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Flight Reliability

UA 660 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 660 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

85%
Arrive within 15 minutes
1 min early
Average arrival delay
0.8%
Cancelled
8 min early
Median arrival delay

Based on 499 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(73 flights)
  • Tue90%(62 flights)
  • Wed87%(61 flights)
  • Thu89%(75 flights)
  • Fri78%(74 flights)
  • Sat85%(75 flights)
  • Sun81%(75 flights)
On-time by departure window
  • 6–9 AM86%(336 flights)
  • 9 AM–12 PM83%(159 flights)
On-time trend by month
90%
May

Jun 97% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%35
July 202585%52
August 202587%31
September 202587%30
October 202574%31
November 202587%30
December 202565%31
January 202676%55
February 202689%37
March 202692%51
April 202684%50
May 202690%62
Departures on time
90%
Diverted
0%
Flights flown
495
Months covered
12

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Based on 499 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.