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Flight Reliability

UA 3550 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3550 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

82%
Arrive within 15 minutes
1 min early
Average arrival delay
2.0%
Cancelled
9 min early
Median arrival delay

Based on 393 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(54 flights)
  • Tue90%(50 flights)
  • Wed89%(52 flights)
  • Thu75%(55 flights)
  • Fri86%(57 flights)
  • Sat84%(55 flights)
  • Sun72%(61 flights)
On-time by departure window
  • 6–9 AM79%(137 flights)
  • 9 AM–12 PM85%(183 flights)
  • 12–3 PM90%(29 flights)
  • 3–6 PM66%(35 flights)
On-time trend by month
97%
May

Jun 88% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%32
July 202590%31
August 202584%31
September 202593%30
October 202574%34
November 202584%43
December 202562%39
January 202672%29
February 202677%26
March 202690%30
April 202673%30
May 202697%29
Departures on time
88%
Diverted
0.3%
Flights flown
384
Months covered
12

Keep nerding

Based on 393 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.