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Flight Reliability

UA 2644 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2644 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

78%
Arrive within 15 minutes
10 min
Average arrival delay
0.2%
Cancelled
5 min early
Median arrival delay

Based on 532 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(76 flights)
  • Tue77%(77 flights)
  • Wed79%(77 flights)
  • Thu76%(72 flights)
  • Fri72%(75 flights)
  • Sat84%(73 flights)
  • Sun72%(79 flights)
On-time by departure window
  • 12–3 PM88%(41 flights)
  • 3–6 PM80%(236 flights)
  • 6–9 PM74%(251 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
77%
May

Jun 76% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%54
July 202560%20
August 202558%40
September 202574%54
October 202587%37
November 202586%59
December 202566%32
January 202683%57
February 202686%56
March 202683%59
April 202677%30
May 202677%31
Departures on time
76%
Diverted
0.4%
Flights flown
529
Months covered
12

Keep nerding

Based on 532 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.