Route reliability record
BNA→MIA
Nashville to Miami
- Flights
- 2,534
- Period
- September 2025 to August 2026
- Distance
- 806 mi
- Carriers
- 5
This route sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 2,534 BNA to MIA flights, of which American Airlines flew 1,330 at 79.0% on time.
Best time to fly BNA to MIA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 87.6% of the time and Tuesday flights 83.8%, against 75.3% 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
75.3%
Arrivals under 15 minutes late, of 2,494 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
1.22%
National rate is 1.89%
Best carrier
American
79.0% on time across 1,330 flights
These figures cover 2,534 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% 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 BNA to MIA
The choice of carrier is not cosmetic here. American Airlines arrives on time 79.0% of the time; Southwest Airlines manages 70.2%. Sample sizes sit next to every figure, because a two-point gap across 761 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 1,330 | 79.0% | 100 min | 1.13% | B |
| Spirit Airlinesthin sample | 47 | 75.6% | 80 min | 4.26% | B− |
| Envoy Airthin sample | 359 | 72.7% | 67 min | 1.39% | C |
| Southwest Airlines | 761 | 70.2% | 49 min | 1.05% | C |
| Republic Airwaysthin sample | 37 | 69.4% | 66 min | 2.70% | C |
American leads Southwest by 9 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 Nashville to Miami
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. BNA → MIANashville to Miami | American Airlines | 78.1% | 79.0% | 1.13% | 5am–8am, Tue | — |
| 2. BNA → FLLNashville to Fort Lauderdale | Southwest Airlines | 74.0% | 74.7% | 1.00% | 5am–8am, Wed | — |
| 3. BNA → FLLNashville to Fort Lauderdale | Spirit Airlines | 70.2% | 74.0% | 5.20% | 5am–8am, Wed | — |
| 4. BNA → MIANashville to Miami | Southwest Airlines | 69.5% | 70.2% | 1.05% | 5am–8am, Tue | — |
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 26 points, against 9 points between the best and worst carrier.
- 5am–8am792 flights87.6%
- 8am–11am342 flights85.5%
- 11am–2pm385 flights72.2%
- 2pm–5pm196 flights70.4%
- 5pm–8pm774 flights61.3%
- 8pm–5am45 flights66.7%
Scale runs 55% to 95%.
The 5pm–8pm window is where this operation falls apart: 61.3% on time, against 87.6% 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 5am–8am window is the busiest, with 792 flights scheduled in it.
Explore
Filter BNA to MIA 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 BNA to MIA, the best departure window is 5am–8am at 87.6% on time and the worst is 5pm–8pm at 61.3%, a wide gap of 26.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am87.6%
- 8–11am85.5%
- 11am–2pm72.2%
- 2–5pm70.4%
- 5–8pm61.3%
- 8pm–5am66.7%
best all US flightsScale 55% to 95%.
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.
July is the worst month at 63.3% on time, 20 points below September, the best at 83.7%. 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 83.8% on time and Sunday the weakest at 66.5%, a spread of 17 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 55% of the 47,000 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Late-arriving aircraft
- 31%Carrier
- 11%National Airspace System
- 2%Extreme weather
- 0%Security
55% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 47,000 reported delay minutes here, that single category outweighs weather by 34 to one. The split is drawn from 46,600 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 87.6% on time here.
Cancellations sit at 1.22% against a national 1.89%, which is ordinary. Diversions add another 0.36%.
Connections and stage length
What a delay here actually costs
9.0% 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 70.0% on time across 2,533 flights, 5 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 5 points of difference.
The sample behind these figures is 2,534 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 MIA 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 83.7% on time and July 63.3%, a swing of 20 points. If the dates move at all, move them out of July before you think about anything else. 2,494 completed flights over 12 months sit behind that.
Common questions
BNA to MIA questions
How often is BNA to MIA 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 24.7% of the 2,534 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 BNA to MIA?
American Airlines leads at 79.0% on time across 1,330 flights. Southwest Airlines is at the other end on 70.2%, a gap of 9 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 BNA to MIA?
The 5am–8am departure window is the strongest at 87.6% on time. The 5pm–8pm window is the weakest at 61.3%, 26 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 BNA to MIA?
July is the weakest month at 63.3% on time, compared with 83.7% in September. 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
- MIA to BNA — the return legseparate record
- Nashville International (BNA) delay statistics
- Miami International (MIA) delay statistics
- American Airlines on BNA to MIA79.0%
- Envoy Air on BNA to MIA72.7%
- Southwest Airlines on BNA to MIA70.2%
- BNA to ORD, a related route70.9%
- ATL to MIA, a related route71.2%
- BNA to DCA, a related route71.3%
- American Airlines on-time record79.0%
- Spirit Airlines on-time record75.6%
- Envoy Air on-time record72.7%
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Direction matters. BNA to MIA and MIA to BNA 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.