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Flight Reliability

UA 5309 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5309 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

65%
Arrive within 15 minutes
23 min
Average arrival delay
5.0%
Cancelled
2 min
Median arrival delay

Based on 397 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(50 flights)
  • Tue66%(55 flights)
  • Wed74%(57 flights)
  • Thu68%(53 flights)
  • Fri53%(51 flights)
  • Sat63%(54 flights)
  • Sun63%(57 flights)
On-time by departure window
  • 9 AM–12 PM96%(24 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM72%(29 flights)
  • 6–9 PM63%(245 flights)
  • 9 PM–12 AM59%(70 flights)
On-time trend by month
61%
May

Jun 60% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202561%28
August 202569%29
September 202570%30
October 202581%31
November 202572%25
December 202535%29
January 202670%30
February 202671%28
March 202684%32
April 202656%52
May 202661%33
Departures on time
68%
Diverted
0%
Flights flown
377
Months covered
12

Keep nerding

Based on 397 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.