Delta Air LinesDL100% on time
Flights DL2455 varies daily · DL1492 varies Mo Tu We Th Fr Su · DL2666 varies daily
live
Direct flights from Salt Lake City (SLC) to St Louis (STL): 7 nonstop departures observed each week across 1 airline. 100% of the last 16 operated flights arrived within 15 minutes of schedule. The median arrival is 21 minutes early. No cancellations were recorded across the 16 tracked flights. The nonstop covers 1,856 km, an estimated 2 hours 53 minutes in the air. Measured by Pro Flight Search from live flight boards at Salt Lake City and St Louis. Updated 14 September 2026 at 04:48 UTC.
SLC
Salt Lake City
busy · +15
STL
St Louis
busy · +26
1,856 km · ~2h 53m est.
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time
of the last 16 operated SLC → STL flights arrived within 15 minutes
Median arrival delay is −21 min. 0 of 16 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−21 minacross the last 16 operated legs
Flight time~2h 53mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 16
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
Current conditions put the pressure at STL: 38% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Salt Lake City to St Louis route actually runs
Pro Flight Search records official board updates for nonstop SLC to STL 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 — Salt Lake City (SLC) to St Louis (STL) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SLC-STL
SLC to STL questions
Is SLC–STL running on time right now?
Mostly on schedule. The arrival side at STL is the weaker end, route health score 73/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SLC to STL?
Great-circle distance is 1,856 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 161–189 min gate-to-gate on this route.
How often does SLC–STL fly?
Delta Air Lines runs the route with about 20 flights a week (daily). 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 SLC and arrival-side delay at STL, 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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