FlightRecord

Waterloo (ALO) to Chicago (ORD): On-Time Performance

Data through May 2026

The calendar drives reliability on ALO–ORD. May 2026 flights landed on schedule 86% of the time, but December 2025 dropped to 59% — a gap of 28 points. Across the full period the route averages 72% on-time against a national 78%.

On-time
72%
arrived <15 min late
Avg delay
28 min
completed flights
Cancelled
2.3%
Flights/day
1.8
last 12 months
Duration
1h 27m
scheduled
Distance
234 mi

Monthly on-time trend

Monthly on-time percentage for ALO to ORD flights50%75%100%June 2025: 75% on-time (51 flights)75Jun 2025July 2025: 60% on-time (61 flights)60August 2025: 69% on-time (55 flights)69September 2025: 81% on-time (52 flights)81Sep 2025October 2025: 71% on-time (61 flights)71November 2025: 78% on-time (54 flights)78December 2025: 59% on-time (56 flights)59Dec 2025January 2026: 61% on-time (54 flights)61February 2026: 77% on-time (48 flights)77March 2026: 68% on-time (53 flights)68Mar 2026April 2026: 80% on-time (59 flights)80May 2026: 86% on-time (59 flights)86

Best time to fly from ALO to ORD

Aim for departures around 5 a.m. (88% on-time); avoid 3 p.m. departures (55%).

On-time percentage by scheduled departure hour, ALO to ORD5 a.m.: 88% on-time (128 flights)56 a.m.: 79% on-time (226 flights)62 p.m.: 82% on-time (45 flights)143 p.m.: 55% on-time (245 flights)15scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday67%27 min
Tuesday81%17 min
Wednesday73%28 min
Thursday68%29 min
Friday70%31 min
Saturdaybest82%26 min
Sunday69%37 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft33%
  • Airline operations24%
  • National airspace system17%
  • Weather26%

Frequently asked questions

How often are flights from ALO to ORD delayed?
28% of ALO–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 28 minutes.
What is the best time of day to fly from ALO to ORD?
Departures around 5 a.m. have the best record (88% on-time), while departures around 3 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from ALO to ORD?
The scheduled ALO–ORD flight time averages 1h 27m over 234 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
How often are ALO to ORD flights cancelled?
2.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
What is the worst month to fly from ALO to ORD?
December 2025 was the roughest month in this dataset, with only 59% of arrivals on time. The best was May 2026 at 86%. If your dates are flexible, that 28-point gap is worth planning around.

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Based on 663 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.