Countries › United States › St Louis › STL St Louis St. Louis Lambert (STL) STL / KSTL
1,282,170
St. Louis Lambert International Airport handled 1,282,170 passengers in May 2026, down 7.4% 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 96.7% 1,239,819 International 3.3% 42,351 Against 2019 -11.3% same month, before the pandemic
International share 3% 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 1,282,170 −7.4% US Bureau of Transportation Statistics Open this month → April 2026 1,153,353 −5.5% US Bureau of Transportation Statistics Open this month → March 2026 1,263,459 −0.7% US Bureau of Transportation Statistics Open this month → February 2026 974,299 +3.8% US Bureau of Transportation Statistics Open this month → January 2026 981,078 +2.0% US Bureau of Transportation Statistics Open this month → December 2025 1,230,265 −4.9% US Bureau of Transportation Statistics Open this month → November 2025 1,182,899 −1.7% US Bureau of Transportation Statistics Open this month → October 2025 1,378,218 +2.2% US Bureau of Transportation Statistics Open this month → September 2025 1,280,331 −1.0% US Bureau of Transportation Statistics Open this month → August 2025 1,339,705 −2.7% US Bureau of Transportation Statistics Open this month → July 2025 1,447,370 −6.5% US Bureau of Transportation Statistics Open this month → June 2025 1,433,879 −6.5% US Bureau of Transportation Statistics Open this month → May 2025 1,384,442 −5.4% US Bureau of Transportation Statistics Open this month → April 2025 1,219,944 −5.9% US Bureau of Transportation Statistics Open this month → March 2025 1,272,811 −6.3% US Bureau of Transportation Statistics Open this month → February 2025 938,996 −9.4% US Bureau of Transportation Statistics Open this month → January 2025 961,764 −5.0% US Bureau of Transportation Statistics Open this month → December 2024 1,294,114 +6.0% US Bureau of Transportation Statistics Open this month → November 2024 1,203,840 −4.3% US Bureau of Transportation Statistics Open this month → October 2024 1,349,168 −3.3% US Bureau of Transportation Statistics Open this month → September 2024 1,293,788 +1.3% US Bureau of Transportation Statistics Open this month → August 2024 1,376,329 +4.7% US Bureau of Transportation Statistics July 2024 1,547,910 +6.0% US Bureau of Transportation Statistics June 2024 1,532,748 +8.3% 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 0.9min · 5,581 recorded · 5,518 measured
Gap to highest-delay hour 21.8min 05:00 ↔ 22:00
Recorded flights 116,668 St. Louis Lambert International 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 · 94.2% · 5,581 recorded · 5,518 measured · Source: BTS · US Department of Transportation 06:00 · 92.3% · 8,586 recorded · 8,450 measured · Source: BTS · US Department of Transportation 07:00 · 90.7% · 8,827 recorded · 8,712 measured · Source: BTS · US Department of Transportation 08:00 · 88.8% · 8,552 recorded · 8,482 measured · Source: BTS · US Department of Transportation 09:00 · 86.2% · 7,721 recorded · 7,613 measured · Source: BTS · US Department of Transportation 10:00 · 86.3% · 8,488 recorded · 8,420 measured · Source: BTS · US Department of Transportation 11:00 · 83.5% · 5,460 recorded · 5,375 measured · Source: BTS · US Department of Transportation 12:00 · 81.8% · 4,143 recorded · 4,098 measured · Source: BTS · US Department of Transportation 13:00 · 76.6% · 6,339 recorded · 6,272 measured · Source: BTS · US Department of Transportation 14:00 · 74.6% · 6,958 recorded · 6,870 measured · Source: BTS · US Department of Transportation 15:00 · 72.7% · 6,503 recorded · 6,393 measured · Source: BTS · US Department of Transportation 16:00 · 67.0% · 5,478 recorded · 5,400 measured · Source: BTS · US Department of Transportation 17:00 · 71.2% · 7,800 recorded · 7,675 measured · Source: BTS · US Department of Transportation 18:00 · 70.2% · 7,714 recorded · 7,597 measured · Source: BTS · US