Carrier route record
WNFLL→PIT
Southwest Airlines · Fort Lauderdale to Pittsburgh
- Flights
- 393
- Period
- September 2025 to August 2026
- Share of route
- 36%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Southwest Airlines.
Southwest on FLL to PIT draws a D. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 393 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.3%, so Southwest on FLL to PIT runs 12 points behind the country as a whole. Across a thousand flights that is about 124 extra late arrivals.
Key figures
On time
64.9%
Arrivals under 15 minutes late, of 388 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.02%
National rate is 1.89%
Whole route
64.6%
Every carrier on FLL to PIT, 1,107 flights
These figures cover 393 flights between September 2025 and August 2026. Beyond the headline rate, 11.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Southwest against every carrier on FLL to PIT
Southwest flew 393 of the 1,107 flights on FLL to PIT, about 36% of it. Its 64.9% on time is about level with the route as a whole at 64.6%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Spirit at 69.4% to JetBlue at 57.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 |
|---|---|---|---|---|---|
| Spirit Airlines | 410 | 69.4% | 70 min | 4.88% | C− |
| Southwest Airlines (this page) | 393 | 64.9% | 61 min | 1.02% | D |
| JetBlue Airwaysthin sample | 304 | 57.7% | 81 min | 1.32% | 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.
Departure window
When Southwest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 52 points, against half a point between the best and worst carrier.
- 5am–8am50 flights96.0%
- 8am–11am23 flights—
- 11am–2pm86 flights80.2%
- 2pm–5pm81 flights63.3%
- 5pm–8pm70 flights44.3%
- 8pm–5am83 flights44.4%
Scale runs 35% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 44.3% on time, against 96.0% 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 11am–2pm window is the busiest, with 86 flights scheduled in it.
Across the year
Southwest on FLL to PIT through the year
September is the best month on the calendar at 90.0% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. July was the busiest month here, with 38 flights.
Across the week, Wednesday is the strongest day at 87.2% on time and Friday the weakest at 51.9%, a spread of 35 points.
Arrival by arrival
How late Southwest on FLL to PIT runs when it is late
The 136 late arrivals split 38 under half an hour, 55 between 30 and 60 minutes, and 43 an hour or more.
- 15+ min early47 flights12.1%
- Within 15 min205 flights52.8%
- 15–29 min late38 flights9.8%
- 30–59 min late55 flights14.2%
- 1–2 hours late27 flights7.0%
- 2+ hours late16 flights4.1%
Scale runs 0% to 100%.
Share of 388 completed flights by arrival against schedule.
20 of 143 late departures made up the time and arrived on time, 14% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for Southwest on FLL to PIT
The latest arrival of the period was on 6 August 2026, 6 hours 9 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 August 2026 | 6 hours 9 minutes | Carrier |
| 19 July 2026 | 3 hours 47 minutes | Late-arriving aircraft |
| 23 June 2026 | 3 hours 14 minutes | Carrier |
| 18 June 2026 | 3 hours 10 minutes | Late-arriving aircraft |
| 20 August 2026 | 3 hours 9 minutes | Late-arriving aircraft |
Delay causes
Why Southwest runs late on this route
Late-arriving aircraft accounts for 60% of the 8,291 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Late-arriving aircraft
- 31%Carrier
- 8%National Airspace System
- 1%Extreme weather
- 0%Security
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,291 reported delay minutes here, that single category outweighs weather by 60 to one. The split is drawn from 8,291 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 96.0% on time here.
Cancellations sit at 1.02% against a national 1.89%, which is ordinary. Diversions add another 0.25%.
Connections and stage length
What a delay here costs
11.1% 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 994 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 78.1% on time across 392 flights, 13 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 13 points of difference.
One caution: this is a thin sample. 393 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.
What to do with this
Booking Southwest on FLL to PIT
Put together: treat all of this as provisional. 393 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 64.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 388 completed flights over 12 months sit behind that.
Related
Where to go next
- FLL to PIT, every carrier
- Southwest on PIT to FLL, the return leg
- Spirit Airlines on FLL to PIT69.4%
- JetBlue Airways on FLL to PIT57.7%
- Southwest Airlines network-wide record
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Pittsburgh International (PIT) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.