Carrier route record
OOMSO→SLC
SkyWest Airlines · Missoula to Salt Lake City
- Flights
- 592
- Period
- September 2025 to August 2026
- Share of route
- 56%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on MSO to SLC earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 592 flights, with a median arrival 11 minutes early.
Set against the rest of the country, SkyWest's MSO to SLC record is 15 points better than the US average of 77.3%. That gap is worth roughly 145 fewer late arrivals for every thousand flights.
Key figures
On time
91.8%
Arrivals under 15 minutes late, of 583 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.35%
National rate is 1.89%
Whole route
91.2%
Every carrier on MSO to SLC, 1,059 flights
These figures cover 592 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
SkyWest against every carrier on MSO to SLC
SkyWest flew 592 of the 1,059 flights on MSO to SLC, most of the route. Its 91.8% on time is about level with the route as a whole at 91.2%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 91.8% to Delta at 90.5%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page) | 592 | 91.8% | 56 min | 1.35% | A |
| Delta Air Lines | 467 | 90.5% | 96 min | 0.43% | A+ |
Flight by flight
SkyWest flight numbers on MSO to SLC
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 592 flights.
- 5am–8am—
- 8am–11am—
- 11am–2pm250 flights92.6%
- 2pm–5pm2 flights—
- 5pm–8pm340 flights91.1%
- 8pm–5am—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
The 11am–2pm window is the strongest at 92.6% on time. The full set of windows spans 2 points.
Across the year
SkyWest on MSO to SLC through the year
September is the best month on the calendar at 100.0% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. August was the busiest month here, with 62 flights.
Across the week, Thursday is the strongest day at 96.4% on time and Saturday the weakest at 85.3%, a spread of 11 points.
Arrival by arrival
How late SkyWest on MSO to SLC runs when it is late
SkyWest on MSO to SLC often beats the schedule: 236 of 583 completed flights, 40%, arrived 15 minutes or more early. The 48 late arrivals split 19 under half an hour, 15 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early236 flights40.5%
- Within 15 min299 flights51.3%
- 15–29 min late19 flights3.3%
- 30–59 min late15 flights2.6%
- 1–2 hours late10 flights1.7%
- 2+ hours late4 flights0.7%
Scale runs 0% to 100%.
Share of 583 completed flights by arrival against schedule.
12 of 49 late departures made up the time and arrived on time, 24% of them. Only 11 left on time and still arrived late.
The worst days
Worst days for SkyWest on MSO to SLC
The latest arrival of the period was on 5 December 2025, 4 hours 3 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 December 2025 | 4 hours 3 minutes | Extreme weather |
| 18 February 2026 | 3 hours 49 minutes | Extreme weather |
| 14 January 2026 | 3 hours 31 minutes | Extreme weather |
| 12 July 2026 | 2 hours 26 minutes | Extreme weather |
| 1 April 2026 | 1 hour 50 minutes | Extreme weather |
Delay causes
Why SkyWest runs late on this route
Extreme weather accounts for 49% of the 2,667 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Extreme weather
- 40%Carrier
- 11%National Airspace System
Extreme weather accounts for 49% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 8.2 times the usual weather exposure. The split is drawn from 2,667 reported delay minutes.
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,072 of the 2,667 delay minutes reported here.
Cancellations sit at 1.35% against a national 1.89%, which is ordinary. Diversions add another 0.17%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 2.4% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 436 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg runs 91.7% on time across 592 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 592 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking SkyWest on MSO to SLC
Put together: treat all of this as provisional. 592 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 91.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 583 completed flights over 12 months sit behind that.
Related
Where to go next
- MSO to SLC, every carrier
- SkyWest on SLC to MSO, the return leg
- Delta Air Lines on MSO to SLC90.5%
- SkyWest Airlines network-wide record
- Salt Lake City International (SLC) delay statistics
- Worst months to fly in the US, ranked by the data
- Late aircraft, weather, or the airline: what actually causes US flight delays
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.