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Flight Reliability

UA 5275 · United Airlines

Chicago → DLH (ORD–DLH)91% of its flights flew this route. The rest (ORD–MKE) are included in these numbers.

31
Bring Snacks
WanderNerd Reliability Score
57%
Arrive within 15 minutes
37 min
Average arrival delay
5.1%
Cancelled
7 min
Median arrival delay

Based on 356 historical flights. Data through May 2026.

What the data says

9 PM–12 AM has a slight edge.

Departures between 9 PM–12 AM arrived on time 63% of the time, against 57% between 6–9 PM.

Wednesdays have been rough.

UA 5275 arrived on time 68% of the time on Tuesdays and just 47% on Wednesdays. That gap is worth planning around.

Lagging the ORD–DLH route.

UA 5275 arrived on time 57% of the time, versus 66% across the ORD–DLH route.

Well behind the United Airlines network.

UA 5275 arrived on time 57% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon57%(49 flights)
  • Tue68%(50 flights)
  • Wed47%(51 flights)
  • Thu57%(46 flights)
  • Fri58%(48 flights)
  • Sat63%(43 flights)
  • Sun53%(51 flights)
On-time by departure window
  • 6–9 PM57%(295 flights)
  • 9 PM–12 AM63%(43 flights)
On-time trend by month
63%
May

Jun 50% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%28
July 202562%29
August 202560%30
September 202576%29
October 202570%27
November 202550%28
December 202541%29
January 202648%31
February 202668%28
March 202628%25
April 202671%24
May 202663%30
Departures on time
65%
Diverted
0%
Flights flown
338
Months covered
12

Same route, other flights

Keep nerding

Based on 356 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.