Flight number record
OO 3800
SkyWest Airlines · Great Falls to Salt Lake City
- Route
- GTF → SLC
- Departs
- 18:10
- Flights
- 312
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3800, 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 3800 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 312 flights, with a median arrival 12 minutes early.
Set against the rest of the country, OO 3800's record is 12 points better than the US average of 77.3%. That gap is worth roughly 121 fewer late arrivals for every thousand flights.
Key figures
On time
89.4%
Arrivals under 15 minutes late, of 310 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.64%
National rate is 1.89%
1 hour+ late
3.5%
National rate is 8.3%
These figures cover 312 flights between September 2025 and August 2026. The median arrival is 12 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 3800 flies
OO 3800 flies GTF to SLC without a single fixed slot. Its most common scheduled departure was 18:10, used on 61 of 312 flights, with 18:25 (56 flights) and 18:20 (43 flights) next.
- Departs 18:1061 flights19.6%
- Departs 18:2556 flights17.9%
- Departs 18:2043 flights13.8%
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 18:10 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3800 runs 21 points better at 89.4%. 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 3800 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 3800 is 3 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3800thin sample | 312 | 89.4% | 58 min | 0.64% | 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 3800 quarter by quarter
OO 3800 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 82.7%, a swing of 11 points on roughly 62 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202586 flights91.8%
- Jan–Mar 202676 flights82.7%
- Apr–Jun 202660 flights88.3%
- Jul–Sep 202660 flights93.3%
Scale runs 75% to 100%.
By weekday, OO 3800 did best on Tuesday at 100.0% on time and worst on Sunday at 82.2%. Each day rests on about 45 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3800 runs when it is late
OO 3800 often beats the schedule: 133 of 310 completed flights, 43%, arrived 15 minutes or more early. The 33 late arrivals split 11 under half an hour, 11 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early133 flights42.9%
- Within 15 min144 flights46.5%
- 15–29 min late11 flights3.5%
- 30–59 min late11 flights3.5%
- 1–2 hours late9 flights2.9%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 310 completed flights by arrival against schedule.
8 of 36 late departures made up the time and arrived on time, 22% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 3800
The latest arrival of the period was on 13 September 2025, 4 hours 58 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 September 2025 | 4 hours 58 minutes | Carrier |
| 28 November 2025 | 2 hours 31 minutes | Carrier |
| 12 March 2026 | 1 hour 40 minutes | Extreme weather |
| 29 July 2026 | 1 hour 40 minutes | National Airspace System |
| 20 April 2026 | 1 hour 31 minutes | Carrier |
Delay causes
Why OO 3800 runs late
Carrier accounts for 71% of the 1,896 delay minutes carriers reported here, and the remaining four split what is left.
- 71%Carrier
- 16%National Airspace System
- 13%Extreme weather
Extreme weather accounts for 13% 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 2.2 times the usual weather exposure. The split is drawn from 1,896 delay minutes reported on OO 3800.
Cancellations are rare at 0.64%, 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 3.5% 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.
OO 3800 is not only a GTF to SLC flight. It also flew SLC to GTF (259 flights, 89.1% 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. 312 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 GTFthin sample | 259 | 89.1% | 53 min | 0.77% | A+ |
What to do with this
Booking OO 3800
For a booking, OO 3800 has one of the better records a US domestic flight can show: 89.4% on time and 0.64% 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 3862 on the same route97.2%
- 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.