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Route Reliability

Washington → Charleston

IAD–CHS · 442 miles · Washington Dulles International Airport to Charleston International Airport

86
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
7 min
Average arrival delay
1.4%
Cancelled
1,057
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 1,057 flights. No comparison to make.

What the data says

Morning-you made the right choice.

IAD–CHS flights departing between 6–9 AM arrived on time 95% of the time, versus 72% between 9 PM–12 AM.

Wednesday has been the better bet.

A small edge: 86% on time on Wednesdays against 81% on Fridays.

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%(159 flights)
  • Tue86%(140 flights)
  • Wed86%(146 flights)
  • Thu85%(148 flights)
  • Fri81%(152 flights)
  • Sat82%(144 flights)
  • Sun82%(153 flights)
On-time by departure window
  • 6–9 AM95%(281 flights)
  • 12–3 PM87%(356 flights)
  • 3–6 PM74%(351 flights)
  • 9 PM–12 AM72%(54 flights)
On-time trend by month
87%
May

Jun 78% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%112
July 202576%88
August 202580%89
September 202586%80
October 202592%82
November 202588%84
December 202580%75
January 202680%60
February 202690%71
March 202684%93
April 202688%99
May 202687%109

Same trip, other airports

Keep nerding

Based on 1,057 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.