SEA to PSC flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Tri Cities Airport · 172 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or PSC 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 Pasco/Kennewick/Richland (PSC) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 4% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (84% on time); Alaska Airlines was the least (79%).
- Departures scheduled around 9am did best (91% on time); around 11pm did worst (69%).
- Tuesday was the most reliable day to fly (88% on time) and Thursday the least (81%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (52%).
Which airline is most on time from SEA to PSC?
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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 84% | 0.7% | 11 min | 4.7% | 1,481 |
| Alaska Airlines | 79% | 2.9% | 10 min | 2.9% | 245 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am72%30 flights
- 9am91%234 flights
- 10am88%136 flights
- 11am75%147 flights
- 12pm91%22 flights
- 1pm79%86 flights
- 2pm78%37 flights
- 3pm88%297 flights
- 4pm90%42 flights
- 5pm75%25 flights
- 6pm70%27 flights
- 7pm86%134 flights
- 8pm91%67 flights
- 9pm87%187 flights
- 10pm73%182 flights
- 11pm69%73 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday84%0.4% cancelled
- Tuesday88%0.4% cancelled
- Wednesday83%1.3% cancelled
- Thursday81%1.6% cancelled
- Friday81%2.7% cancelled
- Saturday85%0.8% cancelled
- Sunday82%0.0% 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)52%
- Extreme weather22%
- Late-arriving aircraft17%
- Air traffic control & airport congestion8%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather44%
- Air traffic control & airport congestion39%
- Airline (crew, maintenance, cleaning, fueling)17%
- Security0%
SEA to PSC: common questions
- How often are SEA to PSC flights on time?
- 84% 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 Pasco/Kennewick/Richland cancelled?
- 1.0% of scheduled flights were cancelled (18 of 1,726).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 62 min behind schedule on average, and 4.5% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PSC to SEA — 88% 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 → PSC, nonstop flights by US airlines that report to the DOT. How we calculate this.