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Flight Reliability

UA 5234 · United Airlines

Chicago → Milwaukee (ORD–MKE)82% of its flights flew this route. The rest (GRB–ORD, FWA–ORD) are included in these numbers.

68
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
3.9%
Cancelled
9 min early
Median arrival delay

Based on 388 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 81% of the time, against 75% between 6–9 AM.

Saturday has been the better bet.

A small edge: 79% on time on Saturdays against 74% on Wednesdays.

Better than the ORD–MKE route average.

UA 5234 arrived on time 77% of the time, versus 64% across the ORD–MKE route.

Keep a backup plan handy.

UA 5234 was cancelled 3.9% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon76%(54 flights)
  • Tue78%(55 flights)
  • Wed74%(54 flights)
  • Thu77%(52 flights)
  • Fri76%(53 flights)
  • Sat79%(52 flights)
  • Sun79%(52 flights)
On-time by departure window
  • 6–9 AM75%(16 flights)
  • 9 AM–12 PM77%(335 flights)
  • 12–3 PM81%(21 flights)
On-time trend by month
82%
May

Jun 97% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202560%30
August 202581%31
September 202590%30
October 202586%36
November 202596%26
December 202561%28
January 202650%30
February 202674%27
March 202667%27
April 202674%27
May 202682%50
Departures on time
81%
Diverted
0.3%
Flights flown
372
Months covered
12

Same route, other flights

Keep nerding

Based on 388 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.