Route
STL → MIA
St. Louis Lambert International Airport Miami International Airport
How punctual is this route?
- On-time arrivals
- 81.9%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 68 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,200
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 30%
- Air traffic control & airport 22%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.4% | 68 |
| October 2025 | 83.3% | 84 |
| November 2025 | 81.9% | 105 |
| December 2025 | 78.8% | 99 |
| January 2026 | 81.5% | 110 |
| February 2026 | 88.2% | 110 |
| March 2026 | 80.0% | 136 |
| April 2026 | 93.8% | 96 |
| May 2026 | 86.7% | 90 |
| June 2026 | 73.7% | 99 |
| July 2026 | 74.5% | 100 |
| August 2026 | 76.5% | 103 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| American Airlines | 633 | 89.6% | 0.9% | 103 min |
| Southwest Airlines | 441 | 71.5% | 0.5% | 51 min |
| Envoy Air | 122 | 81.0% | 0.0% | 64 min |
| Republic Airways | 4 | 25.0% | 0.0% | 37 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AA1716
4% late · 209 flights
-
AA2981
7% late · 119 flights
-
MQ3954
15% late · 55 flights
-
MQ3659
21% late · 53 flights
-
AA1622
9% late · 46 flights
-
WN3225
11% late · 46 flights
-
AA1318
9% late · 37 flights
-
AA3175
8% late · 37 flights
-
WN3009
21% late · 33 flights
-
WN4550
29% late · 33 flights
-
AA3054
19% late · 32 flights
-
WN2648
16% late · 31 flights
-
WN3437
21% late · 31 flights
-
AA1715
18% late · 30 flights
-
AA477
15% late · 27 flights
-
WN2901
74% late · 27 flights
-
WN1776
15% late · 26 flights
-
WN489
16% late · 25 flights
-
AA3159
29% late · 24 flights
-
WN1095
29% late · 24 flights
-
AA968
24% late · 21 flights
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