Carrier route record
OOSJC→PDX
SkyWest Airlines · San Jose to Portland
- Flights
- 484
- Period
- July 2025 to June 2026
- Share of route
- 30%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SJC to PDX earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 484 flights, with a median arrival 13 minutes early.
Set against the rest of the country, SkyWest's SJC to PDX record is 15 points better than the US average of 77.6%. That gap is worth roughly 154 fewer late arrivals for every thousand flights.
Key figures
On time
93.0%
Arrivals under 15 minutes late, of 484 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
Whole route
84.9%
Every carrier on SJC to PDX, 1,621 flights
These figures cover 484 flights between July 2025 and June 2026. The median arrival is 13 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 SJC to PDX
SkyWest flew 484 of the 1,621 flights on SJC to PDX, about 30% of it. Its 93.0% on time is 8 points better than the route as a whole, which runs 84.9%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Alaska at 95.1% to Southwest at 79.1%. 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 | 95.1% | 101 min | 0.00% | A+ |
| SkyWest Airlines (this page) | 484 | 93.0% | 66 min | 0.00% | A+ |
| Southwest Airlines | 973 | 79.1% | 50 min | 0.00% | 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 484 flights.
- 5am–8am22 flights—
- 8am–11am80 flights92.5%
- 11am–2pm271 flights92.6%
- 2pm–5pm32 flights93.8%
- 5pm–8pm78 flights92.3%
- 8pm–5am1 flights—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
The time of day barely matters here. The 2pm–5pm window tops the set at 93.8% and 5pm–8pm sits at 92.3%, 2 points apart across 484 flights. Pick the departure that suits the trip: whatever is going wrong here is not accumulating over the course of the day. The 11am–2pm window is the busiest, with 271 flights scheduled in it.
Across the year
SkyWest on SJC to PDX through the year
November is the best month on the calendar at 96.8% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. December was the busiest month here, with 65 flights.
Across the week, Wednesday is the strongest day at 100.0% on time and Friday the weakest at 84.3%. 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 79% of the 2,240 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.
- 79%Late-arriving aircraft
- 14%Carrier
- 4%Extreme weather
- 2%National Airspace System
79% 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 2,240 reported delay minutes here, that single category outweighs weather by 20 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 2,240 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 2.7% 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 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 88.1% on time across 499 flights, 5 points below 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. 484 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 SJC to PDX
Put together: treat all of this as provisional. 484 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 93.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 484 completed flights over 12 months sit behind that.
Related
Where to go next
- SJC to PDX, every carrier
- SkyWest on PDX to SJC, the return leg
- Alaska Airlines on SJC to PDX95.1%
- Southwest Airlines on SJC to PDX79.1%
- SkyWest Airlines network-wide record
- Norman Y. Mineta San Jose International (SJC) delay statistics
- Portland International (PDX) 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.