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Flight Reliability

UA 4685 · United Airlines

DLH → Chicago (DLH–ORD)90% of its flights flew this route. The rest (ATW–ORD, FSD–ORD) are included in these numbers.

33
Bring Snacks
WanderNerd Reliability Score
58%
Arrive within 15 minutes
34 min
Average arrival delay
5.0%
Cancelled
8 min
Median arrival delay

Based on 362 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 61% of the time, against 58% between 3–6 PM.

Wednesday is the weak spot.

UA 4685 arrived on time 65% of the time on Tuesdays. On Wednesdays: 51%.

Lagging the DLH–ORD route.

UA 4685 arrived on time 58% of the time, versus 70% across the DLH–ORD route.

Well behind the United Airlines network.

UA 4685 arrived on time 58% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon57%(49 flights)
  • Tue65%(48 flights)
  • Wed51%(51 flights)
  • Thu54%(50 flights)
  • Fri56%(50 flights)
  • Sat64%(47 flights)
  • Sun60%(48 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 12–3 PM61%(36 flights)
  • 3–6 PM58%(306 flights)
On-time trend by month
58%
May

Jun 60% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202550%30
August 202557%28
September 202567%30
October 202571%28
November 202563%27
December 202552%29
January 202650%30
February 202667%27
March 202659%27
April 202642%26
May 202658%31
Departures on time
67%
Diverted
0.3%
Flights flown
343
Months covered
12

Same route, other flights

Keep nerding

Based on 362 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.