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Route Reliability

Washington → Charlotte Amalie

IAD–STT · 1,606 miles · Washington Dulles International Airport to Cyril E. King Airport

92
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
5 min early
Average arrival delay
1.2%
Cancelled
328
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 88% of the time across 328 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

IAD–STT flights departing between 12–3 PM arrived on time 100% of the time, versus 87% between 6–9 AM.

Monday comes out ahead.

A small edge: 91% on time on Mondays against 86% on Saturdays.

Flights on this route

The breakdown

On-time by weekday
  • Mon91%(46 flights)
  • Tue91%(44 flights)
  • Wed86%(44 flights)
  • Thu91%(45 flights)
  • Fri87%(45 flights)
  • Sat86%(55 flights)
  • Sun87%(45 flights)
On-time by departure window
  • 6–9 AM87%(294 flights)
  • 9 AM–12 PM90%(10 flights)
  • 12–3 PM100%(20 flights)
On-time trend by month
97%
May

Jun 90% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202581%31
August 202584%19
October 202570%10
November 202583%30
December 202589%45
January 202685%33
February 202696%28
March 202681%31
April 2026100%30
May 202697%33

Same trip, other airports

Keep nerding

Based on 328 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.