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Route Reliability

Phoenix → Washington

PHX–IAD · 1,956 miles · Phoenix Sky Harbor International Airport to Washington Dulles International Airport

86
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
0 min
Average arrival delay
0.6%
Cancelled
1,155
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines89%791 flights
  2. 2.Southwest Airlines76%364 flights

What the data says

The late departure is the smart one here.

PHX–IAD flights departing between 9 PM–12 AM arrived on time 92% of the time, versus 81% between 9 AM–12 PM.

Sunday scaries are real for this one.

PHX–IAD flights arrived on time 88% of the time on Saturdays. On Sundays: 78%.

United Airlines runs this route best.

United Airlines arrived on time 89% of the time on this route; Southwest Airlines managed 76%.

Recent months have been rougher.

PHX–IAD flights arrived on time 83% of the time over the last three months in the data, compared with 93% 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
  • Mon86%(163 flights)
  • Tue87%(156 flights)
  • Wed87%(160 flights)
  • Thu85%(164 flights)
  • Fri86%(165 flights)
  • Sat88%(161 flights)
  • Sun78%(166 flights)
On-time by departure window
  • 12–3 AM—(2 flights)
  • 6–9 AM84%(377 flights)
  • 9 AM–12 PM81%(312 flights)
  • 12–3 PM85%(165 flights)
  • 3–6 PM91%(118 flights)
  • 9 PM–12 AM92%(161 flights)
On-time trend by month
83%
May

Jun 83% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%87
July 202574%87
August 202579%87
September 202584%87
October 202584%97
November 202590%108
December 202588%108
January 202698%95
February 202693%81
March 202681%113
April 202686%91
May 202683%94

Same trip, other airports

Keep nerding

Based on 1,155 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.