Flight number record
OO 3812
SkyWest Airlines · Los Angeles to Sacramento
- Route
- LAX → SMF
- Departs
- 12:00
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3812, 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 3812 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 a little over an hour. That rests on 348 flights, with a median arrival 12 minutes early.
Set against the rest of the country, OO 3812's record is 12 points better than the US average of 77.3%. That gap is worth roughly 124 fewer late arrivals for every thousand flights.
Key figures
On time
89.7%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
3.2%
National rate is 8.3%
These figures cover 348 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 3812 flies
OO 3812 flies LAX to SMF without a single fixed slot. Its most common scheduled departure was 12:00, used on 92 of 348 flights, with 12:30 (45 flights) and 12:19 (39 flights) next.
- Departs 12:0092 flights26.4%
- Departs 12:3045 flights12.9%
- Departs 12:1939 flights11.2%
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 12:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 3812 runs 11 points better at 89.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 3812 next to LAX to SMF
Every carrier on LAX to SMF combined arrived on time 84.8% of the time across 5,708 flights, so OO 3812 is 5 points ahead of it. SkyWest flew 3,559 flights on the same city pair under all its flight numbers, including this one, and those ran 87.7% on time. 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 3812thin sample | 348 | 89.7% | 75 min | 0.00% | A+ |
| All SkyWest Airlines on LAX–SMF | 3,559 | 87.7% | 76 min | 0.37% | A+ |
| All carriers on LAX–SMF | 5,708 | 84.8% | 65 min | 0.39% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3812 quarter by quarter
OO 3812 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 80.0%, a swing of 17 points on roughly 70 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 flights96.7%
- Oct–Dec 202592 flights90.2%
- Jan–Mar 202690 flights80.0%
- Apr–Jun 202687 flights93.1%
- Jul–Sep 202649 flights95.9%
Scale runs 70% to 100%.
By weekday, OO 3812 ranged from 84.3% on Thursday to 94.1% on Wednesday. With about 50 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 3812 runs when it is late
OO 3812 often beats the schedule: 124 of 348 completed flights, 36%, arrived 15 minutes or more early. The 36 late arrivals split 14 under half an hour, 11 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early124 flights35.6%
- Within 15 min188 flights54.0%
- 15–29 min late14 flights4.0%
- 30–59 min late11 flights3.2%
- 1–2 hours late5 flights1.4%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
7 of 41 late departures made up the time and arrived on time, 17% of them. Only 2 left on time and still arrived late.
The worst days
Worst days for OO 3812
The latest arrival of the period was on 30 July 2026, 7 hours 25 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 |
|---|---|---|
| 30 July 2026 | 7 hours 25 minutes | Carrier |
| 12 October 2025 | 5 hours 16 minutes | Carrier |
| 18 August 2026 | 3 hours 50 minutes | Carrier |
| 18 June 2026 | 3 hours 46 minutes | Extreme weather |
| 19 January 2026 | 2 hours 48 minutes | Extreme weather |
Delay causes
Why OO 3812 runs late
Carrier accounts for 66% of the 2,686 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Carrier
- 31%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 31% 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 5.2 times the usual weather exposure. The split is drawn from 2,686 delay minutes reported on OO 3812.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are 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 3.2% 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 3812 is not only a LAX to SMF flight. It also flew SMF to LAX (270 flights, 91.9% 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. 348 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 |
|---|---|---|---|---|---|
| SMF to LAXthin sample | 270 | 91.9% | 88 min | 0.00% | A+ |
What to do with this
Booking OO 3812
For a booking, OO 3812 has one of the better records a US domestic flight can show: 89.7% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAX to SMF, every carrier and departure
- SMF to LAX, the return direction
- SkyWest Airlines 3755 on the same route94.8%
- SkyWest Airlines 3759 on the same route87.7%
- SkyWest Airlines 4908 on the same route78.9%
- SkyWest Airlines 3712 on the same route89.0%
- Los Angeles International (LAX) delay statistics
- Sacramento International (SMF) 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.