Pasco/Kennewick/Richland (PSC) to Seattle (SEA): On-Time Performance
Data through May 2026
The calendar drives reliability on PSC–SEA. October 2024 flights landed on schedule 93% of the time, but February 2025 dropped to 77% — a gap of 16 points. Across the full period the route averages 87% on-time against a national 78%.
- On-time
- 87%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 5.2
- last 12 months
- Duration
- 1h 13m
- scheduled
- Distance
- 172 mi
Best airline from PSC to SEA
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 88% | 9 min | 0.4% | 3,134 |
| Alaska Airlines | 80% | 15 min | 1.3% | 672 |
Monthly on-time trend
Best time to fly from PSC to SEA
Aim for departures around 5 a.m. (95% on-time); avoid 6 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 88% | 8 min |
| Tuesdaybest | 88% | 10 min |
| Wednesday | 86% | 10 min |
| Thursday | 88% | 10 min |
| Friday | 86% | 10 min |
| Saturday | 85% | 11 min |
| Sunday | 86% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft21%
- Airline operations50%
- National airspace system12%
- Weather17%
- Security1%
Frequently asked questions
- How often are flights from PSC to SEA delayed?
- 13% of PSC–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 10 minutes.
- Which airline is most reliable from PSC to SEA?
- SkyWest Airlines has the best on-time record on this route at 88%, based on 3,134 flights. 2 airlines flew PSC–SEA frequently enough to compare in this period.
- What is the best time of day to fly from PSC to SEA?
- Departures around 5 a.m. have the best record (95% on-time), while departures around 6 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PSC to SEA?
- The scheduled PSC–SEA flight time averages 1h 13m over 172 miles. Actual arrival times vary — flights on this route land 15+ minutes late 13% of the time.
- How often are PSC to SEA flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from PSC to SEA?
- February 2025 was the roughest month in this dataset, with only 77% of arrivals on time. The best was October 2024 at 93%. If your dates are flexible, that 16-point gap is worth planning around.
Explore related pages
More routes from PSC
Based on 3,806 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.