Alpine Air Express5A
Flights 5A1574 07:21 Sa
live
Direct flights from Sioux Falls (FSD) to Watertown (ATY): 1 nonstop departure observed each week across 1 airline. The median arrival is 6 minutes late. No cancellations were recorded across the 1 tracked flight. The nonstop covers 152 km, an estimated 42 minutes in the air. Measured by Pro Flight Search from live flight boards at Sioux Falls and Watertown. Updated 19 September 2026 at 20:18 UTC.
FSD
Sioux Falls
busy · +26
ATY
Watertown
tracking
152 km · ~0h 42m est.
Under pressure · 1 airline · 1x weekly · nonstop
66 / 100
route health from live FSD and ATY delay boards
Median arrival delay is +6 min. 0 of 1 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+6 minacross the last 1 operated legs
Flight time~0h 42mestimated 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 boardsnext sweep in 120s
How the Sioux Falls to Watertown route actually runs
Pro Flight Search records official board updates for nonstop FSD to ATY 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 — Sioux Falls (FSD) to Watertown (ATY) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/FSD-ATY
FSD to ATY questions
Is FSD–ATY running on time right now?
Some delays possible. The departure side at FSD is the weaker end, route health score 66/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from FSD to ATY?
Great-circle distance is 152 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 41–43 min gate-to-gate on this route.
How often does FSD–ATY fly?
Alpine Air Express runs the route with about 1 flight a week (sat). 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 FSD and arrival-side delay at ATY, 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.
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