Carrier route record
AAMIA→DTW
American Airlines · Miami to Detroit
- Flights
- 394
- Period
- September 2025 to August 2026
- Share of route
- 22%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with American Airlines.
American on MIA to DTW sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 394 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so American on MIA to DTW runs 7 points behind the country as a whole. Across a thousand flights that is about 69 extra late arrivals.
Key figures
On time
70.4%
Arrivals under 15 minutes late, of 389 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.02%
National rate is 1.89%
Whole route
73.5%
Every carrier on MIA to DTW, 1,755 flights
These figures cover 394 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Carrier by carrier
American against every carrier on MIA to DTW
American flew 394 of the 1,755 flights on MIA to DTW, about 22% of it. Its 70.4% on time is 3 points worse than the route as a whole, which runs 73.5%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from Envoy at 82.4% to Republic at 57.1%. Four of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 108 | 82.4% | 52 min | 0.00% | B+ |
| Delta Air Lines | 930 | 76.9% | 92 min | 1.08% | B |
| American Airlines (this page) | 394 | 70.4% | 64 min | 1.02% | C |
| Frontier Airlinesthin sample | 64 | 67.7% | 88 min | 3.12% | C− |
| Spirit Airlinesthin sample | 245 | 63.8% | 69 min | 4.08% | D− |
| Republic Airwaysthin sample | 14 | 57.1% | 126 min | 0.00% | D+ |
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Departure window
When American runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against half a point between the best and worst carrier.
- 5am–8am4 flights—
- 8am–11am25 flights—
- 11am–2pm—
- 2pm–5pm—
- 5pm–8pm54 flights77.8%
- 8pm–5am311 flights67.1%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 77.8% on time. The full set of windows spans 11 points.
Across the year
American on MIA to DTW through the year
June is the worst month at 56.7% on time, 33 points below September, the best at 90.0%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 49 flights.
Across the week, Friday is the strongest day at 78.2% on time and Monday the weakest at 58.9%, a spread of 19 points.
Arrival by arrival
How late American on MIA to DTW runs when it is late
The 115 late arrivals split 44 under half an hour, 41 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early91 flights23.4%
- Within 15 min183 flights47.0%
- 15–29 min late44 flights11.3%
- 30–59 min late41 flights10.5%
- 1–2 hours late15 flights3.9%
- 2+ hours late15 flights3.9%
Scale runs 0% to 100%.
Share of 389 completed flights by arrival against schedule.
24 of 123 late departures made up the time and arrived on time, 20% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for American on MIA to DTW
The latest arrival of the period was on 2 May 2026, 9 hours 50 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 May 2026 | 9 hours 50 minutes | Carrier |
| 5 March 2026 | 9 hours 24 minutes | Carrier |
| 28 October 2025 | 4 hours 10 minutes | Carrier |
| 7 February 2026 | 3 hours 34 minutes | Carrier |
| 5 January 2026 | 3 hours 27 minutes | Late-arriving aircraft |
Delay causes
Why American runs late on this route
Carrier accounts for 45% of the 7,393 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 38%Late-arriving aircraft
- 12%National Airspace System
- 5%Extreme weather
- 0%Security
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,393 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 7,393 reported delay minutes.
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,355 of the 7,393 delay minutes reported here.
Cancellations sit at 1.02% against a national 1.89%, which is ordinary. Diversions add another 0.25%.
Connections and stage length
What a delay here costs
7.7% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 1,145 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 88.9% on time across 394 flights, 19 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 19 points of difference.
One caution: this is a thin sample. 394 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking American on MIA to DTW
Put together: treat all of this as provisional. 394 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 70.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 389 completed flights over 12 months sit behind that.
Related
Where to go next
- MIA to DTW, every carrier
- American on DTW to MIA, the return leg
- Envoy Air on MIA to DTW82.4%
- Delta Air Lines on MIA to DTW76.9%
- Spirit Airlines on MIA to DTW63.8%
- American Airlines network-wide record
- Miami International (MIA) delay statistics
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.