SEA to PSC flight delays
Seattle, WA (SEA) Pasco/Kennewick/Richland, WA (PSC) · 172 miles
1,818 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
83.86%
Arrived on time
Within 15 minutes of schedule
0.99%
Cancelled
Share of scheduled flights
60 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. SkyWest Airlines arrived on time 7.3 points more often than Alaska Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
Flights from Seattle to Pasco/Kennewick/Richland keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, SkyWest Airlines arrived on time most often on SEA to PSC. Alaska Airlines was late most often. Flights ran closest to schedule in June and worst in March.
Every airline on SEA to PSC
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 1,542 | 84.95% | 0.71% | 66 min | B |
| Alaska Airlines | 276 | 77.7% | 2.54% | 39 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
Other routes from Seattle
Common questions
Are flights from Seattle to Pasco/Kennewick/Richland usually delayed?
83.86% of flights on the SEA to PSC route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Seattle to Pasco/Kennewick/Richland?
SkyWest Airlines, at 84.95% on time across 1,542 flights. The least punctual on the route was Alaska Airlines at 77.7%.
How often are SEA to PSC flights cancelled?
0.99% of scheduled flights did not operate — about 10 in every thousand. That is in the normal range.
What is the best month to fly Seattle to Pasco/Kennewick/Richland?
June, when 87.6% of flights arrived on time. The worst was March at 78%.
When SEA to PSC flights are late, how late are they?
About 60 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SEA to PSC during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →