Countries › United States › Ontario › ONT Ontario (ONT) ONT / KONT
621,311
Ontario International Airport handled 621,311 passengers in May 2026, down 0.0% 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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Domestic / International May 2026 Domestic 91.1% 566,241 International 8.9% 55,070 Against 2019 +32.2% same month, before the pandemic
International share 9% of passengers in May 2026
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 621,311 −0.0% US Bureau of Transportation Statistics Open this month → April 2026 560,825 −1.3% US Bureau of Transportation Statistics Open this month → March 2026 562,753 +2.2% US Bureau of Transportation Statistics Open this month → February 2026 469,152 +5.6% US Bureau of Transportation Statistics Open this month → January 2026 486,413 +1.1% US Bureau of Transportation Statistics Open this month → December 2025 600,255 −1.6% US Bureau of Transportation Statistics Open this month → November 2025 583,085 −2.0% US Bureau of Transportation Statistics Open this month → October 2025 628,369 −2.7% US Bureau of Transportation Statistics Open this month → September 2025 592,706 −1.2% US Bureau of Transportation Statistics Open this month → August 2025 634,932 −0.1% US Bureau of Transportation Statistics Open this month → July 2025 671,564 +0.3% US Bureau of Transportation Statistics Open this month → June 2025 650,637 −0.5% US Bureau of Transportation Statistics Open this month → May 2025 621,593 +0.8% US Bureau of Transportation Statistics Open this month → April 2025 568,043 −0.7% US Bureau of Transportation Statistics Open this month → March 2025 550,588 −1.5% US Bureau of Transportation Statistics Open this month → February 2025 444,280 −1.9% US Bureau of Transportation Statistics Open this month → January 2025 481,352 +2.0% US Bureau of Transportation Statistics Open this month → December 2024 609,865 +9.8% US Bureau of Transportation Statistics Open this month → November 2024 594,827 +3.2% US Bureau of Transportation Statistics Open this month → October 2024 645,672 +6.1% US Bureau of Transportation Statistics Open this month → September 2024 599,992 +8.1% US Bureau of Transportation Statistics Open this month → August 2024 635,265 +11.2% US Bureau of Transportation Statistics July 2024 669,404 +14.9% US Bureau of Transportation Statistics June 2024 654,038 +17.0% 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 05:00–06:00 0.5min · 2,799 recorded · 2,788 measured
Gap to highest-delay hour 17.0min 05:00 ↔ 14:00
Recorded flights 47,625 Ontario International Airport
Departure hour Day of week Month of year
Departure hour On-time departures 100.0 50.0 0.0
00:00 · 78.2% · 298 recorded · 293 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 · 95.3% · 2,799 recorded · 2,788 measured · Source: BTS · US Department of Transportation 06:00 · 93.8% · 6,932 recorded · 6,894 measured · Source: BTS · US Department of Transportation 07:00 · 93.5% · 2,793 recorded · 2,762 measured · Source: BTS · US Department of Transportation 08:00 · 91.3% · 2,373 recorded · 2,356 measured · Source: BTS · US Department of Transportation 09:00 · 90.7% · 2,160 recorded · 2,147 measured · Source: BTS · US Department of Transportation 10:00 · 84.3% · 3,341 recorded · 3,313 measured · Source: BTS · US Department of Transportation 11:00 · 85.4% · 2,715 recorded · 2,692 measured · Source: BTS · US Department of Transportation 12:00 · 79.8% · 2,935 recorded · 2,904 measured · Source: BTS · US Department of Transportation 13:00 · 77.5% · 3,492 recorded · 3,474 measured · Source: BTS · US Department of Transportation 14:00 · 72.9% · 2,118 recorded · 2,087 measured · Source: BTS · US Department of Transportation 15:00 · 72.9% · 1,973 recorded · 1,958 measured · Source: BTS · US Department of Transportation 16:00 · 77.3% · 2,707 recorded · 2,690 measured · Source: BTS · US Department of Transportation 17:00 · 80.3% · 