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Flight Reliability

UA 5550 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5550 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

73%
Arrive within 15 minutes
27 min
Average arrival delay
2.1%
Cancelled
6 min early
Median arrival delay

Based on 333 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(50 flights)
  • Tue73%(40 flights)
  • Wed72%(39 flights)
  • Thu77%(51 flights)
  • Fri69%(51 flights)
  • Sat78%(46 flights)
  • Sun63%(49 flights)
On-time by departure window
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM78%(120 flights)
  • 3–6 PM91%(91 flights)
  • 6–9 PM51%(110 flights)
  • 9 PM–12 AM—(3 flights)
On-time trend by month
90%
May

Jun 47% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202560%30
August 202577%31
September 202583%23
October 202582%28
November 202578%27
December 202537%30
January 202681%21
February 202692%24
March 202691%21
April 202670%30
May 202690%31
Departures on time
74%
Diverted
0%
Flights flown
326
Months covered
12

Keep nerding

Based on 333 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.