Best time to fly out of Waterloo (ALO)
Waterloo did not fly enough departures in this window to split the day into time bands. Not enough flights to say. A percentage needs at least 100 flights behind it before it is worth printing; anything thinner is noise wearing a decimal point. These are historical odds, not forecasts. The records say what happened on this schedule over three years; they know nothing about tomorrow’s thunderstorm.
Data through June 2026 · Bureau of Transportation Statistics
On-time rate by hour and day
On this page, “on time” means a departure that pushed back less than 15 minutes behind its scheduled time — the Bureau of Transportation Statistics definition, and the one airlines are held to.
| Departure time | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| Before 6am | – | – | – | – | – | – | – |
| 6–8am | – | – | – | – | – | – | – |
| 8–10am | – | – | – | – | – | – | – |
| 10am–12pm | – | – | – | – | – | – | – |
| 12–2pm | – | – | – | – | – | – | – |
| 2–4pm | – | – | – | – | – | – | – |
| 4–6pm | – | – | – | – | – | – | – |
| 6–8pm | – | – | – | – | – | – | – |
| 8–10pm | – | – | – | – | – | – | – |
| 10pm–12am | – | – | – | – | – | – | – |
Not enough flights to say — fewer than 100 in this window.
The year at ALO
Month by month, Waterloo is too thin to read. Not enough flights to say — fewer than 100 in this window.
| Month | Share departures that left on time | Flights |
|---|---|---|
| January | Not enough flights to say | 54 |
| February | Not enough flights to say | 48 |
| March | Not enough flights to say | 53 |
| April | Not enough flights to say | 59 |
| May | Not enough flights to say | 59 |
| June | Not enough flights to say | 102 |
| July | Not enough flights to say | 61 |
| August | Not enough flights to say | 55 |
| September | Not enough flights to say | 52 |
| October | Not enough flights to say | 61 |
| November | Not enough flights to say | 54 |
| December | Not enough flights to say | 56 |
Airlines at ALO
Every airline with at least 100 departures from ALO, busiest first. These are that airline’s departures from this airport only — its record across the country sits on its own page.
| Airline | Left on time | Typical delay | Cancelled | Departures |
|---|---|---|---|---|
| Envoy Air | 79.9% | 119 min | 2.2% | 668 |
What delays out of ALO were put down to
Airlines file a reason with every arrival running 15 minutes late or more. Across 193 flights that departed ALO and ran 15 minutes late or more, the delay minutes break down with 33.7% put down to late-arriving aircraft and 26.2% to airline operations.
- Late-arriving aircraft 33.7%
- Airline operations 26.2%
- Air traffic & airport volume 15.7%
- Severe weather 24.3%
- Security 0.1%
Late-arriving aircraft is the knock-on category: the plane came in late, so it went out late again. It is why a 7am problem in Newark is still a problem in Denver at dinnertime, and why it is usually the biggest slice on the bar.
If you are connecting through ALO
Of 715 scheduled arrivals into ALO, 69.7% reached the gate less than 15 minutes behind schedule. Of the 187 arrivals that ran late, 46% were no more than 45 minutes behind — which is the difference between a tight connection and a new boarding pass.
Work out a specific layover — pick the airport and the minutes you have, and the tool reads the same arrival records back as a share.
Busiest routes out of ALO
Ranked by flights, with the share that arrived on time at the far end. Where a route carries enough flights for a page of its own the chip goes there; otherwise it goes to the destination airport.
- ORD 72.1% on time · 714 flights
ALO in one number
Waterloo (ALO)
Rank 340 of 363 US airports by departures. Steadiest stretch of the day: —. Hardest month: —.
Questions about ALO
- How often are flights cancelled at ALO?
- 2.9% of scheduled departures were cancelled over July 2023 through June 2026. Cancellations are counted against everything scheduled, not against everything that flew — a rate that looks small still adds up to real people in a rebooking line.