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

New Orleans, LA (MSY) to St. Louis, MO (STL) flight delay odds

81.3% of 731 official scheduled MSY-to-STL flights arrived on time; 10.7% 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
81.3%arrived on time
10.7%30+ min late
0.4%cancelled
731scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.7%all scheduled flights
120+ minutes late1.4%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+2.1 mincompleted flights

Which departure time was most reliable for MSY to STL?

Among qualifying MSY-to-STL departure window results, Early morning had the highest on-time rate: 93.9% of 344 flights. Evening was lowest at 67.5% across 292 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning34493.9%3.5%0.3%
Afternoon6771.6%11.9%0.0%
Evening29267.5%19.9%0.7%

Which weekday was most reliable for MSY to STL?

Among qualifying MSY-to-STL weekday results, Tuesday had the highest on-time rate: 89.2% of 102 flights. Sunday was lowest at 69.0% across 126 flights.

DayFlightsOn time30+ minCancelled
Monday11377.9%11.5%0.0%
Tuesday10289.2%5.9%0.0%
Wednesday9988.9%2.0%0.0%
Thursday11383.2%10.6%0.0%
Friday11378.8%15.9%0.0%
Saturday6587.7%6.2%1.5%
Sunday12669.0%18.3%1.6%

Which airline was most reliable for MSY to STL?

Only Southwest Airlines met the MSY-to-STL airline threshold: 81.3% of 731 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines73181.3%10.7%0.4%

Which month was most reliable for MSY to STL?

Among qualifying MSY-to-STL month results, January 2026 had the highest on-time rate: 95.2% of 63 flights. May 2026 was lowest at 70.5% across 61 flights.

MonthFlightsOn time30+ minCancelled
July 20255777.2%17.5%0.0%
August 20254879.2%12.5%2.1%
September 20254789.4%4.3%0.0%
October 20258282.9%9.8%0.0%
November 20255882.8%12.1%0.0%
December 20256090.0%8.3%0.0%
January 20266395.2%3.2%0.0%
February 20267081.4%11.4%0.0%
March 20266873.5%13.2%1.5%
April 20266178.7%11.5%1.6%
May 20266170.5%11.5%0.0%
June 20265675.0%12.5%0.0%

What drove MSY to STL delay minutes?

Late aircraft was the largest recorded MSY-to-STL delay category, accounting for 70.2% of 6,681 BTS-attributed delay minutes during July 2025–June 2026.

Airline21.4%
Late aircraft70.2%
National airspace5.3%
Weather2.1%
Security1.0%
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.