Best Time to Fly ORD to ALO: On-Time Stats by Hour & Airline
Chicago O'Hare International → Waterloo Regional
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.5% of Chicago (ORD) to Waterloo (ALO) flights arrived on time (656 scheduled flights). That is 4.1 points below the national average of 77.6%.
Among 2 airlines, Envoy Air led with 74.5% on time and SkyWest Airlines was last with 67.4%.
Over 24 months, Saturday was the most reliable day (85% on time) and December the worst month (59%).
The cancellation rate was 4.1% (US average 1.8%).
ORD to ALO on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Air | 74.5% | 74 min | 2.7% | 555 |
| SkyWest Airlines | 67.4% | 110 min | 11.9% | 101 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to ALO
On-time arrival % by scheduled departure hour (local time), 769 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12pm–1pm | 81.2% | 0.0% | 48 |
| 1pm–2pm | 76.2% | 2.1% | 290 |
| 3pm–4pm | Limited data | 17 | |
| 5pm–6pm | Limited data | 5 | |
| 6pm–7pm | Limited data | 15 | |
| 7pm–8pm | Limited data | 1 | |
| 8pm–9pm | Limited data | 26 | |
| 9pm–10pm | 60.5% | 0.0% | 38 |
| 10pm–11pm | 67.6% | 5.2% | 269 |
| 11pm–12am | 61.5% | 13.3% | 60 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to ALO
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 26 | ||
| Summer peak (Jun 15 - Aug 15) | 67.7% | -7.0 pts | 3.5% | 202 |
| All other days | 74.7% | — | 2.8% | 529 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).