77% of SIT → SEA flights arrived on time in June-August 2026 (152 flights). The most reliable was AS 651, on time 81% of the time on this route. Morning flights did best (81%), afternoon flights worst (74%). SIT (SIT): no delay reported. Seattle (SEA): no delay reported.
Best time of day to fly SIT → SEA
| Morning (before noon) | |
| Afternoon (noon-5 PM) |
Flights SIT → SEA, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| AS 651 Alaska Airlines | 7:00 AM | 1.3% | |
| AS 652 Alaska Airlines | 2:08 PM | 1.1% |
SEA conditions · SEA → SIT · Cancellations
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From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.