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Route Reliability

Washington → Pittsburgh

IAD–PIT · 182 miles · Washington Dulles International Airport to Pittsburgh International Airport

86
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
5 min
Average arrival delay
1.5%
Cancelled
1,507
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 85% of the time across 1,507 flights. No comparison to make.

What the data says

Morning flights do better here.

IAD–PIT flights departing between 6–9 AM arrived on time 91% of the time, versus 78% between 3–6 PM.

Sunday scaries are real for this one.

IAD–PIT flights arrived on time 89% of the time on Tuesdays. On Sundays: 79%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon85%(210 flights)
  • Tue89%(215 flights)
  • Wed87%(209 flights)
  • Thu86%(211 flights)
  • Fri82%(214 flights)
  • Sat85%(213 flights)
  • Sun79%(212 flights)
On-time by departure window
  • 6–9 AM91%(358 flights)
  • 12–3 PM90%(357 flights)
  • 3–6 PM78%(412 flights)
  • 9 PM–12 AM81%(357 flights)
On-time trend by month
90%
May

Jun 71% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%139
July 202580%146
August 202585%123
September 202590%120
October 202591%124
November 202588%115
December 202577%124
January 202687%118
February 202688%110
March 202676%123
April 202696%120
May 202690%122

Same trip, other airports

Keep nerding

Based on 1,507 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.