Flight number record
OO 4041
SkyWest Airlines · San Jose to Seattle
- Route
- SJC → SEA
- Departs
- 07:15
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 18 points better than the national rate of 77.3%. 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 18 points better than the US average of 77.3%. That gap is worth roughly 178 fewer late arrivals for every thousand flights.
Key figures
On time
95.1%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.4%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 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.
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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 (81 flights) and 07:45 (38 flights) next.
- Departs 07:15112 flights32.1%
- Departs 07:2081 flights23.2%
- Departs 07:4538 flights10.9%
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 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 6 points better at 95.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 4041 next to SJC to SEA
Every carrier on SJC to SEA combined arrived on time 82.7% of the time across 4,422 flights, so OO 4041 is 12 points ahead of it. SkyWest flew 1,627 flights on the same city pair under all its flight numbers, including this one, and those ran 88.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4041thin sample | 349 | 95.1% | 83 min | 0.00% | A+ |
| All SkyWest Airlines on SJC–SEA | 1,627 | 88.7% | 63 min | 0.18% | A+ |
| All carriers on SJC–SEA | 4,422 | 82.7% | 52 min | 0.61% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4041 quarter by quarter
Quarter by quarter OO 4041 held fairly steady: 93.3% in Jul–Sep 2025, 97.5% in Oct–Dec 2025, 93.0% in Jan–Mar 2026, 93.4% in Apr–Jun 2026 and 98.4% in Jul–Sep 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 202530 flights93.3%
- Oct–Dec 202580 flights97.5%
- Jan–Mar 202686 flights93.0%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights98.4%
Scale runs 85% to 100%.
By weekday, OO 4041 ranged from 90.0% 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.
Arrival by arrival
How late OO 4041 runs when it is late
OO 4041 often beats the schedule: 207 of 349 completed flights, 59%, arrived 15 minutes or more early. The 17 late arrivals split 6 under half an hour, 6 between 30 and 60 minutes, and 5 an hour or more.
- 15+ min early207 flights59.3%
- Within 15 min125 flights35.8%
- 15–29 min late6 flights1.7%
- 30–59 min late6 flights1.7%
- 1–2 hours late2 flights0.6%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 349 completed flights by arrival against schedule.
Only 16 of 349 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for OO 4041
The latest arrival of the period was on 1 March 2026, 7 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 March 2026 | 7 hours 11 minutes | Carrier |
| 18 November 2025 | 5 hours 49 minutes | Carrier |
| 13 March 2026 | 2 hours 7 minutes | Carrier |
| 11 August 2026 | 1 hour 19 minutes | Carrier |
| 10 September 2025 | 1 hour 7 minutes | Carrier |
Delay causes
Why OO 4041 runs late
Carrier accounts for 88% of the 1,418 delay minutes carriers reported here, and the remaining four split what is left.
- 88%Carrier
- 10%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 88%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,245 of the 1,418 delay minutes reported here. The split is drawn from 1,418 delay minutes reported on OO 4041.
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 1.4% 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.
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.
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: 95.1% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SJC to SEA, every carrier and departure
- SEA to SJC, the return direction
- Alaska Airlines 1311 on the same route89.6%
- SkyWest Airlines 3736 on the same route91.7%
- Norman Y. Mineta San Jose International (SJC) delay statistics
- Seattle-Tacoma International (SEA) 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.