Route reliability record
MIA→IND
Miami to Indianapolis
- Flights
- 931
- Period
- July 2025 to June 2026
- Distance
- 1,020 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, 5 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 931 MIA to IND flights, with a median arrival 4 minutes early.
Best time to fly MIA to IND: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 91.2% of the time and Wednesday flights 78.8%, against 73.0% for the route overall.
The national on-time rate over the same period is 77.6%, so this route runs 5 points behind the country as a whole. Across a thousand flights that is about 46 extra late arrivals.
Key figures
On time
73.0%
Arrivals under 15 minutes late, of 917 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
1.07%
National rate is 1.81%
Best carrier
American
74.2% on time across 750 flights
These figures cover 931 flights between July 2025 and June 2026. Beyond the headline rate, 10.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on MIA to IND
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 |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 2 | 100.0% | — | 0.00% | A+ |
| Republic Airwaysthin sample | 4 | 100.0% | — | 0.00% | A+ |
| Envoy Airthin sample | 56 | 87.5% | 84 min | 0.00% | A+ |
| Frontier Airlinesthin sample | 4 | 75.0% | 17 min | 0.00% | B+ |
| American Airlines | 750 | 74.2% | 70 min | 1.20% | C |
| Southwest Airlinesthin sample | 115 | 56.1% | 54 min | 0.87% | D+ |
Best ways to make this trip
The most reliable ways to fly Miami to Indianapolis
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 3 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. MIA → INDMiami to Indianapolis | American Airlines | 73.3% | 74.2% | 1.20% | 8am–11am, Wed | — |
| 2. FLL → INDFort Lauderdale to Indianapolis | Spirit Airlines | 68.2% | 70.7% | 3.49% | 8am–11am, Sat | — |
| 3. FLL → INDFort Lauderdale to Indianapolis | Southwest Airlines | 64.0% | 64.6% | 0.95% | 8am–11am, 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 25 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am120 flights87.4%
- 8am–11am80 flights91.2%
- 11am–2pm34 flights76.5%
- 2pm–5pm329 flights66.0%
- 5pm–8pm36 flights66.7%
- 8pm–5am332 flights70.4%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 91.2% of the time, against 66.0% for the afternoon window. That is 25 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 332 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 30 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.
August is the worst month at 55.7% on time, 30 points below October, the best at 85.5%. 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 123 flights.
Across the week, Wednesday is the strongest day at 78.8% on time and Sunday the weakest at 66.2%. 13 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 17,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 44%Late-arriving aircraft
- 33%Carrier
- 18%National Airspace System
- 5%Extreme weather
- 0%Security
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 17,000 reported delay minutes here, that single category outweighs weather by 8 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 16,627 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.2% on time here.
Cancellations sit at 1.07% against a national 1.81%, which is ordinary. Diversions add another 0.43%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.6% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 1,020 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 78.9% on time across 928 flights, 6 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 6 points of difference.
One caution: this is a thin sample. 931 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.
Work out the risk of missing a connection in IND after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 931 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 73.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 917 completed flights over 12 months sit behind that.
Common questions
MIA to IND questions
How often is MIA to IND 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 27.0% of the 931 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
How reliable is MIA to IND compared with the rest of the country?
73.0% of flights arrive on time here against a national 77.6%, a difference of 5 points against it. That is worth a C on this site's grading scale.
What time of day has the fewest delays on MIA to IND?
The 8am–11am departure window is the strongest at 91.2% on time. The 2pm–5pm window is the weakest at 66.0%, 25 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 August delays on MIA to IND?
August is the weakest month at 55.7% on time, compared with 85.5% in October. Across the year that is 30 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
- IND to MIA — the return legseparate record
- Miami International (MIA) delay statistics
- Indianapolis International (IND) delay statistics
- American Airlines on MIA to IND74.2%
- Southwest Airlines on MIA to IND56.1%
- MIA to ATL, a related route73.7%
- ORD to IND, a related route74.2%
- MIA to LGA, a related route68.0%
- Delta Air Lines on-time record100.0%
- Republic Airways on-time record100.0%
- Envoy Air on-time record87.5%
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Direction matters. MIA to IND and IND 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.