Best Time to Fly SEA to PSC: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Tri Cities
Data through July 2026 · Last updated October 18, 2026
1,726 flights were scheduled from Seattle (SEA) to Pasco/Kennewick/Richland (PSC) in the last 12 months, and 83.5% of those that flew arrived on time, 5.9 points above the US average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 84.2% on time and Alaska Airlines was last with 79.4%.
Over 24 months, Tuesday was the most reliable day (86% on time) and February the worst month (76%).
The cancellation rate was 1.0% (US average 1.8%).
SEA to PSC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 84.2% | 66 min | 0.7% | 1,481 |
| Alaska Airlines | 79.4% | 40 min | 2.9% | 245 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to PSC
On-time arrival % by scheduled departure hour (local time), 3,652 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 73.3% | 0.0% | 46 |
| 9am–10am | 89.3% | 0.0% | 742 |
| 10am–11am | 88.2% | 0.0% | 136 |
| 11am–12pm | 68.6% | 3.9% | 232 |
| 12pm–1pm | 81.0% | 0.0% | 42 |
| 1pm–2pm | 79.1% | 0.0% | 86 |
| 2pm–3pm | 76.9% | 0.0% | 65 |
| 3pm–4pm | 86.0% | 0.1% | 683 |
| 4pm–5pm | 80.6% | 0.0% | 108 |
| 5pm–6pm | 72.2% | 1.4% | 73 |
| 6pm–7pm | Limited data | 27 | |
| 7pm–8pm | 80.4% | 1.1% | 356 |
| 8pm–9pm | 74.6% | 0.6% | 174 |
| 9pm–10pm | 86.7% | 0.4% | 265 |
| 10pm–11pm | 77.1% | 0.4% | 543 |
| 11pm–12am | 69.4% | 2.7% | 74 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SEA to PSC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 88.4% | +5.8 pts | 0.0% | 87 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.1% | -0.5 pts | 0.5% | 186 |
| Summer peak (Jun 15 - Aug 15) | 77.9% | -4.7 pts | 0.3% | 600 |
| All other days | 82.6% | — | 0.7% | 2,779 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).