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Flight Reliability

UA 5277 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5277 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

70%
Arrive within 15 minutes
23 min
Average arrival delay
3.7%
Cancelled
0 min
Median arrival delay

Based on 352 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(47 flights)
  • Tue75%(51 flights)
  • Wed71%(48 flights)
  • Thu69%(48 flights)
  • Fri74%(49 flights)
  • Sat73%(48 flights)
  • Sun58%(48 flights)
On-time by departure window
  • 9 AM–12 PM—(3 flights)
  • 12–3 PM75%(264 flights)
  • 3–6 PM71%(21 flights)
  • 6–9 PM44%(50 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
95%
May

Jun 63% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202571%31
August 202577%31
September 202576%29
October 202587%31
November 202575%28
December 202564%25
January 202670%30
February 202668%28
March 202642%26
April 202652%29
May 202695%21
Departures on time
75%
Diverted
0%
Flights flown
339
Months covered
12

Keep nerding

Based on 352 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.