Flight number record
OO 3808
SkyWest Airlines · Missoula to Salt Lake City
- Route
- MSO → SLC
- Departs
- 18:20
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3808, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 3808 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 50 minutes. That rests on 340 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 3808's record is 14 points better than the US average of 77.3%. That gap is worth roughly 138 fewer late arrivals for every thousand flights.
Key figures
On time
91.1%
Arrivals under 15 minutes late, of 338 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
0.29%
National rate is 1.89%
1 hour+ late
2.1%
National rate is 8.3%
These figures cover 340 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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Schedule
When OO 3808 flies
OO 3808 flies MSO to SLC without a single fixed slot. Its most common scheduled departure was 18:20, used on 57 of 340 flights, with 18:27 (56 flights) and 18:18 (55 flights) next.
- Departs 18:2057 flights16.8%
- Departs 18:2756 flights16.5%
- Departs 18:1855 flights16.2%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 18:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3808 runs 23 points better at 91.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 3808 next to MSO to SLC
Every carrier on MSO to SLC combined arrived on time 91.2% of the time across 1,059 flights, so OO 3808 is about level with it. SkyWest flew 592 flights on the same city pair under all its flight numbers, including this one, and those ran 91.8% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3808thin sample | 340 | 91.1% | 49 min | 0.29% | A+ |
| All SkyWest Airlines on MSO–SLC | 592 | 91.8% | 56 min | 1.35% | A |
| All carriers on MSO–SLC | 1,059 | 91.2% | 75 min | 0.94% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3808 quarter by quarter
Quarter by quarter OO 3808 held fairly steady: 95.3% in Oct–Dec 2025, 87.0% in Jan–Mar 2026, 89.0% in Apr–Jun 2026 and 90.0% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202525 flights—
- Oct–Dec 202586 flights95.3%
- Jan–Mar 202677 flights87.0%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202661 flights90.0%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 3808 ranged from 85.0% on Saturday to 96.2% on Monday. With about 49 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 3808 runs when it is late
OO 3808 often beats the schedule: 132 of 338 completed flights, 39%, arrived 15 minutes or more early. The 30 late arrivals split 11 under half an hour, 12 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early132 flights39.1%
- Within 15 min176 flights52.1%
- 15–29 min late11 flights3.3%
- 30–59 min late12 flights3.6%
- 1–2 hours late5 flights1.5%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 338 completed flights by arrival against schedule.
8 of 30 late departures made up the time and arrived on time, 27% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for OO 3808
The latest arrival of the period was on 18 February 2026, 3 hours 49 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 49 minutes | Extreme weather |
| 12 July 2026 | 2 hours 26 minutes | Extreme weather |
| 1 April 2026 | 1 hour 50 minutes | Extreme weather |
| 29 July 2026 | 1 hour 39 minutes | National Airspace System |
| 18 April 2026 | 1 hour 36 minutes | Carrier |
Delay causes
Why OO 3808 runs late
Carrier accounts for 46% of the 1,474 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 41%Extreme weather
- 13%National Airspace System
Extreme weather accounts for 41% 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 quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 6.9 times the usual weather exposure. The split is drawn from 1,474 delay minutes reported on OO 3808.
Cancellations are rare at 0.29%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.1% 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.
OO 3808 is not only a MSO to SLC flight. It also flew SLC to MSO (340 flights, 89.9% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 340 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SLC to MSOthin sample | 340 | 89.9% | 42 min | 0.29% | A+ |
What to do with this
Booking OO 3808
For a booking, OO 3808 has one of the better records a US domestic flight can show: 91.1% on time and 0.29% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- MSO to SLC, every carrier and departure
- SLC to MSO, the return direction
- Delta Air Lines 2795 on the same route92.4%
- SkyWest Airlines 4112 on the same route92.7%
- Salt Lake City International (SLC) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.