2,325 recorded · 2,309 measured · Source: BTS · US Department of Transportation 18:00 · 72.5% · 2,431 recorded · 2,411 measured · Source: BTS · US Department of Transportation 19:00 · 75.0% · 1,837 recorded · 1,827 measured · Source: BTS · US Department of Transportation 20:00 · 69.5% · 1,382 recorded · 1,371 measured · Source: BTS · US Department of Transportation 21:00 · 68.4% · 820 recorded · 814 measured · Source: BTS · US Department of Transportation 22:00 · 84.8% · 1,312 recorded · 1,298 measured · Source: BTS · US Department of Transportation 23:00 · 81.5% · 882 recorded · 859 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 17.6 8.8 0.0
00:00 · 9.1 min · 298 recorded · 293 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 · 0.5 min · 2,799 recorded · 2,788 measured · Source: BTS · US Department of Transportation 06:00 · 2.2 min · 6,932 recorded · 6,894 measured · Source: BTS · US Department of Transportation 07:00 · 2.3 min · 2,793 recorded · 2,762 measured · Source: BTS · US Department of Transportation 08:00 · 4.4 min · 2,373 recorded · 2,356 measured · Source: BTS · US Department of Transportation 09:00 · 2.0 min · 2,160 recorded · 2,147 measured · Source: BTS · US Department of Transportation 10:00 · 9.4 min · 3,341 recorded · 3,313 measured · Source: BTS · US Department of Transportation 11:00 · 6.8 min · 2,715 recorded · 2,692 measured · Source: BTS · US Department of Transportation 12:00 · 11.7 min · 2,935 recorded · 2,904 measured · Source: BTS · US Department of Transportation 13:00 · 12.7 min · 3,492 recorded · 3,474 measured · Source: BTS · US Department of Transportation 14:00 · 17.6 min · 2,118 recorded · 2,087 measured · Source: BTS · US Department of Transportation 15:00 · 14.4 min · 1,973 recorded · 1,958 measured · Source: BTS · US Department of Transportation 16:00 · 12.6 min · 2,707 recorded · 2,690 measured · Source: BTS · US Department of Transportation 17:00 · 8.3 min · 2,325 recorded · 2,309 measured · Source: BTS · US Department of Transportation 18:00 · 15.5 min · 2,431 recorded · 2,411 measured · Source: BTS · US Department of Transportation 19:00 · 11.9 min · 1,837 recorded · 1,827 measured · Source: BTS · US Department of Transportation 20:00 · 16.4 min · 1,382 recorded · 1,371 measured · Source: BTS · US Department of Transportation 21:00 · 15.5 min · 820 recorded · 814 measured · Source: BTS · US Department of Transportation 22:00 · 13.0 min · 1,312 recorded · 1,298 measured · Source: BTS · US Department of Transportation 23:00 · 13.3 min · 882 recorded · 859 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 6,932 3,466 0
00:00 · 298 · 298 recorded · 293 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 · 2,799 · 2,799 recorded · 2,788 measured · Source: BTS · US Department of Transportation 06:00 · 6,932 · 6,932 recorded · 6,894 measured · Source: BTS · US Department of Transportation 07:00 · 2,793 · 2,793 recorded · 2,762 measured · Source: BTS · US Department of Transportation 08:00 · 2,373 · 2,373 recorded · 2,356 measured · Source: BTS · US Department of Transportation 09:00 · 2,160 · 2,160 recorded · 2,147 measured · Source: BTS · US Department of Transportation 10:00 · 3,341 · 3,341 recorded · 3,313 measured · Source: BTS · US Department of Transportation 11:00 · 2,715 · 2,715 recorded · 2,692 measured · Source: BTS · US Department of Transportation 12:00 · 2,935 · 2,935 recorded · 2,904 measured · Source: BTS · US Department of Transportation 13:00 · 3,492 · 3,492 recorded · 3,474 measured · Source: BTS · US Department of Transportation 14:00 · 2,118 · 2,118 recorded · 2,087 measured · Source: BTS · US Department of Transportation 15:00 · 1,973 · 1,973 recorded · 1,958 measured · Source: BTS · US Department of Transportation 16:00 · 2,707 · 2,707 recorded · 2,690 measured · Source: BTS · US Department of Transportation 17:00 · 2,325 · 2,325 recorded · 2,309 measured · Source: BTS · US Department of Transportation 