Route reliability record
PIT→BNA
Pittsburgh to Nashville
- Flights
- 1,096
- Period
- July 2025 to June 2026
- Distance
- 462 mi
- Carriers
- 2
This route lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,096 PIT to BNA flights, with a median arrival 8 minutes early.
Best time to fly PIT to BNA: a 5am–8am departure, ideally on a Saturday. Flights in that window arrived on time 95.0% of the time and Saturday flights 89.9%, against 83.6% for the route overall.
Set against the rest of the country, this route's record is 6 points better than the US average of 77.6%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.
Key figures
On time
83.6%
Arrivals under 15 minutes late, of 1,089 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.81%
Best carrier
Southwest
83.6% on time across 1,012 flights
These figures cover 1,096 flights between July 2025 and June 2026. The median arrival is 8 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.
Carrier by carrier
Which airline is most reliable on PIT to BNA
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 |
|---|---|---|---|---|---|
| Southwest Airlines | 1,012 | 83.6% | 56 min | 0.59% | B+ |
| Allegiant Airthin sample | 84 | 83.3% | 93 min | 0.00% | B+ |
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 24 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–8am364 flights95.0%
- 8am–11am10 flights—
- 11am–2pm259 flights85.3%
- 2pm–5pm61 flights77.0%
- 5pm–8pm242 flights74.7%
- 8pm–5am160 flights70.9%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 95.0% of the time, against 70.9% for the overnight window. That is 24 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 364 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 15 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 77.7% on time, 15 points below January, the best at 92.5%. 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. October was the busiest month here, with 98 flights.
Across the week, Saturday is the strongest day at 89.9% on time and Sunday the weakest at 79.4%. 11 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 52% of the 11,000 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.
- 52%Late-arriving aircraft
- 21%Carrier
- 18%National Airspace System
- 9%Extreme weather
- 1%Security
52% 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 11,000 reported delay minutes here, that single category outweighs weather by 6 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 10,594 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 95.0% on time here.
Cancellations are rare at 0.55%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
Badly late arrivals are rare here: only 4.4% land an hour or more behind schedule, against 8.1% 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.
At 462 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 73.8% on time across 1,101 flights, 10 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 10 points of difference.
The sample behind these figures is 1,096 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. January runs 92.5% on time and July 77.7%, a swing of 15 points. If the dates move at all, move them out of July before you think about anything else. 1,089 completed flights over 12 months sit behind that.
Common questions
PIT to BNA questions
How often is PIT to BNA delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.4% of the 1,096 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
How reliable is PIT to BNA compared with the rest of the country?
83.6% of flights arrive on time here against a national 77.6%, a difference of 6 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on PIT to BNA?
The 5am–8am departure window is the strongest at 95.0% on time. The 8pm–5am window is the weakest at 70.9%, 24 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 PIT to BNA?
July is the weakest month at 77.7% on time, compared with 92.5% in January. Across the year that is 15 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 PIT — the return legseparate record
- Pittsburgh International (PIT) delay statistics
- Nashville International (BNA) delay statistics
- PIT to ORD, a related route78.6%
- ORD to BNA, a related route68.6%
- PIT to LGA, a related route80.9%
- Southwest Airlines on-time record83.6%
- Allegiant Air on-time record83.3%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. PIT to BNA and BNA to PIT 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.