Route reliability record
MIA→DTW
Miami to Detroit
- Flights
- 1,755
- Period
- September 2025 to August 2026
- Distance
- 1,145 mi
- Carriers
- 6
This route sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 1,755 MIA to DTW flights, of which Delta Air Lines flew 930 at 76.9% on time.
Best time to fly MIA to DTW: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 88.3% of the time and Wednesday flights 79.1%, against 73.5% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
73.5%
Arrivals under 15 minutes late, of 1,727 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
1.48%
National rate is 1.89%
Best carrier
Delta
76.9% on time across 930 flights
These figures cover 1,755 flights between September 2025 and August 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on MIA to DTW
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 76.9% of the time; American Airlines manages 70.4%. Sample sizes sit next to every figure, because a two-point gap across 394 flights means less than a ten-point one.
| 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 | 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+ |
Delta leads American by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
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Best ways to make this trip
The most reliable ways to fly Miami to Detroit
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 2 of the top 4 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. FLL → DTWFort Lauderdale to Detroit | Delta Air Lines | 77.4% | 78.6% | 1.55% | 5am–8am, Wed | DL 2631 06:00 |
| 2. MIA → DTWMiami to Detroit | Delta Air Lines | 76.1% | 76.9% | 1.08% | 8am–11am, Wed | — |
| 3. MIA → DTWMiami to Detroit | American Airlines | 69.7% | 70.4% | 1.02% | 5pm–8pm, Fri | — |
| 4. FLL → DTWFort Lauderdale to Detroit | Spirit Airlines | 56.4% | 58.3% | 3.28% | 5am–8am, Wed | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against 7 points between the best and worst carrier.
- 5am–8am25 flights—
- 8am–11am320 flights88.3%
- 11am–2pm447 flights77.2%
- 2pm–5pm128 flights69.8%
- 5pm–8pm444 flights67.5%
- 8pm–5am391 flights64.9%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 64.9% on time, against 88.3% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 11am–2pm window is the busiest, with 447 flights scheduled in it.
Explore
Filter MIA to DTW by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On MIA to DTW, the best departure window is 8am–11am at 88.3% on time and the worst is 8pm–5am at 64.9%, a wide gap of 23.4 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am88.3%
- 11am–2pm77.2%
- 2–5pm69.8%
- 5–8pm67.5%
- 8pm–5am64.9%
best all US flightsScale 55% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 20 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
October is the best month on the calendar at 84.4% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. March was the busiest month here, with 226 flights.
Across the week, Wednesday is the strongest day at 79.1% on time and Monday the weakest at 69.1%, a spread of 10 points.
Delay causes
Why this route gets delayed
Carrier accounts for 42% of the 36,000 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Carrier
- 35%Late-arriving aircraft
- 17%National Airspace System
- 6%Extreme weather
- 0%Security
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 36,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 36,244 reported delay minutes.
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 15,000 of the 36,000 delay minutes reported here.
Cancellations sit at 1.48% against a national 1.89%, which is ordinary. Diversions add another 0.11%.
Connections and stage length
What a delay here actually costs
8.9% 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 a little over 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 80.7% on time across 1,757 flights, 7 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 7 points of difference.
The sample behind these figures is 1,755 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in DTW after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. October runs 84.4% on time and March 64.4%, a swing of 20 points. If the dates move at all, move them out of March before you think about anything else. 1,727 completed flights over 12 months sit behind that.
Common questions
MIA to DTW questions
How often is MIA to DTW delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 26.5% of the 1,755 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on MIA to DTW?
Delta Air Lines leads at 76.9% on time across 930 flights. American Airlines is at the other end on 70.4%, a gap of 7 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on MIA to DTW?
The 8am–11am departure window is the strongest at 88.3% on time. The 8pm–5am window is the weakest at 64.9%, 23 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are March delays on MIA to DTW?
March is the weakest month at 64.4% on time, compared with 84.4% in October. Across the year that is 20 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- DTW to MIA — the return legseparate record
- Miami International (MIA) delay statistics
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Envoy Air on MIA to DTW82.4%
- Delta Air Lines on MIA to DTW76.9%
- American Airlines on MIA to DTW70.4%
- Spirit Airlines on MIA to DTW63.8%
- MIA to ATL, a related route74.2%
- ORD to DTW, a related route71.1%
- MIA to LGA, a related route67.4%
- Envoy Air on-time record82.4%
- Delta Air Lines on-time record76.9%
- American Airlines on-time record70.4%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. MIA to DTW and DTW to MIA are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.