Flight number record

OO 3812

SkyWest Airlines · Los Angeles to Sacramento

Route: LAX → SMF
Departs: 12:00
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 361 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 3812's record is 11 points better than the US average of 77.6%. That gap is worth roughly 110 fewer late arrivals for every thousand flights.

On time

88.6%

Arrivals under 15 minutes late, of 361 completed flights

Avg delay

59 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

3.0%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 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.

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 77 of 361 flights, with 12:30 (66 flights) and 12:19 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:0077 flights21.3%
Departs 12:3066 flights18.3%
Departs 12:1939 flights10.8%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 78.8%, and OO 3812 runs 10 points better at 88.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 3812 next to LAX to SMF

Every carrier on LAX to SMF combined arrived on time 84.6% of the time across 5,634 flights, so OO 3812 is 4 points ahead of it. SkyWest flew 3,517 flights on the same city pair under all its flight numbers, including this one, and those ran 87.8% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 10 points.

OO 3812 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3812thin sample	361	88.6%	59 min	0.00%	A+
All SkyWest Airlines on LAX–SMF	3,517	87.8%	74 min	0.43%	A+
All carriers on LAX–SMF	5,634	84.6%	63 min	0.41%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3812 quarter by quarter

OO 3812 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.1% on time and its weakest Jan–Mar 2026 at 80.0%, a swing of 13 points on roughly 90 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 202592 flights91.3%
Oct–Dec 202592 flights90.2%
Jan–Mar 202690 flights80.0%
Apr–Jun 202687 flights93.1%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3812 ranged from 82.7% on Thursday to 94.1% on Sunday. With about 52 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.

Delay causes

Why OO 3812 runs late

One category carries most of the weight here. Carrier accounts for 62% of the 2,411 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
62%
Extreme weather
35%
National Airspace System
3%

Extreme weather accounts for 35% 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 5.6 times the usual weather exposure. The split is drawn from 2,411 delay minutes reported on OO 3812.

Cancellations are rare at 0.00%, below the national 1.81% 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 3.0% land an hour or more behind schedule, against 8.1% 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 (283 flights, 91.5% 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. 361 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.

Other routes flown as OO 3812
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SMF to LAXthin sample	283	91.5%	66 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: 88.6% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures