Carrier route record
OOPDX→SJC
SkyWest Airlines · Portland to San Jose
- Flights
- 499
- Period
- July 2025 to June 2026
- Share of route
- 31%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on PDX to SJC 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 roughly 55 minutes. That rests on 499 flights, with a median arrival 7 minutes early.
Set against the rest of the country, SkyWest's PDX to SJC record is 11 points better than the US average of 77.6%. That gap is worth roughly 105 fewer late arrivals for every thousand flights.
Key figures
On time
88.1%
Arrivals under 15 minutes late, of 497 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
Whole route
82.3%
Every carrier on PDX to SJC, 1,636 flights
These figures cover 499 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.
Carrier by carrier
SkyWest against every carrier on PDX to SJC
SkyWest flew 499 of the 1,636 flights on PDX to SJC, about 31% of it. Its 88.1% on time is 6 points better than the route as a whole, which runs 82.3%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Alaska at 93.9% to Southwest at 77.3%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Alaska Airlinesthin sample | 164 | 93.9% | 85 min | 0.00% | A+ |
| SkyWest Airlines (this page) | 499 | 88.1% | 53 min | 0.00% | A+ |
| Southwest Airlines | 973 | 77.3% | 53 min | 0.41% | B+ |
Departure window
When SkyWest runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 499 flights.
- 5am–8am44 flights84.1%
- 8am–11am14 flights—
- 11am–2pm5 flights—
- 2pm–5pm324 flights88.5%
- 5pm–8pm97 flights90.7%
- 8pm–5am15 flights—
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 90.7% on time. The full set of windows spans 7 points.
Across the year
SkyWest on PDX to SJC through the year
January is the weak month at 72.2% on time, against 100.0% in June. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. December was the busiest month here, with 65 flights.
Across the week, Wednesday is the strongest day at 97.0% on time and Friday the weakest at 81.3%. 16 points is a smaller lever than departure hour, but it is free.
Delay causes
Why SkyWest runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 56% of the 3,124 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.
- 56%Late-arriving aircraft
- 32%Carrier
- 8%Extreme weather
- 4%National Airspace System
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,124 reported delay minutes here, that single category outweighs weather by 7 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,124 reported delay minutes.
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 stage length
What a delay here costs
Badly late arrivals are rare here: only 3.6% 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 569 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 return leg is a different operation and performs like one: it runs 93.0% on time across 484 flights, 5 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 5 points of difference.
One caution: this is a thin sample. 499 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 SkyWest on PDX to SJC
Put together: treat all of this as provisional. 499 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 88.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 497 completed flights over 12 months sit behind that.
Related
Where to go next
- PDX to SJC, every carrier
- SkyWest on SJC to PDX, the return leg
- Alaska Airlines on PDX to SJC93.9%
- Southwest Airlines on PDX to SJC77.3%
- SkyWest Airlines network-wide record
- Portland International (PDX) delay statistics
- Norman Y. Mineta San Jose International (SJC) delay statistics
- Why the first flight of the morning is statistically safest
- Worst months to fly in the US, ranked by the data
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.