Route reliability record
MIA→BNA
Miami to Nashville
- Flights
- 2,533
- Period
- September 2025 to August 2026
- Distance
- 806 mi
- Carriers
- 5
This route 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 2,533 MIA to BNA flights, of which American Airlines flew 1,330 at 66.6% on time.
Best time to fly MIA to BNA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 92.3% of the time and Tuesday flights 78.7%, against 70.0% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 7 points behind the country as a whole. Across a thousand flights that is about 73 extra late arrivals.
Key figures
On time
70.0%
Arrivals under 15 minutes late, of 2,498 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.22%
National rate is 1.89%
Best carrier
American
66.6% on time across 1,330 flights
These figures cover 2,533 flights between September 2025 and August 2026. Beyond the headline rate, 9.6% 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 BNA
The two carriers here are closely matched: half a point separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 357 | 89.5% | 48 min | 1.12% | A |
| Spirit Airlinesthin sample | 48 | 76.1% | 120 min | 4.17% | B− |
| Republic Airwaysthin sample | 37 | 72.2% | 89 min | 2.70% | C |
| American Airlines | 1,330 | 66.6% | 70 min | 1.20% | C |
| Southwest Airlines | 761 | 66.3% | 53 min | 1.05% | C |
No carrier stands out. American tops the table at 66.6%, half a point clear of the bottom, which is inside the range this kind of sample moves year to year.
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Best ways to make this trip
The most reliable ways to fly Miami to Nashville
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 → BNAFort Lauderdale to Nashville | Southwest Airlines | 68.3% | 68.8% | 0.77% | 5am–8am, Wed | — |
| 2. FLL → BNAFort Lauderdale to Nashville | Spirit Airlines | 65.9% | 69.1% | 4.62% | 5am–8am, Wed | — |
| 3. MIA → BNAMiami to Nashville | American Airlines | 65.8% | 66.6% | 1.20% | 8am–11am, Tue | — |
| 4. MIA → BNAMiami to Nashville | Southwest Airlines | 65.6% | 66.3% | 1.05% | 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 41 points, against half a point between the best and worst carrier.
- 5am–8am250 flights92.3%
- 8am–11am420 flights88.5%
- 11am–2pm352 flights72.2%
- 2pm–5pm591 flights62.2%
- 5pm–8pm209 flights51.7%
- 8pm–5am711 flights62.1%
Scale runs 45% to 100%.
The 5pm–8pm window is where this operation falls apart: 51.7% on time, against 92.3% for the 5am–8am 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 8pm–5am window is the busiest, with 711 flights scheduled in it.
Explore
Filter MIA to BNA 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 BNA, the best departure window is 5am–8am at 92.3% on time and the worst is 5pm–8pm at 51.7%, a wide gap of 40.6 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am92.3%
- 8–11am88.5%
- 11am–2pm72.2%
- 2–5pm62.2%
- 5–8pm51.7%
- 8pm–5am62.1%
best all US flightsScale 45% to 95%.
Across the year
When delays peak on this route
This route's year swings by 28 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.
July is the worst month at 52.6% on time, 28 points below September, the best at 80.9%. 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 241 flights.
Across the week, Tuesday is the strongest day at 78.7% on time and Sunday the weakest at 59.5%, a spread of 19 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 46% of the 48,000 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Late-arriving aircraft
- 29%Carrier
- 17%National Airspace System
- 7%Extreme weather
- 0%Security
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 48,000 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 48,272 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.3% on time here.
Cancellations sit at 1.22% against a national 1.89%, which is ordinary. Diversions add another 0.16%.
Connections and stage length
What a delay here actually costs
9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 806 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 75.3% on time across 2,534 flights, 5 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 5 points of difference.
The sample behind these figures is 2,533 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 BNA 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. September runs 80.9% on time and July 52.6%, a swing of 28 points. If the dates move at all, move them out of July before you think about anything else. 2,498 completed flights over 12 months sit behind that.
Common questions
MIA to BNA questions
How often is MIA to BNA delayed?
Roughly one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 30.0% of the 2,533 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on MIA to BNA?
American Airlines leads at 66.6% on time across 1,330 flights. Southwest Airlines is at the other end on 66.3%, a gap of half a point. 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 BNA?
The 5am–8am departure window is the strongest at 92.3% on time. The 5pm–8pm window is the weakest at 51.7%, 41 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 July delays on MIA to BNA?
July is the weakest month at 52.6% on time, compared with 80.9% in September. Across the year that is 28 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
- BNA to MIA — the return legseparate record
- Miami International (MIA) delay statistics
- Nashville International (BNA) delay statistics
- Envoy Air on MIA to BNA89.5%
- American Airlines on MIA to BNA66.6%
- Southwest Airlines on MIA to BNA66.3%
- MIA to ATL, a related route74.2%
- ORD to BNA, a related route69.2%
- MIA to LGA, a related route67.4%
- Envoy Air on-time record89.5%
- Spirit Airlines on-time record76.1%
- Republic Airways on-time record72.2%
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Direction matters. MIA to BNA and BNA 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.