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

Pittsburgh, PA (PIT) to Seattle, WA (SEA) flight delay odds

70.1% of 471 official scheduled PIT-to-SEA flights arrived on time; 18.5% arrived at least 30 minutes late and 1.3% 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 SIGNALGenerally reliable
70.1%arrived on time
18.5%30+ min late
1.3%cancelled
471scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.3%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+7.7 mincompleted flights

Which departure time was most reliable for PIT to SEA?

Among qualifying PIT-to-SEA departure window results, Early morning had the highest on-time rate: 79.9% of 159 flights. Evening was lowest at 65.1% across 312 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning15979.9%10.1%2.5%
Evening31265.1%22.8%0.6%

Which weekday was most reliable for PIT to SEA?

Among qualifying PIT-to-SEA weekday results, Wednesday had the highest on-time rate: 78.1% of 73 flights. Thursday was lowest at 63.6% across 66 flights.

DayFlightsOn time30+ minCancelled
Monday7268.1%22.2%1.4%
Tuesday6377.8%12.7%1.6%
Wednesday7378.1%13.7%0.0%
Thursday6663.6%21.2%1.5%
Friday7371.2%17.8%1.4%
Saturday5865.5%19.0%1.7%
Sunday6665.2%22.7%1.5%

Which airline was most reliable for PIT to SEA?

Only Alaska Airlines met the PIT-to-SEA airline threshold: 70.1% of 471 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines47170.1%18.5%1.3%

Which month was most reliable for PIT to SEA?

Among qualifying PIT-to-SEA month results, November 2025 had the highest on-time rate: 92.3% of 26 flights. December 2025 was lowest at 41.4% across 29 flights.

MonthFlightsOn time30+ minCancelled
July 20256256.5%25.8%3.2%
August 20255860.3%27.6%0.0%
September 20255284.6%5.8%0.0%
October 20253491.2%5.9%2.9%
November 20252692.3%3.8%0.0%
December 20252941.4%48.3%0.0%
January 20262365.2%13.0%8.7%
February 20262176.2%14.3%0.0%
March 20262650.0%30.8%0.0%
April 20263073.3%20.0%0.0%
May 20265080.0%12.0%2.0%
June 20266071.7%15.0%0.0%

What drove PIT to SEA delay minutes?

Late aircraft was the largest recorded PIT-to-SEA delay category, accounting for 51.3% of 7,331 BTS-attributed delay minutes during July 2025–June 2026.

Airline16.9%
Late aircraft51.3%
National airspace25.3%
Weather6.5%
Security0.0%
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.