Flight number record
OO 3862
SkyWest Airlines · Great Falls to Salt Lake City
- Route
- GTF → SLC
- Departs
- 05:40
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3862, 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 3862 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 20 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 3.1 hours. That rests on 255 flights, with a median arrival 17 minutes early.
Set against the rest of the country, OO 3862's record is 20 points better than the US average of 77.3%. That gap is worth roughly 199 fewer late arrivals for every thousand flights.
Key figures
On time
97.2%
Arrivals under 15 minutes late, of 254 completed flights
Avg delay
187 min
Across delayed arrivals only, not all flights
Cancelled
0.39%
National rate is 1.89%
1 hour+ late
0.8%
National rate is 8.3%
These figures cover 255 flights between September 2025 and August 2026. The median arrival is 17 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 3862 flies
OO 3862 flies GTF to SLC without a single fixed slot. Its most common scheduled departure was 05:40, used on 117 of 255 flights, with 05:30 (103 flights) next.
- Departs 05:40117 flights45.9%
- Departs 05:30103 flights40.4%
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 05:40 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 3862 runs 8 points better at 97.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 3862 next to GTF to SLC
Every carrier on GTF to SLC combined arrived on time 92.6% of the time across 1,072 flights, so OO 3862 is 5 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 19 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3862thin sample | 255 | 97.2% | 187 min | 0.39% | A+ |
| All SkyWest Airlines on GTF–SLC | 1,072 | 92.6% | 72 min | 0.75% | A+ |
| All carriers on GTF–SLC | 1,072 | 92.6% | 72 min | 0.75% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3862 quarter by quarter
Quarter by quarter OO 3862 held fairly steady: 93.3% in Jan–Mar 2026, 100.0% in Apr–Jun 2026 and 100.0% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Oct–Dec 202512 flights—
- Jan–Mar 202690 flights93.3%
- Apr–Jun 202691 flights100.0%
- Jul–Sep 202662 flights100.0%
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 3862 ranged from 91.7% on Friday to 100.0% on Monday. With about 36 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 3862 runs when it is late
OO 3862 often beats the schedule: 152 of 254 completed flights, 60%, arrived 15 minutes or more early. The 7 late arrivals split 3 under half an hour, 2 between 30 and 60 minutes, and 2 an hour or more.
- 15+ min early152 flights59.8%
- Within 15 min95 flights37.4%
- 15–29 min late3 flights1.2%
- 30–59 min late2 flights0.8%
- 1–2 hours late0 flights0.0%
- 2+ hours late2 flights0.8%
Scale runs 0% to 100%.
Share of 254 completed flights by arrival against schedule.
Only 3 of 254 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for OO 3862
The latest arrival of the period was on 7 March 2026, 11 hours 40 minutes behind schedule; most of its delay minutes were filed as extreme weather. Four of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 March 2026 | 11 hours 40 minutes | Extreme weather |
| 25 December 2025 | 7 hours 45 minutes | Extreme weather |
| 12 March 2026 | 48 minutes | Extreme weather |
| 14 March 2026 | 41 minutes | Carrier |
| 13 March 2026 | 21 minutes | Carrier |
Delay causes
Why OO 3862 runs late
Extreme weather accounts for 93% of the 1,306 delay minutes carriers reported here, and the remaining four split what is left.
- 93%Extreme weather
- 6%Carrier
- 1%National Airspace System
Extreme weather accounts for 93% 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 15.4 times the usual weather exposure. The split is drawn from 1,306 delay minutes reported on OO 3862.
Cancellations are rare at 0.39%, 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 0.8% 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.
The same number turns up on one other city pair in the data, including ROC to DTW (104), but none flew often enough under OO 3862 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to GTF to SLC only.
One caution: this is a thin sample. 255 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 OO 3862
For a booking, OO 3862 has one of the better records a US domestic flight can show: 97.2% on time and 0.39% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- GTF to SLC, every carrier and departure
- SLC to GTF, the return direction
- SkyWest Airlines 3859 on the same route91.9%
- SkyWest Airlines 3800 on the same route89.4%
- 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.