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

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

83.5% of 732 official scheduled STL-to-MSY flights arrived on time; 10.2% arrived at least 30 minutes late and 0.1% 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
83.5%arrived on time
10.2%30+ min late
0.1%cancelled
732scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late1.8%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+1.8 mincompleted flights

Which departure time was most reliable for STL to MSY?

Among qualifying STL-to-MSY departure window results, Late morning had the highest on-time rate: 93.1% of 87 flights. Night was lowest at 65.1% across 126 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning25591.0%5.1%0.0%
Late morning8793.1%3.4%0.0%
Afternoon8175.3%14.8%0.0%
Evening18384.7%10.4%0.0%
Night12665.1%22.2%0.8%

Which weekday was most reliable for STL to MSY?

Among qualifying STL-to-MSY weekday results, Tuesday had the highest on-time rate: 93.1% of 102 flights. Sunday was lowest at 75.4% across 126 flights.

DayFlightsOn time30+ minCancelled
Monday11485.1%8.8%0.0%
Tuesday10293.1%2.9%0.0%
Wednesday9987.9%7.1%0.0%
Thursday11478.9%13.2%0.0%
Friday11281.2%10.7%0.0%
Saturday6586.2%4.6%0.0%
Sunday12675.4%19.8%0.8%

Which airline was most reliable for STL to MSY?

Only Southwest Airlines met the STL-to-MSY airline threshold: 83.5% of 732 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines73283.5%10.2%0.1%

Which month was most reliable for STL to MSY?

Among qualifying STL-to-MSY month results, September 2025 had the highest on-time rate: 93.6% of 47 flights. June 2026 was lowest at 67.9% across 56 flights.

MonthFlightsOn time30+ minCancelled
July 20255775.4%19.3%0.0%
August 20254891.7%4.2%0.0%
September 20254793.6%4.3%0.0%
October 20258279.3%11.0%0.0%
November 20255782.5%14.0%0.0%
December 20256185.2%6.6%0.0%
January 20266388.9%7.9%0.0%
February 20267191.5%2.8%0.0%
March 20266877.9%13.2%1.5%
April 20266188.5%9.8%0.0%
May 20266182.0%6.6%0.0%
June 20265667.9%23.2%0.0%

What drove STL to MSY delay minutes?

Late aircraft was the largest recorded STL-to-MSY delay category, accounting for 65.7% of 6,830 BTS-attributed delay minutes during July 2025–June 2026.

Airline20.4%
Late aircraft65.7%
National airspace9.4%
Weather2.7%
Security1.8%
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.