Best Time to Fly SEA to LWS: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Lewiston Nez Perce County
Data through July 2026 · Last updated October 18, 2026
364 flights were scheduled from Seattle (SEA) to Lewiston (LWS) in the last 12 months, and 91.5% of those that flew arrived on time, 13.8 points above the US average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (97% on time) and August the worst month (84%).
The cancellation rate was 0.3% (US average 1.8%).
SEA to LWS 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 | 91.5% | 77 min | 0.3% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to LWS
On-time arrival % by scheduled departure hour (local time), 729 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5pm–6pm | Limited data | 6 | |
| 6pm–7pm | Limited data | 6 | |
| 7pm–8pm | 92.1% | 0.2% | 433 |
| 8pm–9pm | Limited data | 14 | |
| 9pm–10pm | 88.4% | 0.8% | 245 |
| 10pm–11pm | Limited data | 25 | |
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 LWS
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) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 90.0% | -1.4 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 85.4% | -6.0 pts | 0.0% | 123 |
| All other days | 91.4% | — | 0.5% | 562 |
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).