Carrier route record

AADTW→MIA

American Airlines · Detroit to Miami

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 DTW to MIA earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 394 flights, with a median arrival 11 minutes early.

Set against the rest of the country, American's DTW to MIA record is 12 points better than the US average of 77.3%. That gap is worth roughly 116 fewer late arrivals for every thousand flights.

On time

88.9%

Arrivals under 15 minutes late, of 388 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

1.02%

National rate is 1.89%

Whole route

80.7%

Every carrier on DTW to MIA, 1,757 flights

These figures cover 394 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Carrier by carrier

American against every carrier on DTW to MIA

American flew 394 of the 1,757 flights on DTW to MIA, about 22% of it. Its 88.9% on time is 8 points better than the route as a whole, which runs 80.7%. Ranked by on-time rate it is first of six carriers on the route, where the range runs from American at 88.9% to Frontier at 66.7%. 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.

On-time performance by carrier on DTW to MIA
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines (this page)	394	88.9%	84 min	1.02%	A
Envoy Airthin sample	108	81.5%	72 min	0.00%	B+
Delta Air Lines	929	79.1%	55 min	1.08%	B
Spirit Airlinesthin sample	248	77.7%	61 min	4.03%	B−
Republic Airwaysthin sample	14	71.4%	39 min	0.00%	C+
Frontier Airlinesthin sample	64	66.7%	96 min	1.56%	C

Flight by flight

American flight numbers on DTW to MIA

AA 102006:0089.4% · 365 flights

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Departure window

When American runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 394 flights.

There are not enough flights in each departure window to split American's DTW to MIA record by time of day without the percentages moving on noise. The headline rate of 88.9% is the reliable figure here.

Across the year

American on DTW to MIA through the year

Darker means more delays. Figures are on-time percentages.May best, January worst

January is the weak month at 76.1% on time, against 100.0% in May. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. January was the busiest month here, with 49 flights.

Across the week, Tuesday is the strongest day at 96.3% on time and Sunday the weakest at 80.4%, a spread of 16 points.

Arrival by arrival

How late American on DTW to MIA runs when it is late

American on DTW to MIA often beats the schedule: 163 of 388 completed flights, 42%, arrived 15 minutes or more early. Most of the lateness is short. 22 of the 43 late arrivals were under half an hour behind, and 12 reached an hour or more.

15+ min early163 flights42.0%
Within 15 min182 flights46.9%
15–29 min late22 flights5.7%
30–59 min late9 flights2.3%
1–2 hours late6 flights1.5%
2+ hours late6 flights1.5%

Scale runs 0% to 100%.

Share of 388 completed flights by arrival against schedule.

A late pushback is often recovered here: of 29 departures that left 15 minutes late or more, 9 still arrived on time. In the other direction, 23 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at MIA.

The worst days

Worst days for American on DTW to MIA

The latest arrival of the period was on 14 March 2026, 15 hours 39 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in January 2026.

The latest arrivals of American on DTW to MIA in the period
Date	Arrived late by	Largest filed cause
14 March 2026	15 hours 39 minutes	Late-arriving aircraft
26 January 2026	8 hours 30 minutes	Carrier
6 June 2026	4 hours 25 minutes	Carrier
14 January 2026	3 hours 34 minutes	Late-arriving aircraft
28 January 2026	2 hours 43 minutes	Carrier

Delay causes

Why American runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,613 reported delay minutes.

Carrier
39%
Late-arriving aircraft
37%
National Airspace System
23%
Extreme weather
0%

37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,613 reported delay minutes here, that single category outweighs weather by 37 to one. The split is drawn from 3,613 reported delay minutes.

The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,419 of the 3,613 delay minutes reported here.

Cancellations sit at 1.02% against a national 1.89%, which is ordinary. Diversions add another 0.51%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

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 70.4% on time across 394 flights, 19 points below 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 DTW to MIA

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 88.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 388 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures