Best Time to Fly SEA to SIT: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Sitka Rocky Gutierrez
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.9% of Seattle (SEA) to Sitka (SIT) flights arrived on time (243 scheduled flights). That is 5.7 points below the national average of 77.6%.
Alaska Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (73% on time) and August the worst month (57%).
The cancellation rate was 0.0% (US average 1.8%).
SEA to SIT 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 |
|---|---|---|---|---|
| Alaska Airlines | 71.9% | 47 min | 0.0% | 243 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to SIT
On-time arrival % by scheduled departure hour (local time), 517 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 11am–12pm | 63.5% | 0.0% | 283 |
| 5pm–6pm | 52.9% | 2.7% | 37 |
| 9pm–10pm | 68.4% | 0.5% | 196 |
| 11pm–12am | Limited data | 1 | |
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 SIT
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 60.4% | -8.5 pts | 1.1% | 263 |
| All other days | 68.9% | — | 0.0% | 254 |
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).