Flight number record

OO 3883

SkyWest Airlines · Los Angeles to San Jose

Route: LAX → SJC
Departs: 18:00
Flights: 316
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3883, 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 3883 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 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 316 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 3883's record is 12 points better than the US average of 77.6%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.

On time

89.9%

Arrivals under 15 minutes late, of 316 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

2.2%

National rate is 8.1%

These figures cover 316 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 3883 flies

OO 3883 flies LAX to SJC without a single fixed slot. Its most common scheduled departure was 18:00, used on 108 of 316 flights, with 17:55 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:00108 flights34.2%
Departs 17:5534 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 18:00 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3883 runs 22 points better at 89.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 3883 next to LAX to SJC

Every carrier on LAX to SJC combined arrived on time 86.6% of the time across 4,429 flights, so OO 3883 is 3 points ahead of it. SkyWest flew 2,049 flights on the same city pair under all its flight numbers, including this one, and those ran 91.4% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 11 points.

OO 3883 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3883thin sample	316	89.9%	49 min	0.00%	A+
All SkyWest Airlines on LAX–SJC	2,049	91.4%	55 min	0.34%	A+
All carriers on LAX–SJC	4,429	86.6%	52 min	0.79%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3883 quarter by quarter

OO 3883 did not run the same all year. Its best quarter was Apr–Jun 2026 at 95.0% on time and its weakest Oct–Dec 2025 at 82.8%, a swing of 12 points on roughly 79 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 flights93.5%
Oct–Dec 202587 flights82.8%
Jan–Mar 202677 flights89.6%
Apr–Jun 202660 flights95.0%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3883 ranged from 85.1% on Sunday to 93.8% on Tuesday. With about 45 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 3883 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 1,555 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
53%
National Airspace System
29%
Extreme weather
19%

Extreme weather accounts for 19% 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 3.0 times the usual weather exposure. The split is drawn from 1,555 delay minutes reported on OO 3883.

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 2.2% 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 3883 is not only a LAX to SJC flight. It also flew SJC to LAX (297 flights, 93.3% 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. 316 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 3883
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SJC to LAXthin sample	297	93.3%	51 min	0.00%	A+

What to do with this

Booking OO 3883

For a booking, OO 3883 has one of the better records a US domestic flight can show: 89.9% 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