Route · MIA → STL · 2020–2025 BTS data
Miami to St. Louis
The MIA–STL corridor (Miami, FL → St. Louis, MO) runs behind the national average, served by 16 carriers across roughly 1,068 miles.
Data updated 2026-06-13
- 70.9%
- On-time
- -8.1 pts
- vs US avg
- 70 min
- Delay when late
- 4,894
- Flights
Cancelled
0.8%
Best Month
Oct 2024 91%
Worst Month
Aug 2025 53%
Distance
1,068 mi
Carriers
16
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 98 | 31 | 0 | 0 | YX,WN,AA,MQ |
| Nov 2025 | 105 | 18 | 0 | 0 | MQ,AA,WN,YX |
| Oct 2025 | 84 | 22 | 0 | 0 | AA,WN |
| Sep 2025 | 68 | 22 | 0 | 0 | WN,AA |
| Aug 2025 | 73 | 34 | 0 | 0 | AA,WN,MQ |
| Jul 2025 | 74 | 33 | 0 | 0 | AA,WN,MQ |
| Jun 2025 | 77 | 34 | 1 | 0 | AA,WN,MQ |
| May 2025 | 102 | 35 | 0 | 0 | AA,WN,MQ |
| Apr 2025 | 99 | 23 | 1 | 1 | MQ,WN,AA |
| Mar 2025 | 106 | 31 | 0 | 1 | AA,WN,MQ |
| Feb 2025 | 88 | 13 | 0 | 0 | AA,WN,MQ |
| Jan 2025 | 96 | 12 | 5 | 0 | AA,WN,MQ |
| Dec 2024 | 94 | 31 | 0 | 0 | AA,MQ,WN |
| Nov 2024 | 89 | 10 | 0 | 1 | MQ,WN,AA |
| Oct 2024 | 67 | 6 | 0 | 0 | WN,AA |
| Sep 2024 | 60 | 16 | 0 | 0 | WN,AA |
| Aug 2024 | 64 | 19 | 1 | 0 | AA,WN |
| Jul 2024 | 66 | 17 | 1 | 0 | AA,WN |
| Jun 2024 | 68 | 27 | 1 | 0 | AA,MQ,WN |
| May 2024 | 88 | 35 | 0 | 0 | AA,MQ,WN |
| Apr 2024 | 69 | 23 | 1 | 1 | AA,WN |
| Mar 2024 | 107 | 33 | 5 | 0 | AA,WN |
| Feb 2024 | 95 | 22 | 0 | 0 | AA,WN,YX |
| Jan 2024 | 93 | 34 | 1 | 0 | AA,WN,YX |
Cancellation Rate
0.8%
17 of 2,030 flights
Diversion Rate
0.2%
4 of 2,030 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
MIA - Miami
Full on-time, delay-cause, and seasonal performance for Miami, FL.
Origin airport →STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Destination airport →Compare the two airports
See MIA and STL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to MIA–STL.
Routes with a similar on-time rate
What the Data Says About MIA to STL
On-time performance on the MIA to STL pairing (Miami to St. Louis) trails a chunk of the network: 70.9% of 4,894 tracked flights arrived on schedule, with a 69.7-minute average delay on the ones that ran late. The route spans about 1,068 miles across 16 carriers. Cancellations over the trailing 24 months hit 0.8% (17 of 2,030 flights), with 0.2% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 91% on-time, while Aug 2025 came in at just 53% - a 38-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.