BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
MCI→STL

Kansas City, MO (MCI) to St. Louis, MO (STL) flight delay odds

85.8% of 1,020 official scheduled MCI-to-STL flights arrived on time; 8.8% arrived at least 30 minutes late and 0.4% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
85.8%arrived on time
8.8%30+ min late
0.4%cancelled
1,020scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.1%all scheduled flights
120+ minutes late0.8%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-1.8 mincompleted flights

Which departure time was most reliable for MCI to STL?

Among qualifying MCI-to-STL departure window results, Early morning had the highest on-time rate: 94.2% of 359 flights. Evening was lowest at 68.5% across 200 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning35994.2%3.9%0.6%
Late morning11591.3%6.1%0.9%
Afternoon34685.3%7.2%0.3%
Evening20068.5%22.0%0.0%

Which weekday was most reliable for MCI to STL?

Among qualifying MCI-to-STL weekday results, Wednesday had the highest on-time rate: 91.7% of 145 flights. Thursday was lowest at 80.1% across 151 flights.

DayFlightsOn time30+ minCancelled
Monday15381.0%11.8%1.3%
Tuesday15190.1%5.3%0.7%
Wednesday14591.7%7.6%0.0%
Thursday15180.1%7.3%0.0%
Friday15191.4%6.0%0.0%
Saturday11686.2%10.3%0.0%
Sunday15380.4%13.7%0.7%

Which airline was most reliable for MCI to STL?

Only Southwest Airlines met the MCI-to-STL airline threshold: 85.8% of 1,020 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,02085.8%8.8%0.4%

Which month was most reliable for MCI to STL?

Among qualifying MCI-to-STL month results, February 2026 had the highest on-time rate: 94.4% of 71 flights. June 2026 was lowest at 77.8% across 90 flights.

MonthFlightsOn time30+ minCancelled
July 20259282.6%9.8%0.0%
August 20259285.9%9.8%0.0%
September 20259091.1%5.6%0.0%
October 20258886.4%6.8%0.0%
November 20258187.7%9.9%0.0%
December 20258588.2%4.7%1.2%
January 20267090.0%7.1%1.4%
February 20267194.4%1.4%0.0%
March 20268783.9%12.6%1.1%
April 20268684.9%10.5%0.0%
May 20268879.5%13.6%1.1%
June 20269077.8%12.2%0.0%

What drove MCI to STL delay minutes?

Late aircraft was the largest recorded MCI-to-STL delay category, accounting for 63.7% of 6,537 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.1%
Late aircraft63.7%
National airspace11.0%
Weather2.0%
Security1.2%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.