Best Time to Fly LWS to SEA: On-Time Stats by Hour & Airline
Lewiston Nez Perce County → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 90.0% of Lewiston (LWS) to Seattle (SEA) flights arrived on time (364 scheduled flights). That is 12.4 points above the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Friday was the most reliable day (92% on time) and February the worst month (80%).
The cancellation rate was 0.3% (US average 1.8%).
LWS to SEA 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 | 90.0% | 71 min | 0.3% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LWS to SEA
On-time arrival % by scheduled departure hour (local time), 729 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 95.6% | 0.0% | 92 |
| 7am–8am | 89.4% | 0.5% | 551 |
| 8am–9am | 96.8% | 0.0% | 31 |
| 9am–10am | 81.8% | 0.0% | 55 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LWS to SEA
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) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 86.2% | -4.5 pts | 0.0% | 123 |
| All other days | 90.7% | — | 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).