Routes › Sanford (SFB) › SFB to SDF
Route · 12 months to July 2026
Sanford to Louisville: on-time record
Orlando Sanford International to Louisville Muhammad Ali International
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
51.2% of scheduled SFB to SDF flights arrived on time in the 12 months to July 2026. The figure covers 127 flights between Sanford and Louisville by carriers that report to BTS, a distance of 698 miles.
That is 24.8 points below the national on-time share of 76.0% for the same period and 18.3 points below the 69.5% recorded for all departures from SFB. Flights that did arrive were 53.1 min late on average, and 1.6% of scheduled flights were cancelled (national: 1.8%).
Allegiant Air is the only reporting carrier on the route, with 127 flights in the period.
The on-time share is about level with the previous 12 months (51.5%); cancellations moved from 1.5% to 1.6%.
Of the delay minutes that carriers assigned to a BTS cause category on this route, air carrier 33%, late-arriving aircraft 29% and extreme weather 27%.
- On time 51.2%
- Arrived 15+ minutes late 47.2%
- Cancelled 1.6%
- Diverted 0.0%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| G4 Allegiant Air | 127 | 100% | 51.2% | 53.1 min | 1.6% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | SFB to SDF | All departures from SFB | All arrivals at SDF | All reported flights |
|---|---|---|---|---|
| Arrived on time | 51.2% | 69.5% | 75.8% | 76.0% |
| Arrived 15+ minutes late | 47.2% | 29.6% | 21.7% | 21.9% |
| Cancelled | 1.6% | 0.7% | 2.3% | 1.8% |
| Diverted | 0.0% | 0.3% | 0.1% | 0.3% |
| Average arrival delay | 53.1 min | 20.0 min | 7.5 min | 8.1 min |
| Delay minutes per 100 flights | 5,709 | 2,634 | 1,585 | 1,684 |
| Scheduled flights | 127 | 10,115 | 23,143 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, SDF to SFB, recorded 47.2% on time across 127 flights in the same period.
Month by month
Year on year: on time 51.2% against 51.5% (−0.3 pts), cancelled 1.6% against 1.5%, flights 127 against 134.
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| Jan | 25 | 64.0% | 8.0% | 11.9 min | 3 |
| Feb | 25 | 56.0% | 0.0% | 20.2 min | 3 |
| Mar | 30 | 50.0% | 3.3% | 34.9 min | 3 |
| Apr | 28 | 46.4% | 0.0% | 25.7 min | 3 |
| May | 34 | 70.6% | 0.0% | 13.6 min | 3 |
| Jun | 47 | 55.3% | 4.3% | 30.4 min | 3 |
| Jul | 47 | 72.3% | 0.0% | 44.7 min | 3 |
| Aug | 32 | 65.6% | 0.0% | 20.1 min | 3 |
| Sep | 26 | 76.9% | 0.0% | 11.3 min | 3 |
| Oct | 40 | 57.5% | 2.5% | 60.2 min | 3 |
| Nov | 29 | 62.1% | 0.0% | 20.0 min | 3 |
| Dec | 28 | 46.4% | 0.0% | 23.4 min | 3 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from Sanford (SFB)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SFB–ABE | Sanford to Allentown/Bethlehem/Easton | 642 | 75.5% | 17.7 min | 0.3% |
| SFB–TYS | Sanford to Knoxville | 639 | 63.7% | 21.3 min | 0.6% |
| SFB–AVL | Sanford to Asheville | 515 | 69.3% | 22.0 min | 0.6% |
| SFB–GRR | Sanford to Grand Rapids | 400 | 71.5% | 16.8 min | 0.8% |
| SFB–CVG | Sanford to Cincinnati | 351 | 64.7% | 24.1 min | 0.3% |
| SFB–FNT | Sanford to Flint | 322 | 73.9% | 15.6 min | 0.3% |
| SFB–BGR | Sanford to Bangor | 288 | 79.9% | 4.3 min | 2.1% |
| SFB–MDT | Sanford to Harrisburg | 278 | 77.7% | 13.6 min | 0.4% |
All 69 routes and the airport record for SFB · airport record for SDF
Questions and answers
How often are flights from Sanford to Louisville on time?
51.2% of the 127 flights scheduled from SFB to SDF in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from SFB to SDF?
Allegiant Air is the only reporting carrier with at least 60 flights on the route in the period, so there is no comparison to make.
What causes delays between Sanford and Louisville?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 33%, late-arriving aircraft 29%, extreme weather 27%, national aviation system 11%, security 0%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from SFB?
Too few departure hours carry enough flights on this route to compare them.
Is it getting better?
The on-time share for the 12 months to July 2026 was 51.2%, about level with the previous 12 months (51.5%). The monthly chart on this page shows each of the last 36 months.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.