Department of Transportation 19:00 · 63.8% · 5,965 recorded · 5,887 measured · Source: BTS · US Department of Transportation 20:00 · 66.8% · 6,496 recorded · 6,428 measured · Source: BTS · US Department of Transportation 21:00 · 61.7% · 3,470 recorded · 3,429 measured · Source: BTS · US Department of Transportation 22:00 · 58.7% · 2,574 recorded · 2,542 measured · Source: BTS · US Department of Transportation 23:00 · Fewer than 200 measured departures · 13 recorded · 13 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 22.7 11.3 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 · 0.9 min · 5,581 recorded · 5,518 measured · Source: BTS · US Department of Transportation 06:00 · 4.0 min · 8,586 recorded · 8,450 measured · Source: BTS · US Department of Transportation 07:00 · 6.3 min · 8,827 recorded · 8,712 measured · Source: BTS · US Department of Transportation 08:00 · 5.3 min · 8,552 recorded · 8,482 measured · Source: BTS · US Department of Transportation 09:00 · 8.4 min · 7,721 recorded · 7,613 measured · Source: BTS · US Department of Transportation 10:00 · 6.8 min · 8,488 recorded · 8,420 measured · Source: BTS · US Department of Transportation 11:00 · 10.1 min · 5,460 recorded · 5,375 measured · Source: BTS · US Department of Transportation 12:00 · 10.5 min · 4,143 recorded · 4,098 measured · Source: BTS · US Department of Transportation 13:00 · 13.8 min · 6,339 recorded · 6,272 measured · Source: BTS · US Department of Transportation 14:00 · 14.7 min · 6,958 recorded · 6,870 measured · Source: BTS · US Department of Transportation 15:00 · 15.4 min · 6,503 recorded · 6,393 measured · Source: BTS · US Department of Transportation 16:00 · 20.8 min · 5,478 recorded · 5,400 measured · Source: BTS · US Department of Transportation 17:00 · 19.5 min · 7,800 recorded · 7,675 measured · Source: BTS · US Department of Transportation 18:00 · 17.4 min · 7,714 recorded · 7,597 measured · Source: BTS · US Department of Transportation 19:00 · 21.7 min · 5,965 recorded · 5,887 measured · Source: BTS · US Department of Transportation 20:00 · 18.0 min · 6,496 recorded · 6,428 measured · Source: BTS · US Department of Transportation 21:00 · 22.4 min · 3,470 recorded · 3,429 measured · Source: BTS · US Department of Transportation 22:00 · 22.7 min · 2,574 recorded · 2,542 measured · Source: BTS · US Department of Transportation 23:00 · Fewer than 200 measured departures · 13 recorded · 13 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 8,827 4,414 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 · 5,581 · 5,581 recorded · 5,518 measured · Source: BTS · US Department of Transportation 06:00 · 8,586 · 8,586 recorded · 8,450 measured · Source: BTS · US Department of Transportation 07:00 · 8,827 · 8,827 recorded · 8,712 measured · Source: BTS · US Department of Transportation 08:00 · 8,552 · 8,552 recorded · 8,482 measured · Source: BTS · US Department of Transportation 09:00 · 7,721 · 7,721 recorded · 7,613 measured · Source: BTS · US Department of Transportation 10:00 · 8,488 · 8,488 recorded · 8,420 measured · Source: BTS · US Department of Transportation 11:00 · 5,460 · 5,460 recorded · 5,375 measured · Source: BTS · US Department of Transportation 12:00 · 4,143 · 4,143 recorded · 4,098 measured · Source: BTS · US Department of Transportation 13:00 · 6,339 · 6,339 recorded · 6,272 measured · Source: BTS · US Department of Transportation 14:00 · 6,958 · 6,958 recorded · 6,870 measured · Source: BTS · US Department of Transportation 15:00 · 6,503 · 6,503 recorded · 6,393 measured · Source: BTS · US Department of Transportation 16:00 · 5,478 · 5,478 recorded · 5,400 measured · Source: BTS · US Department of Transportation 17:00 · 7,800 · 7,800 recorded · 7,675 measured · Source: BTS · US Department of Transportation 18:00 · 7,714 · 7,714 recorded · 7,597 measured · Source: BTS · US Department of Transportation 19:00 · 5,965 · 5,965 recorded · 