Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 543 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 543 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

80%
Arrive within 15 minutes
8 min
Average arrival delay
2.2%
Cancelled
3 min early
Median arrival delay

Based on 455 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(63 flights)
  • Tue84%(61 flights)
  • Wed81%(62 flights)
  • Thu81%(64 flights)
  • Fri75%(65 flights)
  • Sat84%(61 flights)
  • Sun84%(69 flights)
On-time by departure window
  • 3–6 AM99%(71 flights)
  • 6–9 AM84%(146 flights)
  • 9 AM–12 PM66%(88 flights)
  • 3–6 PM78%(87 flights)
  • 6–9 PM69%(52 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
72%
May

Jun 100% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%29
July 202596%28
August 202590%31
September 202578%27
October 202587%31
November 202570%30
December 202568%25
January 202680%30
February 202685%27
March 202684%57
April 202667%58
May 202672%72
Departures on time
82%
Diverted
0%
Flights flown
445
Months covered
12

Keep nerding

Based on 455 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.