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Route Reliability

Philadelphia → Washington

PHL–IAD · 135 miles · Philadelphia International Airport to Washington Dulles International Airport

76
Usually Fine
WanderNerd Reliability Score
81%
Arrive within 15 minutes
12 min
Average arrival delay
2.9%
Cancelled
1,097
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 81% of the time across 1,097 flights. No comparison to make.

What the data says

Morning-you made the right choice.

PHL–IAD flights departing between 6–9 AM arrived on time 88% of the time, versus 75% between 6–9 PM.

Friday is doing you no favors.

PHL–IAD flights arrived on time 86% of the time on Saturdays. On Fridays: 76%.

Ticking up lately.

PHL–IAD flights arrived on time 84% of the time over the last three months in the data, compared with 80% in the three months before that.

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
  • Mon79%(162 flights)
  • Tue86%(164 flights)
  • Wed79%(160 flights)
  • Thu78%(162 flights)
  • Fri76%(157 flights)
  • Sat86%(124 flights)
  • Sun82%(135 flights)
On-time by departure window
  • 6–9 AM88%(105 flights)
  • 9 AM–12 PM85%(326 flights)
  • 12–3 PM77%(100 flights)
  • 3–6 PM82%(223 flights)
  • 6–9 PM75%(310 flights)
On-time trend by month
82%
May

Jun 69% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%111
July 202573%104
August 202583%97
September 202587%82
October 202585%92
November 202591%76
December 202571%90
January 202674%82
February 202695%74
March 202681%83
April 202688%77
May 202682%96

Same trip, other airports

Keep nerding

Based on 1,097 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.