Carrier route record

OOSEA→PSC

SkyWest Airlines · Seattle to Pasco

Flights: 1,542
Period: July 2025 to June 2026
Share of route: 85%
Carriers: 2

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

SkyWest on SEA to PSC earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 1,542 flights, with a median arrival 8 minutes early.

Set against the rest of the country, SkyWest's SEA to PSC record is 7 points better than the US average of 77.6%. That gap is worth roughly 73 fewer late arrivals for every thousand flights.

On time

84.9%

Arrivals under 15 minutes late, of 1,528 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

0.71%

National rate is 1.81%

Whole route

83.9%

Every carrier on SEA to PSC, 1,818 flights

These figures cover 1,542 flights between July 2025 and June 2026. The median arrival is 8 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 SEA to PSC

SkyWest flew 1,542 of the 1,818 flights on SEA to PSC, most of the route. Its 84.9% on time is about level with the route as a whole at 83.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 84.9% to Alaska at 77.7%. 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 SEA to PSC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	1,542	84.9%	66 min	0.71%	B+
Alaska Airlinesthin sample	276	77.7%	39 min	2.54%	B

Flight by flight

SkyWest flight numbers on SEA to PSC

OO 401722:5085.1% · 365 flights

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 11 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am415 flights90.1%
11am–2pm205 flights78.8%
2pm–5pm406 flights86.9%
5pm–8pm71 flights81.4%
8pm–5am445 flights81.7%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

The weak window here is the middle of the day, not the evening: 11am–2pm runs 78.8% on time against 90.1% for 8am–11am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8pm–5am window is the busiest, with 445 flights scheduled in it.

Across the year

SkyWest on SEA to PSC through the year

Darker means more delays. Figures are on-time percentages.November best, March worst

November is the best month on the calendar at 90.6% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. October was the busiest month here, with 181 flights.

Across the week, Tuesday is the strongest day at 90.0% on time and Thursday the weakest at 80.5%. 10 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. Carrier accounts for 52% of the 15,000 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
52%
Extreme weather
24%
Late-arriving aircraft
15%
National Airspace System
8%
Security
1%

Extreme weather accounts for 24% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.9 times the usual weather exposure. The split is drawn from 15,160 reported delay minutes.

The largest share of delay minutes, 52%, 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 7,917 of the 15,000 delay minutes reported here.

Cancellations are rare at 0.71%, below the national 1.81% 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 4.5% 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.

At 172 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.

The return leg is a different operation and performs like one: it runs 89.2% on time across 1,543 flights, 4 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 4 points of difference.

The sample behind these figures is 1,542 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.

What to do with this

Booking SkyWest on SEA to PSC

Put together: the calendar is the biggest lever here, not the carrier or the hour. November runs 90.6% on time and March 76.8%, a swing of 14 points. If the dates move at all, move them out of March before you think about anything else. 1,528 completed flights over 12 months sit behind that.

Where to go next

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