Carrier route record
ASPSC→SEA
Alaska Airlines · Pasco to Seattle
- Flights
- 214
- Period
- September 2025 to August 2026
- Share of route
- 13%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Alaska Airlines.
Alaska on PSC to SEA earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 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 214 flights, with a median arrival 10 minutes early.
Set against the rest of the country, Alaska's PSC to SEA record is 9 points better than the US average of 77.3%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.
Key figures
On time
85.8%
Arrivals under 15 minutes late, of 212 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
0.93%
National rate is 1.89%
Whole route
88.6%
Every carrier on PSC to SEA, 1,679 flights
These figures cover 214 flights between September 2025 and August 2026. The median arrival is 10 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
Alaska against every carrier on PSC to SEA
Alaska flew 214 of the 1,679 flights on PSC to SEA, about 13% of it. Its 85.8% on time is 3 points worse than the route as a whole, which runs 88.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 89.0% to Alaska at 85.8%.
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 |
|---|---|---|---|---|---|
| SkyWest Airlines | 1,465 | 89.0% | 88 min | 0.75% | A+ |
| Alaska Airlines (this page)thin sample | 214 | 85.8% | 93 min | 0.93% | A+ |
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Departure window
When Alaska 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 214 flights.
- 5am–8am31 flights80.6%
- 8am–11am183 flights86.7%
- 11am–2pm—
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am—
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 86.7% on time for the 8am–11am window against 80.6% for 5am–8am. Worth taking if the schedule allows, not worth an extra connection. The 8am–11am window is the busiest, with 183 flights scheduled in it.
Across the year
Alaska on PSC to SEA through the year
- Jul–Sep 202530 flights80.0%
- Oct–Dec 2025103 flights85.3%
- Jan–Mar 202681 flights88.8%
Scale runs 70% to 95%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 85.8% on time across 214 flights.
Quarter by quarter Alaska on PSC to SEA held fairly steady: 80.0% in Jul–Sep 2025, 85.3% in Oct–Dec 2025 and 88.8% in Jan–Mar 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
Across the week, Monday is the strongest day at 87.5% on time and Tuesday the weakest at 78.1%, a spread of 9 points.
Arrival by arrival
How late Alaska on PSC to SEA runs when it is late
Alaska on PSC to SEA often beats the schedule: 84 of 212 completed flights, 40%, arrived 15 minutes or more early. The 30 late arrivals split 10 under half an hour, 7 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early84 flights39.6%
- Within 15 min98 flights46.2%
- 15–29 min late10 flights4.7%
- 30–59 min late7 flights3.3%
- 1–2 hours late8 flights3.8%
- 2+ hours late5 flights2.4%
Scale runs 0% to 100%.
Share of 212 completed flights by arrival against schedule.
7 of 31 late departures made up the time and arrived on time, 23% of them. 6 flights left on time and still arrived late.
The worst days
Worst days for Alaska on PSC to SEA
The latest arrival of the period was on 1 January 2026, 9 hours 18 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 January 2026 | 9 hours 18 minutes | Late-arriving aircraft |
| 21 November 2025 | 8 hours 8 minutes | Carrier |
| 22 November 2025 | 5 hours 14 minutes | Late-arriving aircraft |
| 6 January 2026 | 2 hours 23 minutes | Late-arriving aircraft |
| 29 December 2025 | 2 hours 9 minutes | Carrier |
Delay causes
Why Alaska runs late on this route
Late-arriving aircraft accounts for 43% of the 2,796 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 34%Carrier
- 21%National Airspace System
- 2%Extreme weather
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,796 reported delay minutes here, that single category outweighs weather by 19 to one. The split is drawn from 2,796 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.7% on time here.
Cancellations sit at 0.93% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
6.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
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 79.3% on time across 213 flights, 7 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 7 points of difference.
One caution: this is a thin sample. 214 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 Alaska on PSC to SEA
Put together: treat all of this as provisional. 214 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 85.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 212 completed flights over 12 months sit behind that.
Related
Where to go next
- PSC to SEA, every carrier
- Alaska on SEA to PSC, the return leg
- SkyWest Airlines on PSC to SEA89.0%
- Alaska Airlines network-wide record
- Seattle-Tacoma International (SEA) delay statistics
- Why the first flight of the morning is statistically safest
- The best day of the week to fly, and why it is the second lever
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.