18:00 · 2,431 · 2,431 recorded · 2,411 measured · Source: BTS · US Department of Transportation 19:00 · 1,837 · 1,837 recorded · 1,827 measured · Source: BTS · US Department of Transportation 20:00 · 1,382 · 1,382 recorded · 1,371 measured · Source: BTS · US Department of Transportation 21:00 · 820 · 820 recorded · 814 measured · Source: BTS · US Department of Transportation 22:00 · 1,312 · 1,312 recorded · 1,298 measured · Source: BTS · US Department of Transportation 23:00 · 882 · 882 recorded · 859 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 78.2% 9.1 min 293 298 01:00 No observations — — — 02:00 No observations — — — 03:00 No observations — — — 04:00 No observations — — — 05:00 95.3% 0.5 min 2,788 2,799 06:00 93.8% 2.2 min 6,894 6,932 07:00 93.5% 2.3 min 2,762 2,793 08:00 91.3% 4.4 min 2,356 2,373 09:00 90.7% 2.0 min 2,147 2,160 10:00 84.3% 9.4 min 3,313 3,341 11:00 85.4% 6.8 min 2,692 2,715 12:00 79.8% 11.7 min 2,904 2,935 13:00 77.5% 12.7 min 3,474 3,492 14:00 72.9% 17.6 min 2,087 2,118 15:00 72.9% 14.4 min 1,958 1,973 16:00 77.3% 12.6 min 2,690 2,707 17:00 80.3% 8.3 min 2,309 2,325 18:00 72.5% 15.5 min 2,411 2,431 19:00 75.0% 11.9 min 1,827 1,837 20:00 69.5% 16.4 min 1,371 1,382 21:00 68.4% 15.5 min 814 820 22:00 84.8% 13.0 min 1,298 1,312 23:00 81.5% 13.3 min 859 882
Day of week On-time departures 100.0 50.0 0.0
Monday · 81.5% · 7,413 recorded · 7,356 measured · Source: BTS · US Department of Transportation Tuesday · 86.7% · 6,408 recorded · 6,373 measured · Source: BTS · US Department of Transportation Wednesday · 86.0% · 6,317 recorded · 6,279 measured · Source: BTS · US Department of Transportation Thursday · 82.8% · 7,207 recorded · 7,153 measured · Source: BTS · US Department of Transportation Friday · 81.9% · 7,320 recorded · 7,238 measured · Source: BTS · US Department of Transportation Saturday · 86.1% · 5,726 recorded · 5,677 measured · Source: BTS · US Department of Transportation Sunday · 80.7% · 7,234 recorded · 7,171 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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Average departure delay 10.6 5.3 0.0
Monday · 10.3 min · 7,413 recorded · 7,356 measured · Source: BTS · US Department of Transportation Tuesday · 6.7 min · 6,408 recorded · 6,373 measured · Source: BTS · US Department of Transportation Wednesday · 6.4 min · 6,317 recorded · 6,279 measured · Source: BTS · US Department of Transportation Thursday · 8.9 min · 7,207 recorded · 7,153 measured · Source: BTS · US Department of Transportation Friday · 10.1 min · 7,320 recorded · 7,238 measured · Source: BTS · US Department of Transportation Saturday · 6.6 min · 5,726 recorded · 5,677 measured · Source: BTS · US Department of Transportation Sunday · 10.6 min · 7,234 recorded · 7,171 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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Recorded flights 7,413 3,707 0
Monday · 7,413 · 7,413 recorded · 7,356 measured · Source: BTS · US Department of Transportation Tuesday · 6,408 · 6,408 recorded · 6,373 measured · Source: BTS · US Department of Transportation Wednesday · 6,317 · 6,317 recorded · 6,279 measured · Source: BTS · US Department of Transportation Thursday · 7,207 · 7,207 recorded · 7,153 measured · Source: BTS · US Department of Transportation Friday · 7,320 · 7,320 recorded · 7,238 measured · Source: BTS · US Department of Transportation Saturday · 5,726 · 5,726 recorded · 5,677 measured · Source: BTS · US Department of Transportation Sunday · 7,234 · 7,234 recorded · 7,171 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 81.5% 10.3 min 7,356 7,413 Tuesday 86.7% 6.7 min 6,373 6,408 Wednesday 86.0% 6.4 min 6,279 6,317 Thursday 82.8% 8.9 min 7,153 7,207 Friday 81.9% 10.1 min 7,238 7,320 Saturday 86.1% 6.6 min 5,677 5,726 Sunday 80.7% 10.6 min 7,171 7,234
