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Route Reliability

New Orleans → St. Louis

MSY–STL · 604 miles · Louis Armstrong New Orleans International Airport to St. Louis Lambert International Airport

88
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
0.4%
Cancelled
732
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 82% of the time across 732 flights. No comparison to make.

What the data says

Morning-you made the right choice.

MSY–STL flights departing between 3–6 AM arrived on time 95% of the time, versus 62% between 6–9 PM.

Sunday scaries are real for this one.

MSY–STL flights arrived on time 89% of the time on Saturdays and just 72% on Sundays. That gap is worth planning around.

Recent months have been rougher.

MSY–STL flights arrived on time 75% of the time over the last three months in the data, compared with 89% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon80%(112 flights)
  • Tue88%(100 flights)
  • Wed89%(99 flights)
  • Thu85%(113 flights)
  • Fri80%(113 flights)
  • Sat89%(64 flights)
  • Sun72%(127 flights)
On-time by departure window
  • 3–6 AM95%(40 flights)
  • 6–9 AM95%(298 flights)
  • 9 AM–12 PM94%(32 flights)
  • 12–3 PM80%(54 flights)
  • 3–6 PM90%(68 flights)
  • 6–9 PM62%(236 flights)
On-time trend by month
72%
May

Jun 75% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%57
July 202577%57
August 202581%47
September 202592%47
October 202585%82
November 202585%58
December 202590%60
January 202695%63
February 202683%70
March 202675%67
April 202680%60
May 202672%60

Keep nerding

Based on 732 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.