Delta Air LinesDL100% on time
Flights DL4320 varies daily
live
Direct flights from West Yellowstone (WYS) to Salt Lake City (SLC): 7 nonstop departures observed each week across 1 airline. 100% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 27 minutes early. No cancellations were recorded across the 8 tracked flights. The nonstop covers 439 km, an estimated 1 hour 4 minutes in the air. Measured by Pro Flight Search from live flight boards at West Yellowstone and Salt Lake City. Updated 13 September 2026 at 21:48 UTC.
WYS
West Yellowstone
tracking
SLC
Salt Lake City
smooth · +0
439 km · ~1h 04m est.
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time
of the last 8 operated WYS → SLC flights arrived within 15 minutes
Median arrival delay is −27 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−27 minacross the last 8 operated legs
Flight time~1h 04mestimated from route distance
Weekly departures7x1 direct airline on the leg
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 West Yellowstone to Salt Lake City route actually runs
Pro Flight Search records official board updates for nonstop WYS to SLC 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 — West Yellowstone (WYS) to Salt Lake City (SLC) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/WYS-SLC
WYS to SLC questions
Is WYS–SLC running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from WYS to SLC?
Great-circle distance is 439 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 61–68 min gate-to-gate on this route.
How often does WYS–SLC fly?
Delta Air Lines runs the route with about 7 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 WYS and arrival-side delay at SLC, 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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