69% of PIT → SEA flights arrived on time in June-August 2026 (172 flights). The most reliable was AS 78, on time 83% of the time on this route. Morning flights did best (83%), evening flights worst (57%). Pittsburgh (PIT): no delay reported. Seattle (SEA): no delay reported.
Best time of day to fly PIT → SEA
| Morning (before noon) | |
| Evening (after 5 PM) |
Flights PIT → SEA, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| AS 78 Alaska Airlines | 7:30 AM | 0% | |
| AS 412 Alaska Airlines | 6:10 PM | 0.6% |
PIT conditions · SEA conditions · SEA → PIT · 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.