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Flight Reliability

UA 5799 · United Airlines

Milwaukee → Chicago (MKE–ORD)99% of its flights flew this route. The rest (FCA–DEN) are included in these numbers.

82
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
3 min early
Average arrival delay
2.5%
Cancelled
19 min early
Median arrival delay

Based on 354 historical flights. Data through May 2026.

What the data says

Mondays have been rough.

UA 5799 arrived on time 92% of the time on Fridays and just 77% on Mondays. That gap is worth planning around.

Well ahead of the MKE–ORD route.

UA 5799 arrived on time 86% of the time, versus 68% across the MKE–ORD route.

A bit ahead of the United Airlines network.

UA 5799 arrived on time 86% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon77%(51 flights)
  • Tue90%(50 flights)
  • Wed88%(48 flights)
  • Thu84%(50 flights)
  • Fri92%(49 flights)
  • Sat85%(47 flights)
  • Sun84%(49 flights)
On-time by departure window
  • 3–6 AM85%(341 flights)
  • 3–6 PM—(3 flights)
On-time trend by month
91%
May

Jun 93% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202593%30
August 202583%30
September 202593%30
October 202581%31
November 202596%28
December 202571%31
January 202690%29
February 202685%27
March 202668%28
April 202682%27
May 202691%23
Departures on time
89%
Diverted
0.3%
Flights flown
344
Months covered
12

Same route, other flights

Keep nerding

Based on 354 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.