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Flight Reliability

UA 1443 · United Airlines

Washington → Charlotte Amalie (IAD–STT)

92
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
5 min early
Average arrival delay
1.0%
Cancelled
11 min early
Median arrival delay

Based on 307 historical flights. Data through May 2026.

What the data says

Monday has been the better bet.

A small edge: 91% on time on Mondays against 84% on Saturdays.

Better than the United Airlines network average.

UA 1443 arrived on time 88% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 1443 arrived on time 92% of the time over the last three months in the data, compared with 88% in the three months before that.

The breakdown

On-time by weekday
  • Mon91%(43 flights)
  • Tue91%(42 flights)
  • Wed86%(42 flights)
  • Thu91%(42 flights)
  • Fri86%(42 flights)
  • Sat84%(51 flights)
  • Sun86%(42 flights)
On-time by departure window
  • 6–9 AM87%(294 flights)
  • 9 AM–12 PM90%(10 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 202584%31
January 202683%29
February 202696%28
March 202681%31
April 2026100%30
May 202697%31
Departures on time
93%
Diverted
0%
Flights flown
304
Months covered
12

Same route, other flights

Keep nerding

Based on 307 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.