Carrier route record
OOSLC→MSO
SkyWest Airlines · Salt Lake City to Missoula
- 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 SLC to MSO 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 45 minutes. That rests on 592 flights, with a median arrival 10 minutes early.
Set against the rest of the country, SkyWest's SLC to MSO record is 14 points better than the US average of 77.3%. That gap is worth roughly 144 fewer late arrivals for every thousand flights.
Key figures
On time
91.7%
Arrivals under 15 minutes late, of 581 completed flights
Avg delay
44 min
Across delayed arrivals only, not all flights
Cancelled
1.35%
National rate is 1.89%
Whole route
88.7%
Every carrier on SLC to MSO, 1,059 flights
These figures cover 592 flights between September 2025 and August 2026. The median arrival is 10 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 SLC to MSO
SkyWest flew 592 of the 1,059 flights on SLC to MSO, most of the route. Its 91.7% on time is 3 points better than the route as a whole, which runs 88.7%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 91.7% to Delta at 84.9%.
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 | 91.7% | 44 min | 1.35% | A |
| Delta Air Lines | 467 | 84.9% | 85 min | 0.43% | B+ |
Flight by flight
SkyWest flight numbers on SLC to MSO
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–11am139 flights94.6%
- 11am–2pm113 flights93.8%
- 2pm–5pm340 flights89.9%
- 5pm–8pm—
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 94.6% on time for the 8am–11am window against 89.9% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 2pm–5pm window is the busiest, with 340 flights scheduled in it.
Across the year
SkyWest on SLC to MSO through the year
August is the worst month at 87.1% on time, 11 points below June, the best at 98.3%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. August was the busiest month here, with 62 flights.
Across the week, Tuesday is the strongest day at 95.3% on time and Friday the weakest at 86.7%, a spread of 9 points.
Arrival by arrival
How late SkyWest on SLC to MSO runs when it is late
SkyWest on SLC to MSO often beats the schedule: 204 of 581 completed flights, 35%, arrived 15 minutes or more early. Most of the lateness is short. 27 of the 48 late arrivals were under half an hour behind, and 9 reached an hour or more.
- 15+ min early204 flights35.1%
- Within 15 min329 flights56.6%
- 15–29 min late27 flights4.6%
- 30–59 min late12 flights2.1%
- 1–2 hours late6 flights1.0%
- 2+ hours late3 flights0.5%
Scale runs 0% to 100%.
Share of 581 completed flights by arrival against schedule.
10 of 51 late departures made up the time and arrived on time, 20% of them. Only 7 left on time and still arrived late.
The worst days
Worst days for SkyWest on SLC to MSO
The latest arrival of the period was on 18 February 2026, 3 hours 42 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 February 2026 | 3 hours 42 minutes | Extreme weather |
| 12 July 2026 | 2 hours 29 minutes | Extreme weather |
| 18 April 2026 | 2 hours 3 minutes | Carrier |
| 17 August 2026 | 1 hour 59 minutes | Carrier |
| 15 August 2026 | 1 hour 44 minutes | Extreme weather |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 64% of the 2,111 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Carrier
- 34%Extreme weather
- 2%National Airspace System
Extreme weather accounts for 34% 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 5.6 times the usual weather exposure. The split is drawn from 2,111 reported delay minutes.
The largest share of delay minutes, 64%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,357 of the 2,111 delay minutes reported here.
Cancellations sit at 1.35% against a national 1.89%, which is ordinary. Diversions add another 0.51%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 1.5% 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 8am–11am window matters as much as it does.
The return leg runs 91.8% 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 SLC to MSO
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 91.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 581 completed flights over 12 months sit behind that.
Related
Where to go next
- SLC to MSO, every carrier
- SkyWest on MSO to SLC, the return leg
- Delta Air Lines on SLC to MSO84.9%
- 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.