Best Time to Fly ALO to ORD: On-Time Stats by Hour & Airline
Waterloo Regional → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 72.4% of Waterloo (ALO) to Chicago (ORD) flights arrived on time (656 scheduled flights). That is 5.2 points below the national average of 77.6%.
Among 2 airlines, Envoy Air led with 73.7% on time and SkyWest Airlines was last with 64.4%.
Over 24 months, Saturday was the most reliable day (82% on time) and December the worst month (59%).
The cancellation rate was 3.7% (US average 1.8%).
ALO to ORD 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 | 73.7% | 104 min | 2.5% | 556 |
| SkyWest Airlines | 64.4% | 117 min | 10.0% | 100 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ALO to ORD
On-time arrival % by scheduled departure hour (local time), 768 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 83.2% | 5.3% | 189 |
| 6am–7am | 79.4% | 1.3% | 226 |
| 7am–8am | Limited data | 2 | |
| 8am–9am | Limited data | 2 | |
| 9am–10am | Limited data | 2 | |
| 2pm–3pm | 79.2% | 2.0% | 49 |
| 3pm–4pm | 55.9% | 3.9% | 285 |
| 4pm–5pm | Limited data | 13 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ALO to ORD
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) | 66.3% | -7.2 pts | 3.0% | 202 |
| All other days | 73.5% | — | 2.5% | 528 |
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).