BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
SEA→PSC

Seattle, WA (SEA) to Pasco/Kennewick/Richland, WA (PSC) flight delay odds

82.9% of 1,818 official scheduled SEA-to-PSC flights arrived on time; 9.5% arrived at least 30 minutes late and 1.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
82.9%arrived on time
9.5%30+ min late
1.0%cancelled
1,818scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.2%all scheduled flights
120+ minutes late1.2%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+2.4 mincompleted flights

Which departure time was most reliable for SEA to PSC?

Among qualifying SEA-to-PSC departure window results, Afternoon had the highest on-time rate: 85.9% of 483 flights. Night was lowest at 79.3% across 474 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning57983.9%9.3%1.6%
Afternoon48385.9%9.3%0.2%
Evening25282.9%6.7%1.6%
Night47479.3%11.0%0.8%

Which weekday was most reliable for SEA to PSC?

Among qualifying SEA-to-PSC weekday results, Tuesday had the highest on-time rate: 87.7% of 261 flights. Thursday was lowest at 78.6% across 262 flights.

DayFlightsOn time30+ minCancelled
Monday27084.4%7.8%0.4%
Tuesday26187.7%6.9%0.4%
Wednesday24384.0%9.1%1.2%
Thursday26278.6%11.8%1.5%
Friday27179.0%11.1%2.6%
Saturday24885.1%7.7%0.8%
Sunday26381.7%12.2%0.0%

Which airline was most reliable for SEA to PSC?

Among qualifying SEA-to-PSC airline results, SkyWest Airlines had the highest on-time rate: 84.2% of 1,542 flights. Alaska Airlines was lowest at 75.7% across 276 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,54284.2%9.3%0.7%
Alaska Airlines27675.7%10.5%2.5%

Which month was most reliable for SEA to PSC?

Among qualifying SEA-to-PSC month results, June 2026 had the highest on-time rate: 87.6% of 97 flights. March 2026 was lowest at 75.6% across 131 flights.

MonthFlightsOn time30+ minCancelled
July 202518581.6%10.3%0.0%
August 202518086.1%7.2%1.1%
September 202516786.2%6.6%0.0%
October 202521383.6%8.9%0.9%
November 202516383.4%6.7%4.3%
December 202515982.4%8.2%0.6%
January 202614679.5%13.7%0.7%
February 202613882.6%11.6%0.7%
March 202613175.6%15.3%3.1%
April 202610983.5%11.9%0.0%
May 202613082.3%10.8%0.0%
June 20269787.6%4.1%0.0%

What drove SEA to PSC delay minutes?

Airline was the largest recorded SEA-to-PSC delay category, accounting for 50.9% of 17,495 BTS-attributed delay minutes during July 2025–June 2026.

Airline50.9%
Late aircraft18.8%
National airspace8.7%
Weather21.0%
Security0.5%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.