Route reliability record
PIT→MIA
Pittsburgh to Miami
- Flights
- 736
- Period
- September 2025 to August 2026
- Distance
- 1,013 mi
- Carriers
- 4
This route lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 736 PIT to MIA flights, with a median arrival 10 minutes early.
Best time to fly PIT to MIA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 89.2% of the time and Tuesday flights 84.6%, against 78.9% 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
78.9%
Arrivals under 15 minutes late, of 726 completed flights
Avg delay
91 min
Across delayed arrivals only, not all flights
Cancelled
1.22%
National rate is 1.89%
Best carrier
American
79.4% on time across 639 flights
These figures cover 736 flights between September 2025 and August 2026. The median arrival is 10 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.
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Carrier by carrier
Which airline is most reliable on PIT to MIA
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 |
|---|---|---|---|---|---|
| American Airlines | 639 | 79.4% | 98 min | 1.10% | B |
| Envoy Airthin sample | 38 | 78.4% | 38 min | 2.63% | B |
| Southwest Airlinesthin sample | 51 | 76.0% | 51 min | 1.96% | B |
| Republic Airwaysthin sample | 8 | 62.5% | 62 min | 0.00% | D+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Best ways to make this trip
The most reliable ways to fly Pittsburgh 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 3 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. PIT → MIAPittsburgh to Miami | American Airlines | 78.5% | 79.4% | 1.10% | 5am–8am, Tue (route) | — |
| 2. PIT → FLLPittsburgh to Fort Lauderdale | Southwest Airlines | 77.3% | 78.1% | 1.02% | 8am–11am, Wed | — |
| 3. PIT → FLLPittsburgh to Fort Lauderdale | Spirit Airlines | 72.6% | 77.0% | 5.65% | 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 27 points, against half a point between the best and worst carrier.
- 5am–8am365 flights89.2%
- 8am–11am34 flights75.8%
- 11am–2pm72 flights81.2%
- 2pm–5pm36 flights80.6%
- 5pm–8pm229 flights61.9%
- 8pm–5am—
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 61.9% on time, against 89.2% 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 365 flights scheduled in it.
Explore
Filter PIT 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 PIT to MIA, the best departure window is 5am–8am at 89.2% on time and the worst is 5pm–8pm at 61.9%, a wide gap of 27.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am89.2%
- 8–11am75.8%
- 11am–2pm81.2%
- 2–5pm80.6%
- 5–8pm61.9%
- 8pm–5am—
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 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.
August is the worst month at 65.6% on time, 28 points below September, the best at 93.3%. 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. March was the busiest month here, with 95 flights.
Across the week, Tuesday is the strongest day at 84.6% on time and Sunday the weakest at 71.4%, a spread of 13 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 45% of the 14,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 33%Carrier
- 19%National Airspace System
- 3%Extreme weather
- 0%Security
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 14,000 reported delay minutes here, that single category outweighs weather by 17 to one. The split is drawn from 13,839 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 89.2% on time here.
Cancellations sit at 1.22% against a national 1.89%, which is ordinary. Diversions add another 0.14%.
Connections and stage length
What a delay here actually costs
7.4% 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 an hour and a half, which a normal layover absorbs.
The 1,013 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 73.0% on time across 735 flights, 6 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 6 points of difference.
One caution: this is a thin sample. 736 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 MIA after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 736 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 78.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 726 completed flights over 12 months sit behind that.
Common questions
PIT to MIA questions
How often is PIT to MIA delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.1% of the 736 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is PIT to MIA compared with the rest of the country?
78.9% of flights arrive on time here against a national 77.3%, a difference of 2 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 MIA?
The 5am–8am departure window is the strongest at 89.2% on time. The 5pm–8pm window is the weakest at 61.9%, 27 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 PIT to MIA?
August is the weakest month at 65.6% on time, compared with 93.3% 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
- MIA to PIT — the return legseparate record
- Pittsburgh International (PIT) delay statistics
- Miami International (MIA) delay statistics
- PIT to ORD, a related route77.1%
- ATL to MIA, a related route71.2%
- PIT to LGA, a related route79.9%
- American Airlines on-time record79.4%
- Envoy Air on-time record78.4%
- Southwest Airlines on-time record76.0%
- 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. PIT to MIA and MIA 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.