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Flight Reliability

UA 5339 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5339 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

79%
Arrive within 15 minutes
12 min
Average arrival delay
2.2%
Cancelled
4 min early
Median arrival delay

Based on 362 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon66%(50 flights)
  • Tue88%(51 flights)
  • Wed82%(51 flights)
  • Thu78%(49 flights)
  • Fri80%(50 flights)
  • Sat88%(50 flights)
  • Sun73%(51 flights)
On-time by departure window
  • 6–9 AM90%(222 flights)
  • 9 AM–12 PM72%(25 flights)
  • 12–3 PM—(1 flights)
  • 6–9 PM59%(104 flights)
On-time trend by month
33%
May

Jun 77% → May 33% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202583%30
August 202590%31
September 2025100%30
October 2025100%31
November 202586%28
December 202572%29
January 202690%30
February 202684%25
March 202697%30
April 202636%28
May 202633%30
Departures on time
82%
Diverted
0.6%
Flights flown
352
Months covered
12

Keep nerding

Based on 362 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.