Historical on-time performance
Seattle to Pittsburgh
2,125 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–PIT arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 344 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time74%Medianon timep9045 minCancel0.6%Flights344
Why flights run late
Delay causes
- Airline37%
- Weather0%
- Air traffic (NAS)16%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → PIT
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 72% to 79% on time.
- Mornings79% on time · p90 25 min · 497 flights
- Middays77% on time · p90 40 min · 458 flights
- Overnights72% on time · p90 30 min · 326 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 82% on time.
- Mondays82% on time · p90 30 min · 190 flights · limited
- Tuesdays80% on time · p90 30 min · 176 flights · limited
- Sundays78% on time · p90 30 min · 198 flights · limited
- Wednesdays78% on time · p90 30 min · 183 flights · limited
- Thursdays76% on time · p90 30 min · 198 flights · limited
- Saturdays73% on time · p90 35 min · 169 flights · limited
- Fridays72% on time · p90 40 min · 200 flights
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