Alpine Air Express5A
Flights 5A1110 06:45 We
live
Direct flights from Louisville (SDF) to San Antonio (SAT): 1 nonstop departure observed each week across 1 airline. No cancellations were recorded across the 1 tracked flight. The nonstop covers 1,516 km, an estimated 2 hours 27 minutes in the air. Measured by Pro Flight Search from live flight boards at Louisville and San Antonio. Updated 4 November 2026 at 15:03 UTC.
SDF
Louisville
smooth · +6
SAT
San Antonio
smooth · +0
1,516 km · ~2h 27m est.
Running clean · 1 airline · 1x weekly · nonstop
95 / 100
route health from live SDF and SAT delay boards
0 of 1 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Flight time~2h 27mestimated from route distance
Weekly departures1x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alpine Air Express
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Conditions are tightest at SDF: a 35% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +4 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the Louisville to San Antonio route actually runs
Pro Flight Search records official board updates for nonstop SDF to SAT flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search: Louisville (SDF) to San Antonio (SAT) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SDF-SAT
SDF to SAT questions
Is SDF–SAT running on time right now?
Smooth skies ahead. The departure side at SDF is the weaker end, route health score 95/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SDF to SAT?
Great-circle distance is 1,516 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 137–160 min gate-to-gate on this route.
How often does SDF–SAT fly?
Alpine Air Express runs the route with about 1 flight a week (wed). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at SDF and arrival-side delay at SAT, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
.