Flight number record

OO 3789

SkyWest Airlines · Seattle to San Jose

Route: SEA → SJC
Departs: 11:45
Flights: 349
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3789, 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 3789 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 349 flights, with a median arrival 7 minutes early.

Set against the rest of the country, OO 3789's record is 7 points better than the US average of 77.6%. That gap is worth roughly 69 fewer late arrivals for every thousand flights.

On time

84.5%

Arrivals under 15 minutes late, of 349 completed flights

Avg delay

59 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

4.6%

National rate is 8.1%

These figures cover 349 flights between July 2025 and June 2026. The median arrival is 7 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 3789 flies

OO 3789 flies SEA to SJC without a single fixed slot. Its most common scheduled departure was 11:45, used on 55 of 349 flights, with 11:25 (52 flights) and 10:20 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:4555 flights15.8%
Departs 11:2552 flights14.9%
Departs 10:2041 flights11.7%

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 11:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 3789 runs 6 points better at 84.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 3789 next to SEA to SJC

Every carrier on SEA to SJC combined arrived on time 81.6% of the time across 4,371 flights, so OO 3789 is 3 points ahead of it. SkyWest flew 1,562 flights on the same city pair under all its flight numbers, including this one, and those ran 88.0% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 6 points.

OO 3789 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3789thin sample	349	84.5%	59 min	0.00%	B+
All SkyWest Airlines on SEA–SJC	1,562	88.0%	61 min	0.19%	A+
All carriers on SEA–SJC	4,371	81.6%	48 min	0.80%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3789 quarter by quarter

OO 3789 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.3% on time and its weakest Jul–Sep 2025 at 80.4%, a swing of 12 points on roughly 87 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 flights80.4%
Oct–Dec 202580 flights83.8%
Jan–Mar 202686 flights81.4%
Apr–Jun 202691 flights92.3%

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

By weekday, OO 3789 did best on Sunday at 91.8% on time and worst on Saturday at 79.6%. Each day rests on about 50 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3789 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 3,205 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
45%
Extreme weather
42%
National Airspace System
13%

Extreme weather accounts for 42% 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 6.7 times the usual weather exposure. The split is drawn from 3,205 delay minutes reported on OO 3789.

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 4.6% 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.

The 696 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on three other city pairs in the data, including SJC to SEA (134), STL to DTW (15) and LEX to DTW (1), but none flew often enough under OO 3789 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to SJC only.

One caution: this is a thin sample. 349 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 3789

For a booking, read OO 3789 as 84.5% on time with 0.00% cancelled over 349 flights. Those are rates from the past twelve months, not a forecast for any particular 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