SEA to PIT flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Pittsburgh International Airport · 2,125 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or PIT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Pittsburgh (PIT) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 0.6% were cancelled, and 5% arrived an hour or more late.
- Alaska Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 9pm did best (90% on time); around 10pm did worst (69%).
- Tuesday was the most reliable day to fly (86% on time) and Friday the least (71%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (48%).
Which airline is most on time from SEA to PIT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 78% | 0.6% | 12 min | 5.2% | 470 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 9am75%52 flights
- 10am83%107 flights
- 11am74%180 flights
- 9pm90%29 flights
- 10pm69%51 flights
- 11pm86%51 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%0.0% cancelled
- Tuesday86%0.0% cancelled
- Wednesday83%0.0% cancelled
- Thursday72%0.0% cancelled
- Friday71%2.7% cancelled
- Saturday82%0.0% cancelled
- Sunday75%1.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)48%
- Late-arriving aircraft35%
- Air traffic control & airport congestion12%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion0%
- Security0%
SEA to PIT: common questions
- How often are SEA to PIT flights on time?
- 78% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Seattle to Pittsburgh cancelled?
- 0.6% of scheduled flights were cancelled (3 of 470).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 48 min behind schedule on average, and 5.2% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PIT to SEA — 74% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → PIT, nonstop flights by US airlines that report to the DOT. How we calculate this.