5,887 measured · Source: BTS · US Department of Transportation 20:00 · 6,496 · 6,496 recorded · 6,428 measured · Source: BTS · US Department of Transportation 21:00 · 3,470 · 3,470 recorded · 3,429 measured · Source: BTS · US Department of Transportation 22:00 · 2,574 · 2,574 recorded · 2,542 measured · Source: BTS · US Department of Transportation 23:00 · 13 · 13 recorded · 13 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 94.2% 0.9 min 5,518 5,581 06:00 92.3% 4.0 min 8,450 8,586 07:00 90.7% 6.3 min 8,712 8,827 08:00 88.8% 5.3 min 8,482 8,552 09:00 86.2% 8.4 min 7,613 7,721 10:00 86.3% 6.8 min 8,420 8,488 11:00 83.5% 10.1 min 5,375 5,460 12:00 81.8% 10.5 min 4,098 4,143 13:00 76.6% 13.8 min 6,272 6,339 14:00 74.6% 14.7 min 6,870 6,958 15:00 72.7% 15.4 min 6,393 6,503 16:00 67.0% 20.8 min 5,400 5,478 17:00 71.2% 19.5 min 7,675 7,800 18:00 70.2% 17.4 min 7,597 7,714 19:00 63.8% 21.7 min 5,887 5,965 20:00 66.8% 18.0 min 6,428 6,496 21:00 61.7% 22.4 min 3,429 3,470 22:00 58.7% 22.7 min 2,542 2,574 23:00 Fewer than 200 measured departures — 13 13
Day of week On-time departures 100.0 50.0 0.0
Monday · 76.5% · 17,670 recorded · 17,318 measured · Source: BTS · US Department of Transportation Tuesday · 83.9% · 16,313 recorded · 16,164 measured · Source: BTS · US Department of Transportation Wednesday · 83.1% · 16,113 recorded · 15,991 measured · Source: BTS · US Department of Transportation Thursday · 77.6% · 17,181 recorded · 17,025 measured · Source: BTS · US Department of Transportation Friday · 78.4% · 17,403 recorded · 17,230 measured · Source: BTS · US Department of Transportation Saturday · 79.1% · 14,114 recorded · 13,970 measured · Source: BTS · US Department of Transportation Sunday · 73.8% · 17,874 recorded · 17,476 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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Average departure delay 16.1 8.0 0.0
Monday · 15.4 min · 17,670 recorded · 17,318 measured · Source: BTS · US Department of Transportation Tuesday · 7.5 min · 16,313 recorded · 16,164 measured · Source: BTS · US Department of Transportation Wednesday · 8.5 min · 16,113 recorded · 15,991 measured · Source: BTS · US Department of Transportation Thursday · 12.9 min · 17,181 recorded · 17,025 measured · Source: BTS · US Department of Transportation Friday · 13.7 min · 17,403 recorded · 17,230 measured · Source: BTS · US Department of Transportation Saturday · 11.3 min · 14,114 recorded · 13,970 measured · Source: BTS · US Department of Transportation Sunday · 16.1 min · 17,874 recorded · 17,476 measured · Source: BTS · US Department of Transportation Mon Tue Wed Thu Fri Sat Sun
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Recorded flights 17,874 8,937 0
Monday · 17,670 · 17,670 recorded · 17,318 measured · Source: BTS · US Department of Transportation Tuesday · 16,313 · 16,313 recorded · 16,164 measured · Source: BTS · US Department of Transportation Wednesday · 16,113 · 16,113 recorded · 15,991 measured · Source: BTS · US Department of Transportation Thursday · 17,181 · 17,181 recorded · 17,025 measured · Source: BTS · US Department of Transportation Friday · 17,403 · 17,403 recorded · 17,230 measured · Source: BTS · US Department of Transportation Saturday · 14,114 · 14,114 recorded · 13,970 measured · Source: BTS · US Department of Transportation Sunday · 17,874 · 17,874 recorded · 17,476 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 76.5% 15.4 min 17,318 17,670 Tuesday 83.9% 7.5 min 16,164 16,313 Wednesday 83.1% 8.5 min 15,991 16,113 Thursday 77.6% 12.9 min 17,025 17,181 Friday 78.4% 13.7 min 17,230 17,403 Saturday 79.1% 11.3 min 13,970 14,114 Sunday 73.8% 16.1 min 17,476 17,874
