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Flight Reliability

UA 5138 · United Airlines

Chicago → MGW (ORD–MGW)84% of its flights flew this route. The rest (DEN–RKS, DDC–DEN) are included in these numbers.

16
Bring Snacks
WanderNerd Reliability Score
61%
Arrive within 15 minutes
41 min
Average arrival delay
6.8%
Cancelled
2 min
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 5138 departing between 9 AM–12 PM arrived on time 71% of the time, versus 24% between 6–9 PM.

Friday is doing you no favors.

UA 5138 arrived on time 68% of the time on Saturdays. On Fridays: 54%.

A bit behind the ORD–MGW route.

UA 5138 arrived on time 61% of the time, versus 65% across the ORD–MGW route.

Well behind the United Airlines network.

UA 5138 arrived on time 61% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon61%(49 flights)
  • Tue67%(43 flights)
  • Wed65%(49 flights)
  • Thu56%(50 flights)
  • Fri54%(50 flights)
  • Sat68%(38 flights)
  • Sun56%(52 flights)
On-time by departure window
  • 9 AM–12 PM71%(52 flights)
  • 3–6 PM68%(100 flights)
  • 6–9 PM24%(17 flights)
  • 9 PM–12 AM57%(162 flights)
On-time trend by month
71%
May

Jun 33% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202533%46
July 202554%28
August 202565%31
September 202561%28
October 202561%31
November 202588%24
December 202556%25
January 202648%21
February 202671%28
March 202677%30
April 202668%22
May 202671%17
Departures on time
65%
Diverted
2.5%
Flights flown
331
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.