Carrier route record

OOPDX→OAK

SkyWest Airlines · Portland to Oakland

Flights: 155
Period: September 2025 to August 2026
Share of route: 12%
Carriers: 3

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on PDX to OAK 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 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 155 flights, with a median arrival 11 minutes early.

Set against the rest of the country, SkyWest's PDX to OAK record is 16 points better than the US average of 77.3%. That gap is worth roughly 156 fewer late arrivals for every thousand flights.

On time

92.9%

Arrivals under 15 minutes late, of 154 completed flights

Avg delay

42 min

Across delayed arrivals only, not all flights

Cancelled

0.65%

National rate is 1.89%

Whole route

77.2%

Every carrier on PDX to OAK, 1,319 flights

These figures cover 155 flights between September 2025 and August 2026. The median arrival is 11 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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Carrier by carrier

SkyWest against every carrier on PDX to OAK

SkyWest flew 155 of the 1,319 flights on PDX to OAK, about 12% of it. Its 92.9% on time is 16 points better than the route as a whole, which runs 77.2%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Alaska at 100.0% to Southwest at 74.7%. 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.

On-time performance by carrier on PDX to OAK
Airline	Flights	On time	Avg delay	Cancelled	Grade
Alaska Airlinesthin sample	16	100.0%	—	0.00%	A+
SkyWest Airlines (this page)thin sample	155	92.9%	42 min	0.65%	A+
Southwest Airlines	1,148	74.7%	48 min	0.78%	C+

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Departure window

When SkyWest runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 13 points, against half a point between the best and worst carrier.

5am–8am5 flights—
8am–11am83 flights96.3%
11am–2pm—
2pm–5pm20 flights—
5pm–8pm36 flights83.3%
8pm–5am11 flights—

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 96.3% of the time, against 83.3% for the evening window. That is 13 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 83 flights scheduled in it.

Across the year

SkyWest on PDX to OAK through the year

Oct–Dec 20258 flights—
Jan–Mar 202625 flights—
Apr–Jun 202649 flights91.8%
Jul–Sep 202673 flights97.2%

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

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 92.9% on time across 155 flights.

Split by quarter, SkyWest on PDX to OAK logged 8 flights in Oct–Dec 2025, 25 flights in Jan–Mar 2026, 49 flights in Apr–Jun 2026 and 73 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 92.9% annual figure is the one to use.

Arrival by arrival

How late SkyWest on PDX to OAK runs when it is late

SkyWest on PDX to OAK often beats the schedule: 55 of 154 completed flights, 36%, arrived 15 minutes or more early. Most of the lateness is short. 6 of the 11 late arrivals were under half an hour behind, and 2 reached an hour or more.

15+ min early55 flights35.7%
Within 15 min88 flights57.1%
15–29 min late6 flights3.9%
30–59 min late3 flights1.9%
1–2 hours late1 flights0.6%
2+ hours late1 flights0.6%

Scale runs 0% to 100%.

Share of 154 completed flights by arrival against schedule.

Only 12 of 154 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 SkyWest on PDX to OAK

The latest arrival of the period was on 14 May 2026, 2 hours 25 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of SkyWest on PDX to OAK in the period
Date	Arrived late by	Largest filed cause
14 May 2026	2 hours 25 minutes	Late-arriving aircraft
15 December 2025	1 hour 6 minutes	Carrier
6 June 2026	56 minutes	Carrier
22 June 2026	33 minutes	Carrier
15 August 2026	30 minutes	Carrier

Delay causes

Why SkyWest runs late on this route

Carrier accounts for 52% of the 461 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
52%
Late-arriving aircraft
47%
National Airspace System
1%

47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 461 reported delay minutes here, that single category outweighs weather by 47 to one. The split is drawn from 461 reported delay minutes.

The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 239 of the 461 delay minutes reported here.

Cancellations are rare at 0.65%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is 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 1.3% 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 543 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 return leg is a different operation and performs like one: it runs 89.5% on time across 172 flights, 3 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 3 points of difference.

One caution: this is a thin sample. 155 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 OAK

Put together: treat all of this as provisional. 155 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 92.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 154 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures