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

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

Historically, 87.0% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,266 flights.

HISTORICAL ROUTE SIGNALLower disruption
87.0%arrived on time
5.6%30+ min late
1.4%cancelled
1,266scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.3%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival-3.8 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning36096.9%1.1%0.8%
Late morning26392.8%4.2%0.8%
Afternoon31473.9%9.9%1.6%
Evening32984.2%7.6%2.4%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday19284.4%5.2%2.1%
Tuesday19289.1%5.7%1.6%
Wednesday19786.8%4.6%1.0%
Thursday19689.8%6.1%0.5%
Friday18485.3%7.1%0.0%
Saturday12295.9%1.6%1.6%
Sunday18380.9%7.7%3.3%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways76786.8%5.1%1.8%
United Airlines49987.4%6.4%0.8%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202512976.0%7.0%7.0%
August 202510588.6%4.8%0.0%
September 202511191.9%4.5%0.0%
October 202511184.7%3.6%0.0%
November 202510890.7%3.7%0.0%
December 202510288.2%7.8%0.0%
January 202611287.5%6.2%5.4%
February 202610487.5%3.8%1.0%
March 202611487.7%9.6%0.0%
April 20269690.6%2.1%0.0%
May 20268890.9%3.4%1.1%
June 20268682.6%10.5%1.2%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline12.3%
Late aircraft49.7%
National airspace35.2%
Weather2.8%
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.