Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 4636 · United Airlines

Chicago → SBN (ORD–SBN)91% of its flights flew this route. The rest (ORD–ABE, OMA–ORD) are included in these numbers.

31
Bring Snacks
WanderNerd Reliability Score
56%
Arrive within 15 minutes
36 min
Average arrival delay
5.0%
Cancelled
10 min
Median arrival delay

Based on 362 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 4636 departing between 6–9 AM arrived on time 84% of the time, versus 52% between 3–6 PM.

Saturdays have been rough.

UA 4636 arrived on time 67% of the time on Mondays and just 48% on Saturdays. That gap is worth planning around.

Lagging the ORD–SBN route.

UA 4636 arrived on time 56% of the time, versus 63% across the ORD–SBN route.

Well behind the United Airlines network.

UA 4636 arrived on time 56% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon67%(48 flights)
  • Tue58%(52 flights)
  • Wed58%(50 flights)
  • Thu57%(49 flights)
  • Fri52%(48 flights)
  • Sat48%(48 flights)
  • Sun53%(49 flights)
On-time by departure window
  • 6–9 AM84%(31 flights)
  • 3–6 PM52%(289 flights)
  • 6–9 PM75%(24 flights)
On-time trend by month
47%
May

Jun 63% → May 47% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202543%30
August 202566%29
September 202577%30
October 202587%31
November 202557%23
December 202539%31
January 202648%29
February 202629%28
March 202668%25
April 202650%28
May 202647%30
Departures on time
68%
Diverted
0%
Flights flown
344
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.