Flight number record

OO 4041

SkyWest Airlines · San Jose to Seattle

Route: SJC → SEA
Departs: 07:15
Flights: 349
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4041, 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 4041 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 349 flights, with a median arrival 18 minutes early.

Set against the rest of the country, OO 4041's record is 17 points better than the US average of 77.6%. That gap is worth roughly 170 fewer late arrivals for every thousand flights.

On time

94.6%

Arrivals under 15 minutes late, of 349 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

1.7%

National rate is 8.1%

These figures cover 349 flights between July 2025 and June 2026. The median arrival is 18 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 4041 flies

OO 4041 flies SJC to SEA without a single fixed slot. Its most common scheduled departure was 07:15, used on 112 of 349 flights, with 07:20 (48 flights) and 07:45 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:15112 flights32.1%
Departs 07:2048 flights13.8%
Departs 07:4538 flights10.9%

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 07:15 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4041 runs 5 points better at 94.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4041 next to SJC to SEA

Every carrier on SJC to SEA combined arrived on time 83.3% of the time across 4,368 flights, so OO 4041 is 11 points ahead of it. SkyWest flew 1,563 flights on the same city pair under all its flight numbers, including this one, and those ran 89.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 16 points.

OO 4041 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4041thin sample	349	94.6%	84 min	0.00%	A+
All SkyWest Airlines on SJC–SEA	1,563	89.5%	66 min	0.19%	A+
All carriers on SJC–SEA	4,368	83.3%	52 min	0.78%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4041 quarter by quarter

Quarter by quarter OO 4041 held fairly steady: 94.6% in Jul–Sep 2025, 97.5% in Oct–Dec 2025, 93.0% in Jan–Mar 2026 and 93.4% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights94.6%
Oct–Dec 202580 flights97.5%
Jan–Mar 202686 flights93.0%
Apr–Jun 202691 flights93.4%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4041 ranged from 90.2% on Tuesday to 100.0% on Saturday. 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.

Delay causes

Why OO 4041 runs late

One category carries most of the weight here. Carrier accounts for 81% of the 1,602 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
81%
National Airspace System
18%
Extreme weather
2%

The largest share of delay minutes, 81%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,292 of the 1,602 delay minutes reported here. The split is drawn from 1,602 delay minutes reported on OO 4041.

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 1.7% 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 two other city pairs in the data, including DTW to MSN (16) and MSN to DTW (16), but none flew often enough under OO 4041 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SJC to SEA 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 4041

For a booking, OO 4041 has one of the better records a US domestic flight can show: 94.6% 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