewer than 200 measured departures · 47 recorded · 45 measured · Source: BTS · US Department of Transportation 10:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: BTS · US Department of Transportation 11:00 · 8.2 min · 319 recorded · 317 measured · Source: BTS · US Department of Transportation 12:00 · Fewer than 200 measured departures · 70 recorded · 69 measured · Source: BTS · US Department of Transportation 13:00 · Fewer than 200 measured departures · 57 recorded · 55 measured · Source: BTS · US Department of Transportation 14:00 · 12.5 min · 271 recorded · 269 measured · Source: BTS · US Department of Transportation 15:00 · 11.1 min · 568 recorded · 550 measured · Source: BTS · US Department of Transportation 16:00 · Fewer than 200 measured departures · 82 recorded · 81 measured · Source: BTS · US Department of Transportation 17:00 · Fewer than 200 measured departures · 31 recorded · 31 measured · Source: BTS · US Department of Transportation 18:00 · Fewer than 200 measured departures · 146 recorded · 136 measured · Source: BTS · US Department of Transportation 19:00 · Fewer than 200 measured departures · 63 recorded · 57 measured · Source: BTS · US Department of Transportation 20:00 · Fewer than 200 measured departures · 48 recorded · 41 measured · Source: BTS · US Department of Transportation 21:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 22:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 23:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
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Recorded flights 896 448 0
00:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 01:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 02:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 03:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 04:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 05:00 · 52 · 52 recorded · 52 measured · Source: BTS · US Department of Transportation 06:00 · 896 · 896 recorded · 884 measured · Source: BTS · US Department of Transportation 07:00 · 289 · 289 recorded · 286 measured · Source: BTS · US Department of Transportation 08:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 09:00 · 47 · 47 recorded · 45 measured · Source: BTS · US Department of Transportation 10:00 · 1 · 1 recorded · 1 measured · Source: BTS · US Department of Transportation 11:00 · 319 · 319 recorded · 317 measured · Source: BTS · US Department of Transportation 12:00 · 70 · 70 recorded · 69 measured · Source: BTS · US Department of Transportation 13:00 · 57 · 57 recorded · 55 measured · Source: BTS · US Department of Transportation 14:00 · 271 · 271 recorded · 269 measured · Source: BTS · US Department of Transportation 15:00 · 568 · 568 recorded · 550 measured · Source: BTS · US Department of Transportation 16:00 · 82 · 82 recorded · 81 measured · Source: BTS · US Department of Transportation 17:00 · 31 · 31 recorded · 31 measured · Source: BTS · US Department of Transportation 18:00 · 146 · 146 recorded · 136 measured · Source: BTS · US Department of Transportation 19:00 · 63 · 63 recorded · 57 measured · Source: BTS · US Department of Transportation 20:00 · 48 · 48 recorded · 41 measured · Source: BTS · US Department of Transportation 21:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 22:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 23:00 · No observations · 0 recorded · 0 measured · Source: BTS · US Department of Transportation 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
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View the figures Departure hour On-time departures Average departure delay With departure time Recorded flights 00:00 No observations — — — 01:00 No observations — — — 02:00 No observations — — — 03:00 No observations — — — 04:00 No observations — — — 05:00 Fewer than 200 measured departures — 52 52 06:00 88.9% 13.9 min 884 896 07:00 87.4% 21.9 min 286 289 08:00 No observations — — — 09:00 Fewer than 200 measured departures — 45 47 10:00 Fewer than 200 measured departures — 1 1 11:00 82.7% 8.2 min 317 319 12:00 Fewer than 200 measured departures — 69 70 13:00 Fewer than 200 measured departures — 55 57 14:00 81.4% 12.5 min 269 271 15:00 81.1% 11.1 min 550 568 16:00 Fewer than 200 measured departures — 81 82 17:00 Fewer than 200 measured departures — 31 31 18:00 Fewer than 200 measured departures — 136 146 19:00 Fewer than 200 measured departures — 57 63 20:00 Fewer than 200 measured departures — 41 48 21:00 No observations — — — 22:00 No observations — — — 23:00 No observations — — —
Day of week On-time departures 100.0 50.0 0.0
Monday · 82.9% · 440 recorded · 432 measured · Source: BTS · US Department of Transportation Tuesday · 84.6% · 335 recorded · 330 measured · Source: BTS · US Department of Transportation Wednesday · 85.0% · 420 recorded · 412 measured · Source: BTS · US Department of Transportation Thursday · 82.8% · 438 recorded · 429 measured · Source: BTS · US Department of Transportation Friday · 83.6% · 437 recorded · 427 measured · Source: BTS · US Department of Transportation Saturday · 83.7% · 422 recorded · 411 measured · Source: BTS · US Department of Transportation Sunday · 80.8% · 448 recorded · 433 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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Average departure delay 21.4 10.7 0.0
Monday · 12.0 min · 440 recorded · 432 measured · Source: BTS · US Department of Transportation Tuesday · 8.0 min · 335 recorded · 330 measured · Source: BTS · US Department of Transportation Wednesday · 11.2 min · 420 recorded · 412 measured · Source: BTS · US Department of Transportation Thursday · 11.1 min · 438 recorded · 429 measured · Source: BTS · US Department of Transportation Friday · 12.8 min · 437 recorded · 427 measured · Source: BTS · US Department of Transportation Saturday · 14.2 min · 422 recorded · 411 measured · Source: BTS · US Department of Transportation Sunday · 21.4 min · 448 recorded · 433 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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Recorded flights 448 224 0
