Route profile
AUS→MIA
Flight reliability, delays and best times to fly from Austin to Miami, 1,103 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 42% of comparable major US routes (4,598 compared)
Calculated from 5,982 flights. How this is calculated
AUS → MIA arrives on time 77.7% of the time; the return trip, MIA → AUS, arrives on time 72.7% of the time, a 5.0-point gap between the two directions of the same city pair.
AUS → MIA spends 26.0 minutes on the ground on a 1,103-mile trip: 15.6 minutes from pushback to wheels-up at AUS and 10.4 minutes from touchdown to gate at MIA.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
The airline matters unusually much on this route, a wider carrier-to-carrier gap than 94% of 2,692 comparable routes.
Delta Air Lines arrived on time 89.6% of the time, against 69.4% for Envoy Air, flying the exact same route.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 2,692 in the comparison.
Why AUS → MIA flights are cancelled
July 2023 – July 2026
AUS → MIA cancelled 73 of 5,982 scheduled flights — about 1 in every 82. The reason filed most often was extreme weather, 80.8% of the cancellations coded on this route — about 1 in every 101 scheduled flights.
Share of cancellations
Of 73 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
59 cancellations, 80.8% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
10 cancellations, 13.7% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
4 cancellations, 5.5% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
73 coded cancellations were recorded on AUS → MIA; the section appears from 50.
When it goes wrong
July 2023 – July 2026
45 min late
against a median of 6 min early
Percentiles over 5,982 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at MIA after arriving from AUS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 38% | Likely to miss |
| 45 min | 22% | High risk |
| 60 min | 14% | Some risk |
| 90 min | 7.5% | Some risk |
| 120 min | 5.0% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.22% of the time and diverts 0.27% of the time, which a late arrival never shows up in.
Chance of missing is the share of 5,893 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 45 minutes late (90th-percentile gate arrival delay), over 5,982 operations.
Any other layover length: connection checker.
Best time to fly
AUS → MIA flights departing 5–9 AM arrived on time 87.5% of the time, against 60.9% for 6–9 PM departures, a gap of 26.6 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 92.0% on time from 1,125 flights
- 6 AM: too few flights to score
- 7 AM: 82.2% on time from 976 flights
- 8 AM: 89.1% on time from 215 flights
- 9 AM: 88.8% on time from 144 flights
- 10 AM: 78.4% on time from 342 flights
- 11 AM: 78.9% on time from 692 flights
- 12 PM: 75.3% on time from 443 flights
- 1 PM: 70.9% on time from 318 flights
- 2 PM: 58.4% on time from 210 flights
- 3 PM: 63.8% on time from 247 flights
- 4 PM: 64.5% on time from 248 flights
- 5 PM: 69.6% on time from 561 flights
- 6 PM: 60.4% on time from 401 flights
- 7 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why AUS → MIA runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AUS → MIA. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on AUS → MIA, at 40.3%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 87.5% of the time and 6–9 PM departures 60.9%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 4,288 | 79.4% | 1.49% | -7 min | 7.7% |
| Southwest Airlines | 1,093 | 70.7% | 0.46% | 0 min | 7.2% |
| Envoy Air | 289 | 69.4% | 0.00% | -2 min | 9.4% |
| Delta Air Lines | 252 | 89.6% | 1.19% | -12 min | 3.6% |
American Airlines flew 72.4% of the 5,922 flights listed. American Airlines cancelled 1.49% of its flights here against 0.00% for Envoy Air.
Delta Air Lines arrived on time 20.2 percentage points more often than Envoy Air on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| AA406 American Airlines | 5:20 AM | 628 | 90.2% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 8.6 percentage points.
By month
- Jan: 77.0%
- Feb: 85.6%
- Mar: 73.4%
- Apr: 80.3%
- May: 74.3%
- Jun: 75.9%
- Jul: 73.8%
- Aug: 69.8%
- Sep: 85.8%
- Oct: 82.2%
- Nov: 80.9%
- Dec: 78.0%
August is historically the weakest month and September the strongest, a spread of 16.0 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 80.4% from 155 flights
- August 2023: 72.8% from 155 flights
- September 2023: 84.9% from 126 flights
- October 2023: 79.2% from 121 flights
- November 2023: 82.3% from 147 flights
- December 2023: 71.8% from 150 flights
- January 2024: 66.5% from 159 flights
- February 2024: 85.6% from 147 flights
- March 2024: 64.2% from 182 flights
- April 2024: 74.3% from 152 flights
- May 2024: 60.8% from 155 flights
- June 2024: 73.4% from 150 flights
- July 2024: 74.3% from 154 flights
- August 2024: 71.5% from 142 flights
- September 2024: 89.9% from 139 flights
- October 2024: 85.9% from 152 flights
- November 2024: 82.3% from 148 flights
- December 2024: 80.1% from 151 flights
- January 2025: 83.6% from 154 flights
- February 2025: 85.5% from 140 flights
- March 2025: 84.1% from 155 flights
- April 2025: 80.4% from 149 flights
- May 2025: 77.8% from 159 flights
- June 2025: 75.2% from 170 flights
- July 2025: 69.4% from 178 flights
- August 2025: 65.2% from 157 flights
- September 2025: 82.0% from 124 flights
- October 2025: 80.9% from 152 flights
- November 2025: 78.4% from 165 flights
- December 2025: 81.3% from 187 flights
- January 2026: 81.1% from 175 flights
- February 2026: 85.6% from 182 flights
- March 2026: 73.4% from 217 flights
- April 2026: 84.6% from 210 flights
- May 2026: 81.3% from 214 flights
- June 2026: 78.3% from 200 flights
- July 2026: 72.3% from 209 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 78.7% against 80.2% in the 12 months before — declining by 1.5 percentage points.
Data and methodology
Calculated by FlyerIntel from 5,982 AUS → MIA flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed