Best Time to Fly SEA to PIT: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Pittsburgh International
Data through July 2026 · Last updated October 18, 2026
470 flights were scheduled from Seattle (SEA) to Pittsburgh (PIT) in the last 12 months, and 77.9% of those that flew arrived on time, in line with the US 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 (84% on time) and August the worst month (65%).
The cancellation rate was 0.6% (US average 1.8%).
SEA to PIT 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 | 77.9% | 48 min | 0.6% | 470 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to PIT
On-time arrival % by scheduled departure hour (local time), 899 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 75.0% | 0.0% | 113 |
| 10am–11am | 83.7% | 0.0% | 172 |
| 11am–12pm | 70.9% | 1.1% | 281 |
| 1pm–2pm | 88.1% | 0.0% | 84 |
| 2pm–3pm | Limited data | 3 | |
| 9pm–10pm | 81.0% | 3.1% | 65 |
| 10pm–11pm | 68.6% | 0.0% | 51 |
| 11pm–12am | 79.5% | 0.8% | 130 |
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 PIT
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 | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 76.7% | -5.3 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 65.8% | -16.1 pts | 0.8% | 247 |
| All other days | 82.0% | — | 0.7% | 609 |
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).