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Route Reliability

ROA → Washington

ROA–IAD · 177 miles · ROA Airport to Washington Dulles International Airport

84
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
11 min
Average arrival delay
1.8%
Cancelled
1,040
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 84% of the time across 1,040 flights. No comparison to make.

What the data says

Morning-you made the right choice.

ROA–IAD flights departing between 9 AM–12 PM arrived on time 90% of the time, versus 75% between 3–6 PM.

Skip Monday if you can.

ROA–IAD flights arrived on time 89% of the time on Saturdays. On Mondays: 81%.

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
  • Mon81%(148 flights)
  • Tue88%(149 flights)
  • Wed85%(148 flights)
  • Thu81%(155 flights)
  • Fri82%(148 flights)
  • Sat89%(125 flights)
  • Sun82%(148 flights)
On-time by departure window
  • 6–9 AM86%(198 flights)
  • 9 AM–12 PM90%(258 flights)
  • 12–3 PM79%(186 flights)
  • 3–6 PM75%(132 flights)
  • 6–9 PM85%(247 flights)
On-time trend by month
78%
May

Jun 75% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%103
July 202575%67
August 202580%75
September 202588%84
October 202595%98
November 202587%109
December 202576%90
January 202692%66
February 202692%52
March 202681%82
April 202694%86
May 202678%109

Keep nerding

Based on 1,040 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.