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

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

77.1% of 471 official scheduled SEA-to-PIT flights arrived on time; 14.9% arrived at least 30 minutes late and 0.8% 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
77.1%arrived on time
14.9%30+ min late
0.8%cancelled
471scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.2%all scheduled flights
120+ minutes late1.5%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+3.5 mincompleted flights

Which departure time was most reliable for SEA to PIT?

Among qualifying SEA-to-PIT departure window results, Night had the highest on-time rate: 82.6% of 132 flights. Late morning was lowest at 74.9% across 339 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning33974.9%16.2%0.9%
Night13282.6%11.4%0.8%

Which weekday was most reliable for SEA to PIT?

Among qualifying SEA-to-PIT weekday results, Tuesday had the highest on-time rate: 84.6% of 65 flights. Friday was lowest at 68.5% across 73 flights.

DayFlightsOn time30+ minCancelled
Monday7275.0%16.7%0.0%
Tuesday6584.6%10.8%0.0%
Wednesday6683.3%7.6%0.0%
Thursday7276.4%16.7%0.0%
Friday7368.5%20.5%4.1%
Saturday5182.4%13.7%0.0%
Sunday7272.2%16.7%1.4%

Which airline was most reliable for SEA to PIT?

Only Alaska Airlines met the SEA-to-PIT airline threshold: 77.1% of 471 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines47177.1%14.9%0.8%

Which month was most reliable for SEA to PIT?

Among qualifying SEA-to-PIT month results, October 2025 had the highest on-time rate: 90.9% of 33 flights. July 2025 was lowest at 64.5% across 62 flights.

MonthFlightsOn time30+ minCancelled
July 20256264.5%27.4%1.6%
August 20255865.5%25.9%0.0%
September 20255284.6%9.6%0.0%
October 20253390.9%3.0%3.0%
November 20252684.6%3.8%0.0%
December 20252965.5%13.8%0.0%
January 20262475.0%8.3%8.3%
February 20262080.0%10.0%0.0%
March 20262676.9%15.4%0.0%
April 20263080.0%13.3%0.0%
May 20265184.3%13.7%0.0%
June 20266081.7%13.3%0.0%

What drove SEA to PIT delay minutes?

Airline was the largest recorded SEA-to-PIT delay category, accounting for 45.4% of 5,387 BTS-attributed delay minutes during July 2025–June 2026.

Airline45.4%
Late aircraft39.8%
National airspace12.4%
Weather2.3%
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.