Airports › Iowa
Airport · 12 months to July 2026
Waterloo Regional: delays and on-time record
Waterloo, Iowa
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live airport status.
Reporting carriers scheduled 656 domestic departures from Waterloo Regional (ALO), Waterloo, in the 12 months to July 2026: about 1.8 a day to 1 destination.
76.8% of those flights left the gate less than 15 minutes late, 0.7 points above the national departure figure of 76.1%. Flights arriving at ALO were on time 70.1% of the time, 5.9 points below the national arrival figure of 76.0%.
3.7% of scheduled departures were cancelled (national: 1.8%), and the average departure delay, counting early and on-time departures as zero, was 26.7 min.
Envoy Air is the largest reporting carrier at ALO with 85% of departures.
Of the delay minutes that carriers assigned to a BTS cause category for flights leaving ALO, air carrier 34%, late-arriving aircraft 34% and extreme weather 19%.
- On time 69.5%
- Arrived 15+ minutes late 26.5%
- Cancelled 3.7%
- Diverted 0.3%
As origin and as destination, against the nation
| Measure | Departures from ALO | Arrivals at ALO | All reported flights | ALO departures, previous 12 months |
|---|---|---|---|---|
| Departed on time (less than 15 min late) | 76.8% | 71.3% | 76.1% | — |
| Arrived on time | 69.5% | 70.1% | 76.0% | — |
| Cancelled | 3.7% | 4.1% | 1.8% | — |
| Diverted | 0.3% | 0.5% | 0.3% | — |
| Average departure delay (late minutes only) | 26.7 min | 20.8 min | 17.4 min | — |
| Arrival delay minutes per 100 flights | 2,898 | 2,106 | 1,684 | — |
| Scheduled flights | 656 | 656 | 7,043,858 | — |
12 months to July 2026. The first column follows flights that left ALO; the second follows flights that landed there.
Airlines at ALO
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| MQ Envoy Air | 556 | 85% | 71.6% | 16.8 min | 2.5% |
| OO SkyWest Airlines | 100 | 15% | 58.0% | 34.7 min | 10.0% |
Departures from ALO by reporting carrier, ordered by flights; on time means the flight reached its destination less than 15 minutes late. Green is at or above the airport's overall share of 69.5%. Carriers fly different routes at different hours, so the rows are not a like-for-like test.
Busiest routes from ALO
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| ALO–ORD | Waterloo to Chicago | 656 | 69.5% | 19.4 min | 3.7% |
Routes with at least 10 flights a month have their own page.
Month by month
By scheduled departure hour
Among hours with at least 30 departures, 6 am to 7 am had the highest on-time share (84.8% of 171 flights) and 3 pm to 4 pm the lowest (69.1% of 230).
Delay causes
Cancellations by reported reason (24 in the period): air carrier 0%, weather 88%, national aviation system 13%, security 0%.
Checkpoint volumes
TSA publishes daily checkpoint passenger counts for the country as a whole, not for ALO on its own. The national series through September 2026 is on the checkpoint volumes page.
Questions and answers
How often do flights leave ALO on time?
76.8% of the 656 scheduled domestic departures in the 12 months to July 2026 left less than 15 minutes late; the national figure was 76.1%. 3.7% were cancelled.
How often do flights arrive at ALO on time?
70.1% of 656 scheduled arrivals were on time by the BTS definition, against 76.0% nationally.
Which airline has the highest on-time share at ALO?
Only one reporting carrier has enough departures here to report a share.
What causes delays at ALO?
For departures from ALO that reached their destination 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 34%, late-arriving aircraft 34%, extreme weather 19%, national aviation system 14%, security 0%.
What time of day has the highest on-time share at ALO?
Departures scheduled from 6 am to 7 am local time left on time 84.8% of the time, the highest of any hour with enough flights to compare; 3 pm to 4 pm was lowest at 69.1%.
Is it getting better?
There are not enough flights in the previous 12 months for a year-on-year comparison.
Does this page show today's delays at ALO?
No. BTS publishes on-time records about two months after the month ends, so this page is a monthly history through July 2026. For live conditions use the FAA airport status service or your airline.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026; airport name from the BTS airport lookup table. US government works in the public domain. Domestic scheduled flights by reporting carriers only: international flights, charters and smaller carriers are not in the source. Totals and averages only; no individual flight or aircraft is identified. See the methodology; report processing errors through corrections.