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Flight Reliability

UA 1339 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1339 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

87%
Arrive within 15 minutes
3 min early
Average arrival delay
0.5%
Cancelled
10 min early
Median arrival delay

Based on 666 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(94 flights)
  • Tue90%(94 flights)
  • Wed93%(91 flights)
  • Thu86%(94 flights)
  • Fri86%(92 flights)
  • Sat81%(98 flights)
  • Sun82%(94 flights)
On-time by departure window
  • 3–6 AM96%(331 flights)
  • 9 AM–12 PM78%(326 flights)
On-time trend by month
97%
May

Jun 72% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%58
July 202573%60
August 202576%50
September 202590%39
October 202594%62
November 202597%59
December 202590%62
January 202692%61
February 202689%55
March 202683%60
April 202693%60
May 202697%31
Departures on time
91%
Diverted
0.9%
Flights flown
657
Months covered
12

Keep nerding

Based on 666 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.