Route · MIA → STL · 2020–2025 BTS data
Miami to St. Louis
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MIA to STL (Miami to St. Louis) ranks #2527 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 70.9%
- On-time
- -8.1 pts
- vs US avg
- 70 min
- Delay when late
- 4,894
- Flights
- #2527 of 4927
- Corpus placement
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 |
MIA–STL seasonal on-time pattern
Best: November (83.2%) · weakest: June (57.0%)
Strongest calendar month
November
83.2% on-time · ~88 flights/mo
Busiest calendar month
February
~94 flights/mo avg
Weakest calendar month
June
57.0% on-time · ~67 flights/mo
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.
MIA on-time profileSTL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
STL on-time profileCompare the two airports
See MIA and STL side by side on delays, cancellations, and reliability.
Compare MIA vs STLOrigin-hub reliability standing
Softer reliability from MIA
Among 63 routes leaving MIA, only 25 (including this one) clear below 75% on-time, while 1 stay ≥85% and 37 sit mid-band. Travelers comparing MIA options should weigh this 70.9% print against those peers · fleet on-time rank #4811 of 4927.
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.
On the multi-year calendar, MIA–STL peaks in November at 83.2% on-time while February carries the heaviest traffic (~94 flights per month) ; the softest month is June at 57.0%, a 26.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does MIA to STL rank among US routes by traffic? ▼
How often are flights delayed from MIA to STL? ▼
What is the cancellation rate for MIA to STL? ▼
How far is the flight from MIA to STL? ▼
When is the best time to fly from MIA to STL? ▼
Airports on this route
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.
Using MIA–STL data
MIA–STL sits 8.1 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare MIA and STL airport profiles: delay causes and top routes differ even on the same corridor. MIA airport
- If your dates flex, November (83.2% on-time) beats June (57.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 70.9% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.