Monday · 440 · 440 recorded · 432 measured · Source: BTS · US Department of Transportation Tuesday · 335 · 335 recorded · 330 measured · Source: BTS · US Department of Transportation Wednesday · 420 · 420 recorded · 412 measured · Source: BTS · US Department of Transportation Thursday · 438 · 438 recorded · 429 measured · Source: BTS · US Department of Transportation Friday · 437 · 437 recorded · 427 measured · Source: BTS · US Department of Transportation Saturday · 422 · 422 recorded · 411 measured · Source: BTS · US Department of Transportation Sunday · 448 · 448 recorded · 433 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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View the figures Day of week On-time departures Average departure delay With departure time Recorded flights Monday 82.9% 12.0 min 432 440 Tuesday 84.6% 8.0 min 330 335 Wednesday 85.0% 11.2 min 412 420 Thursday 82.8% 11.1 min 429 438 Friday 83.6% 12.8 min 427 437 Saturday 83.7% 14.2 min 411 422 Sunday 80.8% 21.4 min 433 448
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 100.0 50.0 0.0
Jan · 85.6% · 263 recorded · 257 measured · Source: BTS · US Department of Transportation Feb · 85.8% · 244 recorded · 240 measured · Source: BTS · US Department of Transportation Mar · 80.9% · 262 recorded · 256 measured · Source: BTS · US Department of Transportation Apr · 83.9% · 288 recorded · 279 measured · Source: BTS · US Department of Transportation May · 86.2% · 301 recorded · 298 measured · Source: BTS · US Department of Transportation Jun · 77.7% · 277 recorded · 269 measured · Source: BTS · US Department of Transportation Jul · Fewer than 200 measured departures · 131 recorded · 127 measured · Source: BTS · US Department of Transportation Aug · Fewer than 200 measured departures · 146 recorded · 143 measured · Source: BTS · US Department of Transportation Sep · 86.5% · 245 recorded · 244 measured · Source: BTS · US Department of Transportation Oct · 86.9% · 283 recorded · 283 measured · Source: BTS · US Department of Transportation Nov · 86.6% · 252 recorded · 239 measured · Source: BTS · US Department of Transportation Dec · 74.9% · 248 recorded · 239 measured · Source: BTS · US Department of Transportation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Average departure delay 32.0 16.0 0.0
Jan · 9.7 min · 263 recorded · 257 measured · Source: BTS · US Department of Transportation Feb · 8.8 min · 244 recorded · 240 measured · Source: BTS · US Department of Transportation Mar · 12.8 min · 262 recorded · 256 measured · Source: BTS · US Department of Transportation Apr · 15.3 min · 288 recorded · 279 measured · Source: BTS · US Department of Transportation May · 8.3 min · 301 recorded · 298 measured · Source: BTS · US Department of Transportation Jun · 32.0 min · 277 recorded · 269 measured · Source: BTS · US Department of Transportation Jul · Fewer than 200 measured departures · 131 recorded · 127 measured · Source: BTS · US Department of Transportation Aug · Fewer than 200 measured departures · 146 recorded · 143 measured · Source: BTS · US Department of Transportation Sep · 12.2 min · 245 recorded · 244 measured · Source: BTS · US Department of Transportation Oct · 5.9 min · 283 recorded · 283 measured · Source: BTS · US Department of Transportation Nov · 6.8 min · 252 recorded · 239 measured · Source: BTS · US Department of Transportation Dec · 19.5 min · 248 recorded · 239 measured · Source: BTS · US Department of Transportation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Recorded flights 301 151 0
Jan · 263 · 263 recorded · 257 measured · Source: BTS · US Department of Transportation Feb · 244 · 244 recorded · 240 measured · Source: BTS · US Department of Transportation Mar · 262 · 262 recorded · 256 measured · Source: BTS · US Department of Transportation Apr · 288 · 288 recorded · 279 measured · Source: BTS · US Department of Transportation May · 301 · 301 recorded · 298 measured · Source: BTS · US Department of Transportation Jun · 277 · 277 recorded · 269 measured · Source: BTS · US Department of Transportation Jul · 131 · 131 recorded · 127 measured · Source: BTS · US Department of Transportation Aug · 146 · 146 recorded · 143 measured · Source: BTS · US Department of Transportation Sep · 245 · 245 recorded · 244 measured · Source: BTS · US Department of Transportation Oct · 283 · 283 recorded · 283 measured · Source: BTS · US Department of Transportation Nov · 252 · 252 recorded · 239 measured · Source: BTS · US Department of Transportation Dec · 248 · 248 recorded · 239 measured · Source: BTS · US Department of Transportation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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View the figures Month of year On-time departures Average departure delay With departure time Recorded flights Jan 85.6% 9.7 min 257 263 Feb 85.8% 8.8 min 240 244 Mar 80.9% 12.8 min 256 262 Apr 83.9% 15.3 min 279 288 May 86.2% 8.3 min 298 301 Jun 77.7% 32.0 min 269 277 Jul Fewer than 200 measured departures — 127 131 Aug Fewer than 200 measured departures — 143 146 Sep 86.5% 12.2 min 244 245 Oct 86.9% 5.9 min 283 283 Nov 86.6% 6.8 min 239 252 Dec 74.9% 19.5 min 239 248
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 81.4% 2,393 Delayed >15 min 16.4% 481 Cancelled 2.2% 66 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 punctuality and average delay.
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