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Flight Reliability

UA 5640 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5640 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
18 min
Average arrival delay
2.3%
Cancelled
2 min early
Median arrival delay

Based on 351 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon69%(52 flights)
  • Tue65%(52 flights)
  • Wed75%(52 flights)
  • Thu73%(51 flights)
  • Fri69%(49 flights)
  • Sat68%(40 flights)
  • Sun66%(47 flights)
On-time by departure window
  • 9 AM–12 PM83%(116 flights)
  • 12–3 PM61%(158 flights)
  • 3–6 PM65%(69 flights)
On-time trend by month
71%
May

Jun 96% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%23
July 202548%29
August 202564%28
September 202596%27
October 202587%31
November 202573%30
December 202557%30
January 202659%27
February 202671%28
March 202662%29
April 202653%30
May 202671%31
Departures on time
73%
Diverted
0%
Flights flown
343
Months covered
12

Keep nerding

Based on 351 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.