Waterloo Regional (ALO) Delays and On-Time Departures
Waterloo, IA · ranked 197th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
79.8% of the 656 flights scheduled to depart Waterloo (ALO) in the last 12 months left on time, 2.3 points above the US average of 77.4%.
That ranks 197th of 333 US airports tracked on this site, with 3.7% of departures cancelled.
Envoy Air was the most punctual airline here, with 81.0% of departures on time.
October has been the best month (90% on time) and Monday the weakest day of the week (76%).
Best time of day to fly out of Waterloo (ALO)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 83.8% | 5.3% | 189 |
| 6am–7am | 86.1% | 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 | 70.4% | 3.9% | 285 |
| 4pm–5pm | Limited data | 13 | |
Airlines at ALO ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| Envoy Air | 81.0% | 73.7% | 2.5% | 556 |
| SkyWest Airlines | 72.2% | 64.4% | 10.0% | 100 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of ALO
On-time departures by day, 24 months.
Best month to fly out of ALO
On-time departures by month, 24 months.
Holiday travel at Waterloo (ALO)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | 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) | 76.0% | -4.2 pts | 3.0% | 202 |
| All other days | 80.2% | — | 2.5% | 528 |
Monthly on-time departure trend at ALO
On-time departure % each month, with the 12-month US average for reference.
Routes from Waterloo (ALO)
Every route from ALO with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| ALO → Chicago (ORD) | 72.4% | 3.7% | 656 |