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

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

74.9% of 1,020 official scheduled STL-to-MCI flights arrived on time; 14.7% arrived at least 30 minutes late and 0.3% 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 SIGNALGenerally reliable
74.9%arrived on time
14.7%30+ min late
0.3%cancelled
1,020scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.1%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+8.7 mincompleted flights

Which departure time was most reliable for STL to MCI?

Among qualifying STL-to-MCI departure window results, Early morning had the highest on-time rate: 95.2% of 125 flights. Night was lowest at 53.5% across 200 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning12595.2%1.6%0.0%
Late morning23487.6%6.0%0.0%
Afternoon30074.7%15.0%0.0%
Evening16167.7%19.3%0.0%
Night20053.5%29.0%1.5%

Which weekday was most reliable for STL to MCI?

Among qualifying STL-to-MCI weekday results, Wednesday had the highest on-time rate: 82.1% of 145 flights. Sunday was lowest at 62.1% across 153 flights.

DayFlightsOn time30+ minCancelled
Monday15368.0%20.3%0.0%
Tuesday15181.5%10.6%0.0%
Wednesday14582.1%9.7%0.0%
Thursday15174.2%15.2%0.0%
Friday15180.8%11.9%0.7%
Saturday11676.7%16.4%0.0%
Sunday15362.1%19.0%1.3%

Which airline was most reliable for STL to MCI?

Only Southwest Airlines met the STL-to-MCI airline threshold: 74.9% of 1,020 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,02074.9%14.7%0.3%

Which month was most reliable for STL to MCI?

Among qualifying STL-to-MCI month results, November 2025 had the highest on-time rate: 85.2% of 81 flights. December 2025 was lowest at 58.8% across 85 flights.

MonthFlightsOn time30+ minCancelled
July 20259268.5%20.7%0.0%
August 20259276.1%9.8%1.1%
September 20259084.4%8.9%0.0%
October 20258877.3%11.4%0.0%
November 20258185.2%8.6%0.0%
December 20258558.8%21.2%1.2%
January 20267080.0%14.3%0.0%
February 20267181.7%8.5%0.0%
March 20268779.3%14.9%1.1%
April 20268673.3%23.3%0.0%
May 20268873.9%11.4%0.0%
June 20269063.3%22.2%0.0%

What drove STL to MCI delay minutes?

Late aircraft was the largest recorded STL-to-MCI delay category, accounting for 59.3% of 13,856 BTS-attributed delay minutes during July 2025–June 2026.

Airline24.6%
Late aircraft59.3%
National airspace10.2%
Weather5.9%
Security0.0%
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.