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Flight Reliability

UA 2383 · United Airlines

Philadelphia → Denver (PHL–DEN)84% of its flights flew this route. The rest (DEN–IDA, RDU–DEN) are included in these numbers.

89
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min early
Average arrival delay
1.3%
Cancelled
10 min early
Median arrival delay

Based on 397 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

UA 2383 departing between 6–9 AM arrived on time 89% of the time, versus 73% between 9 AM–12 PM.

Skip Tuesday if you can.

UA 2383 arrived on time 95% of the time on Wednesdays. On Tuesdays: 84%.

Better than the PHL–DEN route average.

UA 2383 arrived on time 87% of the time, versus 77% across the PHL–DEN route.

Better than the United Airlines network average.

UA 2383 arrived on time 87% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon87%(54 flights)
  • Tue84%(56 flights)
  • Wed95%(56 flights)
  • Thu88%(56 flights)
  • Fri87%(55 flights)
  • Sat84%(57 flights)
  • Sun86%(57 flights)
On-time by departure window
  • 6–9 AM89%(358 flights)
  • 9 AM–12 PM73%(33 flights)
On-time trend by month
82%
May

Jun 83% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202594%31
August 202593%30
September 202593%29
October 202587%31
November 202590%30
December 202568%31
January 202683%29
February 202685%27
March 202697%30
April 202697%31
May 202682%62
Departures on time
91%
Diverted
0.3%
Flights flown
391
Months covered
12

Same route, other flights

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.