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

Washington, DC (IAD) to Pittsburgh, PA (PIT) flight delay odds

83.1% of 1,268 official scheduled IAD-to-PIT flights arrived on time; 10.4% arrived at least 30 minutes late and 1.5% 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
83.1%arrived on time
10.4%30+ min late
1.5%cancelled
1,268scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.8%all scheduled flights
120+ minutes late3.0%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+4.7 mincompleted flights

Which departure time was most reliable for IAD to PIT?

Among qualifying IAD-to-PIT departure window results, Early morning had the highest on-time rate: 91.2% of 261 flights. Evening was lowest at 76.4% across 330 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning26191.2%3.1%1.1%
Afternoon31387.2%9.6%1.3%
Evening33076.4%14.5%2.1%
Night36479.9%12.6%1.4%

Which weekday was most reliable for IAD to PIT?

Among qualifying IAD-to-PIT weekday results, Tuesday had the highest on-time rate: 87.1% of 194 flights. Sunday was lowest at 76.1% across 184 flights.

DayFlightsOn time30+ minCancelled
Monday19282.8%9.4%2.6%
Tuesday19487.1%7.2%1.0%
Wednesday19784.3%11.7%1.5%
Thursday19584.6%9.7%1.0%
Friday18485.3%10.3%0.0%
Saturday12280.3%9.8%0.8%
Sunday18476.1%14.7%3.3%

Which airline was most reliable for IAD to PIT?

Among qualifying IAD-to-PIT airline results, United Airlines had the highest on-time rate: 86.4% of 499 flights. Republic Airways was lowest at 81.0% across 769 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways76981.0%12.2%2.0%
United Airlines49986.4%7.6%0.8%

Which month was most reliable for IAD to PIT?

Among qualifying IAD-to-PIT month results, April 2026 had the highest on-time rate: 94.8% of 96 flights. July 2025 was lowest at 71.3% across 129 flights.

MonthFlightsOn time30+ minCancelled
July 202512971.3%20.2%6.2%
August 202510583.8%9.5%1.0%
September 202511190.1%6.3%0.0%
October 202511190.1%5.4%0.0%
November 202510887.0%8.3%0.9%
December 202510277.5%12.7%0.0%
January 202611384.1%7.1%5.3%
February 202610486.5%5.8%1.0%
March 202611573.0%19.1%0.9%
April 20269694.8%0.0%0.0%
May 20268886.4%9.1%1.1%
June 20268675.6%19.8%0.0%

What drove IAD to PIT delay minutes?

Late aircraft was the largest recorded IAD-to-PIT delay category, accounting for 45.8% of 15,312 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.5%
Late aircraft45.8%
National airspace15.3%
Weather8.4%
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.