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Flight Reliability

UA 1646 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1646 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

69%
Arrive within 15 minutes
16 min
Average arrival delay
1.5%
Cancelled
1 min early
Median arrival delay

Based on 410 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(59 flights)
  • Tue78%(54 flights)
  • Wed70%(56 flights)
  • Thu73%(59 flights)
  • Fri60%(60 flights)
  • Sat69%(55 flights)
  • Sun58%(59 flights)
On-time by departure window
  • 6–9 AM88%(33 flights)
  • 9 AM–12 PM91%(35 flights)
  • 12–3 PM80%(136 flights)
  • 3–6 PM53%(178 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM58%(19 flights)
On-time trend by month
65%
May

Jun 30% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202530%20
July 202564%55
August 202545%31
September 202592%36
October 202562%61
November 202577%57
December 202572%32
February 202677%17
March 202664%25
April 202697%30
May 202665%31
Departures on time
74%
Diverted
0.5%
Flights flown
402
Months covered
12

Keep nerding

Based on 410 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.