Seattle (SEA) to Pasco/Kennewick/Richland (PSC): On-Time Performance
Data through July 2026
The calendar drives reliability on SEA–PSC. November 2024 flights landed on schedule 90% of the time, but February 2025 dropped to 68% — a gap of 22 points. Across the full period the route averages 82% on-time against a national 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 4.7
- last 12 months
- Duration
- 1h 6m
- scheduled
- Distance
- 172 mi
Best airline from SEA to PSC
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 83% | 10 min | 0.4% | 3,188 |
| Alaska Airlines | 74% | 13 min | 1.4% | 641 |
Monthly on-time trend
Best time to fly from SEA to PSC
Aim for departures around 9 a.m. (89% on-time); avoid 5 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 10 min |
| Tuesdaybest | 85% | 9 min |
| Wednesday | 82% | 12 min |
| Thursday | 79% | 12 min |
| Friday | 83% | 10 min |
| Saturday | 84% | 9 min |
| Sunday | 79% | 14 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 operations48%
- National airspace system11%
- Weather19%
- Security1%
Frequently asked questions
- How often are flights from SEA to PSC delayed?
- 18% of SEA–PSC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from SEA to PSC?
- SkyWest Airlines has the best on-time record on this route at 83%, based on 3,188 flights. 2 airlines flew SEA–PSC frequently enough to compare in this period.
- What is the best time of day to fly from SEA to PSC?
- Departures around 9 a.m. have the best record (89% on-time), while departures around 5 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 SEA to PSC?
- The scheduled SEA–PSC flight time averages 1h 6m over 172 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are SEA to PSC flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SEA to PSC?
- February 2025 was the roughest month in this dataset, with only 68% of arrivals on time. The best was November 2024 at 90%. If your dates are flexible, that 22-point gap is worth planning around.
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Based on 3,829 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.