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Flight Reliability

UA 5438 · United Airlines

Denver → MRY (DEN–MRY)

94
Nerd Approved
WanderNerd Reliability Score
86%
Arrive within 15 minutes
1 min
Average arrival delay
0%
Cancelled
7 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

UA 5438 arrived on time 90% of the time on Sundays. On Mondays: 81%.

A bit ahead of the DEN–MRY route.

UA 5438 arrived on time 86% of the time, versus 81% across the DEN–MRY route.

Better than the United Airlines network average.

UA 5438 arrived on time 86% of the time, versus 79% across the United Airlines network.

It basically never cancels.

Out of 363 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon81%(52 flights)
  • Tue89%(52 flights)
  • Wed86%(51 flights)
  • Thu83%(52 flights)
  • Fri87%(52 flights)
  • Sat89%(52 flights)
  • Sun90%(52 flights)
On-time trend by month
94%
May

Jun 70% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%30
July 202584%31
August 202594%31
September 202593%30
October 202597%31
November 202587%30
December 202558%31
January 202684%31
February 202693%27
March 202690%30
April 202693%30
May 202694%31
Departures on time
87%
Diverted
0%
Flights flown
363
Months covered
12

Same route, other flights

Keep nerding

Based on 363 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.