PIT to SEA flight delays & on-time performance
Nonstop flights from Pittsburgh International Airport to Seattle–Tacoma International Airport · 2,125 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PIT or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Pittsburgh (PIT) to Seattle (SEA) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.1% were cancelled, and 7% arrived an hour or more late.
- Alaska Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 7am did best (89% on time); around 6pm did worst (66%).
- Wednesday was the most reliable day to fly (81% on time) and Thursday the least (62%).
- The largest source of delay minutes was late-arriving aircraft (51%).
Which airline is most on time from PIT to SEA?
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 | 74% | 1.1% | 15 min | 7.1% | 470 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am89%107 flights
- 8am81%52 flights
- 6pm66%79 flights
- 7pm68%232 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday77%1.4% cancelled
- Tuesday80%0.0% cancelled
- Wednesday81%0.0% cancelled
- Thursday62%1.5% cancelled
- Friday77%2.7% cancelled
- Saturday70%0.0% cancelled
- Sunday68%1.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft51%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)17%
- Extreme weather5%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather60%
- Airline (crew, maintenance, cleaning, fueling)40%
- Air traffic control & airport congestion0%
- Security0%
PIT to SEA: common questions
- How often are PIT to SEA flights on time?
- 74% 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 Pittsburgh to Seattle cancelled?
- 1.1% of scheduled flights were cancelled (5 of 470).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 52 min behind schedule on average, and 7.1% of flights were an hour or more late.
- How long is taxi time at PIT?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to PIT — 78% on time
More flights from Pittsburgh
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PIT → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.