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Flight Reliability

UA 3543 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3543 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

84%
Arrive within 15 minutes
1 min
Average arrival delay
0.5%
Cancelled
9 min early
Median arrival delay

Based on 381 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(55 flights)
  • Tue85%(54 flights)
  • Wed91%(53 flights)
  • Thu83%(53 flights)
  • Fri83%(53 flights)
  • Sat82%(54 flights)
  • Sun82%(56 flights)
On-time by departure window
  • 6–9 AM—(2 flights)
  • 9 AM–12 PM95%(75 flights)
  • 12–3 PM83%(297 flights)
  • 3–6 PM—(4 flights)
On-time trend by month
88%
May

Jun 93% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202573%30
August 202581%31
September 202587%30
October 202587%31
November 202583%29
December 202573%30
February 2026100%18
March 202673%33
April 202693%60
May 202688%48
Departures on time
87%
Diverted
0.3%
Flights flown
378
Months covered
12

Keep nerding

Based on 381 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.