Skip to content
WanderNerd
Check a flight

Route Reliability

Miami → St. Louis

MIA–STL · 1,068 miles · Miami International Airport to St. Louis Lambert International Airport

74
Usually Fine
WanderNerd Reliability Score
72%
Arrive within 15 minutes
13 min
Average arrival delay
0.8%
Cancelled
1,120
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.American Airlines76%678 flights
  2. 2.Southwest Airlines66%442 flights

What the data says

Morning-you made the right choice.

MIA–STL flights departing between 3–6 AM arrived on time 100% of the time, versus 56% between 6–9 PM.

Sunday scaries are real for this one.

MIA–STL flights arrived on time 78% of the time on Wednesdays and just 62% on Sundays. That gap is worth planning around.

American Airlines runs this route best.

American Airlines arrived on time 76% of the time on this route; Southwest Airlines managed 66%.

Flights on this route

The breakdown

On-time by weekday
  • Mon69%(144 flights)
  • Tue75%(149 flights)
  • Wed78%(148 flights)
  • Thu72%(145 flights)
  • Fri73%(147 flights)
  • Sat76%(200 flights)
  • Sun62%(175 flights)
On-time by departure window
  • 3–6 AM100%(20 flights)
  • 6–9 AM94%(148 flights)
  • 9 AM–12 PM93%(40 flights)
  • 12–3 PM87%(126 flights)
  • 3–6 PM68%(323 flights)
  • 6–9 PM56%(198 flights)
  • 9 PM–12 AM64%(253 flights)
On-time trend by month
76%
May

Jun 57% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%76
July 202555%74
August 202553%73
September 202569%68
October 202576%84
November 202583%105
December 202570%98
January 202677%108
February 202675%110
March 202681%128
April 202674%96
May 202676%88

Same trip, other airports

Keep nerding

Based on 1,120 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.