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Route Reliability

St. Louis → Miami

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

88
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
1 min
Average arrival delay
0.8%
Cancelled
1,123
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.American Airlines88%681 flights
  2. 2.Southwest Airlines80%442 flights

What the data says

Morning-you made the right choice.

STL–MIA flights departing between 3–6 AM arrived on time 92% of the time, versus 72% between 3–6 PM.

Saturdays have been rough.

STL–MIA flights arrived on time 93% of the time on Wednesdays and just 72% on Saturdays. That gap is worth planning around.

American Airlines runs this route best.

American Airlines arrived on time 88% of the time on this route; Southwest Airlines managed 80%.

Ticking up lately.

STL–MIA flights arrived on time 87% of the time over the last three months in the data, compared with 84% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon85%(144 flights)
  • Tue87%(148 flights)
  • Wed93%(148 flights)
  • Thu90%(149 flights)
  • Fri89%(147 flights)
  • Sat72%(200 flights)
  • Sun81%(175 flights)
On-time by departure window
  • 3–6 AM92%(364 flights)
  • 6–9 AM84%(139 flights)
  • 9 AM–12 PM87%(215 flights)
  • 12–3 PM80%(142 flights)
  • 3–6 PM72%(82 flights)
  • 6–9 PM76%(169 flights)
On-time trend by month
88%
May

Jun 84% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%77
July 202581%74
August 202579%72
September 202586%66
October 202585%84
November 202583%105
December 202579%99
January 202682%108
February 202690%110
March 202681%130
April 202694%96
May 202688%90

Same trip, other airports

Keep nerding

Based on 1,123 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.