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 · 85.1% · 3,833 recorded · 3,763 measured · Source: BTS · US Department of Transportation Feb · 87.0% · 3,508 recorded · 3,488 measured · Source: BTS · US Department of Transportation Mar · 85.5% · 4,188 recorded · 4,155 measured · Source: BTS · US Department of Transportation Apr · 84.5% · 4,369 recorded · 4,353 measured · Source: BTS · US Department of Transportation May · 81.6% · 4,638 recorded · 4,607 measured · Source: BTS · US Department of Transportation Jun · 76.6% · 4,611 recorded · 4,567 measured · Source: BTS · US Department of Transportation Jul · 78.2% · 2,394 recorded · 2,365 measured · Source: BTS · US Department of Transportation Aug · 82.3% · 2,291 recorded · 2,273 measured · Source: BTS · US Department of Transportation Sep · 85.7% · 4,493 recorded · 4,475 measured · Source: BTS · US Department of Transportation Oct · 85.7% · 4,653 recorded · 4,636 measured · Source: BTS · US Department of Transportation Nov · 85.2% · 4,399 recorded · 4,339 measured · Source: BTS · US Department of Transportation Dec · 82.7% · 4,248 recorded · 4,226 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 14.8 7.4 0.0
Jan · 8.3 min · 3,833 recorded · 3,763 measured · Source: BTS · US Department of Transportation Feb · 5.2 min · 3,508 recorded · 3,488 measured · Source: BTS · US Department of Transportation Mar · 5.6 min · 4,188 recorded · 4,155 measured · Source: BTS · US Department of Transportation Apr · 7.3 min · 4,369 recorded · 4,353 measured · Source: BTS · US Department of Transportation May · 9.5 min · 4,638 recorded · 4,607 measured · Source: BTS · US Department of Transportation Jun · 14.2 min · 4,611 recorded · 4,567 measured · Source: BTS · US Department of Transportation Jul · 14.8 min · 2,394 recorded · 2,365 measured · Source: BTS · US Department of Transportation Aug · 10.0 min · 2,291 recorded · 2,273 measured · Source: BTS · US Department of Transportation Sep · 7.5 min · 4,493 recorded · 4,475 measured · Source: BTS · US Department of Transportation Oct · 7.0 min · 4,653 recorded · 4,636 measured · Source: BTS · US Department of Transportation Nov · 6.9 min · 4,399 recorded · 4,339 measured · Source: BTS · US Department of Transportation Dec · 9.9 min · 4,248 recorded · 4,226 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 4,653 2,327 0
Jan · 3,833 · 3,833 recorded · 3,763 measured · Source: BTS · US Department of Transportation Feb · 3,508 · 3,508 recorded · 3,488 measured · Source: BTS · US Department of Transportation Mar · 4,188 · 4,188 recorded · 4,155 measured · Source: BTS · US Department of Transportation Apr · 4,369 · 4,369 recorded · 4,353 measured · Source: BTS · US Department of Transportation May · 4,638 · 4,638 recorded · 4,607 measured · Source: BTS · US Department of Transportation Jun · 4,611 · 4,611 recorded · 4,567 measured · Source: BTS · US Department of Transportation Jul · 2,394 · 2,394 recorded · 2,365 measured · Source: BTS · US Department of Transportation Aug · 2,291 · 2,291 recorded · 2,273 measured · Source: BTS · US Department of Transportation Sep · 4,493 · 4,493 recorded · 4,475 measured · Source: BTS · US Department of Transportation Oct · 4,653 · 4,653 recorded · 4,636 measured · Source: BTS · US Department of Transportation Nov · 4,399 · 4,399 recorded · 4,339 measured · Source: BTS · US Department of Transportation Dec · 4,248 · 4,248 recorded · 4,226 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 85.1% 8.3 min 3,763 3,833 Feb 87.0% 5.2 min 3,488 3,508 Mar 85.5% 5.6 min 4,155 4,188 Apr 84.5% 7.3 min 4,353 4,369 May 81.6% 9.5 min 4,607 4,638 Jun 76.6% 14.2 min 4,567 4,611 Jul 78.2% 14.8 min 2,365 2,394 Aug 82.3% 10.0 min 2,273 2,291 Sep 85.7% 7.5 min 4,475 4,493 Oct 85.7% 7.0 min 4,636 4,653 Nov 85.2% 6.9 min 4,339 4,399 Dec 82.7% 9.9 min 4,226 4,248
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 82.8% 39,447 Delayed >15 min 16.4% 7,800 Cancelled 0.8% 378 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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