Route profile
MIA→AUS
Flight reliability, delays and best times to fly from Miami to Austin, 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 22% of comparable major US routes (4,598 compared)
Calculated from 5,980 flights. How this is calculated
MIA → AUS arrives on time 72.7% of the time; the return trip, AUS → MIA, arrives on time 77.7% of the time, a 5.0-point gap between the two directions of the same city pair.
MIA → AUS spends 28.8 minutes on the ground on a 1,103-mile trip: 20.5 minutes from pushback to wheels-up at MIA and 8.3 minutes from touchdown to gate at AUS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where MIA to AUS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
MIA to AUS struggles most at 5 PM: 54.0% of its flights scheduled then arrive on time, 13.7 points behind the 67.7% on routes of similar length at the same hour. Against all other routes the gap is 15.8 points.
MIA to AUS is at its best against routes of similar length for flights scheduled at 9 PM: 69.2% arrive on time, 4.4 points ahead of the 64.8% those routes manage at that hour.
Saturday is the day MIA to AUS slips furthest against routes of similar length, 69.2% on time where they average 77.0%, 7.8 points lower. Against all other routes the gap is 9.9 points.
In July, MIA to AUS runs 5.4 points below routes of similar length, 62.8% on time to 68.2%. Against all other routes the gap is 6.9 points.
Southwest Airlines’ flights on MIA to AUS arrive on time 72.0% of the time, 3.3 points below the 75.3% it manages on its routes of similar length. Against all other routes the gap is 5.4 points.
MIA to AUS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 5 PM departures | 54.0% | routes of similar length | 67.7% | −13.7 pts | 137 here, 167,153 there |
| Hour: 9 PM departures | 69.2% | routes of similar length | 64.8% | +4.4 pts | 886 here, 74,086 there |
| Weekday: Saturday | 69.2% | routes of similar length | 77.0% | −7.8 pts | 821 here, 368,593 there |
| Month: July | 62.8% | routes of similar length | 68.2% | −5.4 pts | 688 here, 298,106 there |
| Airline: Southwest Airlines | 72.0% | routes of similar length | 75.3% | −3.3 pts | 1,086 here, 624,165 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,103 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why MIA → AUS flights are cancelled
July 2023 – July 2026
MIA → AUS cancelled 65 of 5,980 scheduled flights — about 1 in every 92. The reason filed most often was extreme weather, 80.0% of the cancellations coded on this route — about 1 in every 115 scheduled flights.
Share of cancellations
Of 65 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.
52 cancellations, 80.0% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
8 cancellations, 12.3% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
5 cancellations, 7.7% 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.
65 coded cancellations were recorded on MIA → AUS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
60 min late
against a median of 3 min early
MIA → AUS has an average that understates its risk: a typical arrival is 3 min early, but the worst tenth are 63 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 5,980 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at AUS after arriving from MIA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 44% | Likely to miss |
| 45 min | 27% | High risk |
| 60 min | 18% | High risk |
| 90 min | 9.9% | Some risk |
| 120 min | 6.2% | 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 1.09% of the time and diverts 0.22% of the time, which a late arrival never shows up in.
Chance of missing is the share of 5,902 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 60 minutes late (90th-percentile gate arrival delay), over 5,980 operations.
Any other layover length: connection checker.
Best time to fly
MIA → AUS flights departing 5–9 AM arrived on time 89.3% of the time, against 66.7% for 3–6 PM departures, a gap of 22.6 percentage points.
By departure window
By departure hour
- 12 AM to 6 AM: too few flights to score
- 7 AM: 91.2% on time from 160 flights
- 8 AM: 89.0% on time from 917 flights
- 9 AM: 87.1% on time from 217 flights
- 10 AM to 11 AM: too few flights to score
- 12 PM: 70.8% on time from 350 flights
- 1 PM: 71.5% on time from 508 flights
- 2 PM: 65.6% on time from 502 flights
- 3 PM: 68.8% on time from 594 flights
- 4 PM: too few flights to score
- 5 PM: 54.0% on time from 140 flights
- 6 PM: 66.8% on time from 520 flights
- 7 PM: 68.8% on time from 770 flights
- 8 PM: too few flights to score
- 9 PM: 69.2% on time from 899 flights
- 10 PM: 61.2% on time from 189 flights
- 11 PM: too few flights to score
Why MIA → AUS 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 MIA → AUS. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on MIA → AUS, at 41.9%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 89.3% of the time and 3–6 PM departures 66.7%.
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 | 4,290 | 73.0% | 1.38% | -5 min | 10.5% |
| Southwest Airlines | 1,092 | 72.0% | 0.37% | -1 min | 8.8% |
| Envoy Air | 286 | 73.4% | 0.00% | -2 min | 5.6% |
| Delta Air Lines | 253 | 67.7% | 0.79% | -2 min | 13.5% |
American Airlines flew 72.5% of the 5,921 flights listed. American Airlines cancelled 1.38% of its flights here against 0.00% for Envoy Air.
Envoy Air arrived on time 5.7 percentage points more often than Delta Air Lines 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 |
|---|---|---|---|
| AA2629 American Airlines | 7:00 PM | 649 | 69.3% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 12.9 percentage points.
By month
- Jan: 73.5%
- Feb: 79.7%
- Mar: 70.2%
- Apr: 76.8%
- May: 69.0%
- Jun: 69.2%
- Jul: 62.8%
- Aug: 69.2%
- Sep: 77.6%
- Oct: 80.2%
- Nov: 78.6%
- Dec: 73.0%
July is historically the weakest month and October the strongest, a spread of 17.4 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 67.5% from 155 flights
- August 2023: 75.0% from 154 flights
- September 2023: 75.2% from 125 flights
- October 2023: 84.4% from 122 flights
- November 2023: 73.5% from 147 flights
- December 2023: 70.5% from 149 flights
- January 2024: 66.0% from 158 flights
- February 2024: 78.1% from 147 flights
- March 2024: 62.7% from 182 flights
- April 2024: 75.3% from 153 flights
- May 2024: 64.5% from 155 flights
- June 2024: 62.4% from 150 flights
- July 2024: 60.8% from 155 flights
- August 2024: 63.0% from 142 flights
- September 2024: 77.7% from 139 flights
- October 2024: 83.0% from 151 flights
- November 2024: 84.2% from 147 flights
- December 2024: 75.3% from 150 flights
- January 2025: 85.6% from 155 flights
- February 2025: 81.9% from 140 flights
- March 2025: 68.0% from 155 flights
- April 2025: 85.9% from 150 flights
- May 2025: 75.8% from 159 flights
- June 2025: 74.3% from 170 flights
- July 2025: 66.7% from 178 flights
- August 2025: 69.0% from 157 flights
- September 2025: 79.8% from 125 flights
- October 2025: 74.2% from 152 flights
- November 2025: 78.0% from 166 flights
- December 2025: 73.1% from 186 flights
- January 2026: 69.3% from 175 flights
- February 2026: 79.4% from 182 flights
- March 2026: 77.9% from 217 flights
- April 2026: 71.3% from 210 flights
- May 2026: 67.1% from 213 flights
- June 2026: 69.8% from 200 flights
- July 2026: 57.5% from 209 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 71.8% against 76.6% in the 12 months before — declining by 4.8 percentage points.
Data and methodology
Calculated by FlyerIntel from 5,980 MIA → AUS 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