Delta Air LinesDL63% on time
Flights DL4320 varies daily
live
Direct flights from Salt Lake City (SLC) to West Yellowstone (WYS): 7 nonstop departures observed each week across 1 airline. 63% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 12 minutes late. 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 Salt Lake City and West Yellowstone. Updated 13 September 2026 at 11:34 UTC.
SLC
Salt Lake City
busy · +15
WYS
West Yellowstone
tracking
439 km · ~1h 04m est.
Runs mixed · 1 airline · 7x weekly · nonstop
63% on time
of the last 8 operated SLC → WYS flights arrived within 15 minutes
Median arrival delay is +12 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+12 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 Salt Lake City to West Yellowstone route actually runs
Pro Flight Search records official board updates for nonstop SLC to WYS 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 West Yellowstone (WYS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SLC-WYS
SLC to WYS questions
Is SLC–WYS running on time right now?
Mostly on schedule. The departure side at SLC is the weaker end, route health score 80/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SLC to WYS?
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 SLC–WYS 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 SLC and arrival-side delay at WYS, 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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