Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 5388 · United Airlines

Denver → HLN (DEN–HLN)

86
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
5 min
Average arrival delay
0.3%
Cancelled
5 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Wednesday if you can.

UA 5388 arrived on time 89% of the time on Tuesdays. On Wednesdays: 78%.

A bit ahead of the DEN–HLN route.

UA 5388 arrived on time 83% of the time, versus 79% across the DEN–HLN route.

A bit ahead of the United Airlines network.

UA 5388 arrived on time 83% of the time, versus 79% across the United Airlines network.

It basically never cancels.

Out of 365 scheduled flights, only 0.3% were cancelled.

The breakdown

On-time by weekday
  • Mon79%(52 flights)
  • Tue89%(52 flights)
  • Wed78%(50 flights)
  • Thu80%(51 flights)
  • Fri83%(52 flights)
  • Sat83%(52 flights)
  • Sun89%(52 flights)
On-time by departure window
  • 9 AM–12 PM83%(306 flights)
  • 12–3 PM84%(55 flights)
On-time trend by month
94%
May

Jun 67% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%30
July 202577%30
August 202567%30
September 202593%30
October 202597%31
November 202590%29
December 202577%30
January 202684%31
February 202686%28
March 202674%31
April 202690%30
May 202694%31
Departures on time
82%
Diverted
0.8%
Flights flown
361
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.