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 · 82.3% · 9,400 recorded · 8,912 measured · Source: BTS · US Department of Transportation Feb · 83.0% · 8,903 recorded · 8,800 measured · Source: BTS · US Department of Transportation Mar · 76.6% · 10,779 recorded · 10,595 measured · Source: BTS · US Department of Transportation Apr · 80.5% · 10,595 recorded · 10,513 measured · Source: BTS · US Department of Transportation May · 76.1% · 11,003 recorded · 10,889 measured · Source: BTS · US Department of Transportation Jun · 70.5% · 11,196 recorded · 11,075 measured · Source: BTS · US Department of Transportation Jul · 70.4% · 5,855 recorded · 5,763 measured · Source: BTS · US Department of Transportation Aug · 78.5% · 5,539 recorded · 5,486 measured · Source: BTS · US Department of Transportation Sep · 85.4% · 10,817 recorded · 10,773 measured · Source: BTS · US Department of Transportation Oct · 82.5% · 11,373 recorded · 11,310 measured · Source: BTS · US Department of Transportation Nov · 82.4% · 10,465 recorded · 10,383 measured · Source: BTS · US Department of Transportation Dec · 74.8% · 10,743 recorded · 10,675 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 20.5 10.3 0.0
Jan · 10.2 min · 9,400 recorded · 8,912 measured · Source: BTS · US Department of Transportation Feb · 8.4 min · 8,903 recorded · 8,800 measured · Source: BTS · US Department of Transportation Mar · 14.5 min · 10,779 recorded · 10,595 measured · Source: BTS · US Department of Transportation Apr · 10.4 min · 10,595 recorded · 10,513 measured · Source: BTS · US Department of Transportation May · 14.7 min · 11,003 recorded · 10,889 measured · Source: BTS · US Department of Transportation Jun · 19.7 min · 11,196 recorded · 11,075 measured · Source: BTS · US Department of Transportation Jul · 20.5 min · 5,855 recorded · 5,763 measured · Source: BTS · US Department of Transportation Aug · 13.3 min · 5,539 recorded · 5,486 measured · Source: BTS · US Department of Transportation Sep · 5.9 min · 10,817 recorded · 10,773 measured · Source: BTS · US Department of Transportation Oct · 8.2 min · 11,373 recorded · 11,310 measured · Source: BTS · US Department of Transportation Nov · 9.4 min · 10,465 recorded · 10,383 measured · Source: BTS · US Department of Transportation Dec · 15.5 min · 10,743 recorded · 10,675 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 11,373 5,687 0
Jan · 9,400 · 9,400 recorded · 8,912 measured · Source: BTS · US Department of Transportation Feb · 8,903 · 8,903 recorded · 8,800 measured · Source: BTS · US Department of Transportation Mar · 10,779 · 10,779 recorded · 10,595 measured · Source: BTS · US Department of Transportation Apr · 10,595 · 10,595 recorded · 10,513 measured · Source: BTS · US Department of Transportation May · 11,003 · 11,003 recorded · 10,889 measured · Source: BTS · US Department of Transportation Jun · 11,196 · 11,196 recorded · 11,075 measured · Source: BTS · US Department of Transportation Jul · 5,855 · 5,855 recorded · 5,763 measured · Source: BTS · US Department of Transportation Aug · 5,539 · 5,539 recorded · 5,486 measured · Source: BTS · US Department of Transportation Sep · 10,817 · 10,817 recorded · 10,773 measured · Source: BTS · US Department of Transportation Oct · 11,373 · 11,373 recorded · 11,310 measured · Source: BTS · US Department of Transportation Nov · 10,465 · 10,465 recorded · 10,383 measured · Source: BTS · US Department of Transportation Dec · 10,743 · 10,743 recorded · 10,675 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 82.3% 10.2 min 8,912 9,400 Feb 83.0% 8.4 min 8,800 8,903 Mar 76.6% 14.5 min 10,595 10,779 Apr 80.5% 10.4 min 10,513 10,595 May 76.1% 14.7 min 10,889 11,003 Jun 70.5% 19.7 min 11,075 11,196 Jul 70.4% 20.5 min 5,763 5,855 Aug 78.5% 13.3 min 5,486 5,539 Sep 85.4% 5.9 min 10,773 10,817 Oct 82.5% 8.2 min 11,310 11,373 Nov 82.4% 9.4 min 10,383 10,465 Dec 74.8% 15.5 min 10,675 10,743
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 77.8% 90,749 Delayed >15 min 20.9% 24,425 Cancelled 1.3% 1,494 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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