Routes › Waterloo (ALO) › ALO to ORD
Route · 12 months to July 2026
Waterloo to Chicago: on-time record
Waterloo Regional to Chicago O'Hare International
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 flight status.
In the 12 months to July 2026, reporting carriers scheduled 656 flights from Waterloo (ALO) to Chicago (ORD), a distance of 234 miles. 69.5% of them arrived within 15 minutes of schedule.
That is 6.5 points below the national on-time share of 76.0% for the same period and level with the 69.5% recorded for all departures from ALO. Flights that did arrive were 19.4 min late on average, and 3.7% of scheduled flights were cancelled (national: 1.8%).
2 reporting carriers flew the route at least 60 times. Envoy Air had the highest on-time share at 71.6% of 556 flights; SkyWest Airlines had the lowest at 58.0% of 100.
By scheduled departure hour (local time at ALO), flights leaving from 5 am to 6 am had the highest on-time share, 78.8%; those leaving from 3 pm to 4 pm had the lowest, 54.3%.
Of the delay minutes that carriers assigned to a BTS cause category on this route, 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%
Airlines on the route compared
| 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% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | ALO to ORD | All departures from ALO | All arrivals at ORD | All reported flights |
|---|---|---|---|---|
| Arrived on time | 69.5% | 69.5% | 71.2% | 76.0% |
| Arrived 15+ minutes late | 26.5% | 26.5% | 25.4% | 21.9% |
| Cancelled | 3.7% | 3.7% | 2.9% | 1.8% |
| Diverted | 0.3% | 0.3% | 0.5% | 0.3% |
| Average arrival delay | 19.4 min | 19.4 min | 15.4 min | 8.1 min |
| Delay minutes per 100 flights | 2,898 | 2,898 | 2,373 | 1,684 |
| Scheduled flights | 656 | 656 | 359,867 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, ORD to ALO, recorded 70.1% on time across 656 flights in the same period.
Month by month
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| Jan | 54 | 61.1% | 0.0% | 39.4 min | 1 |
| Feb | 48 | 77.1% | 0.0% | 24.1 min | 1 |
| Mar | 53 | 64.2% | 5.7% | 42.4 min | 1 |
| Apr | 59 | 76.3% | 5.1% | 9.5 min | 1 |
| May | 59 | 86.4% | 0.0% | 0.3 min | 1 |
| Jun | 102 | 67.6% | 5.9% | 25.1 min | 2 |
| Jul | 115 | 59.1% | 4.3% | 28.2 min | 2 |
| Aug | 55 | 69.1% | 0.0% | 6.5 min | 1 |
| Sep | 52 | 80.8% | 0.0% | 5.1 min | 1 |
| Oct | 61 | 70.5% | 0.0% | 8.7 min | 1 |
| Nov | 54 | 74.1% | 5.6% | 17.6 min | 1 |
| Dec | 56 | 53.6% | 8.9% | 25.1 min | 1 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Questions and answers
How often are flights from Waterloo to Chicago on time?
69.5% of the 656 flights scheduled from ALO to ORD in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from ALO to ORD?
Among reporting carriers with at least 60 flights on the route, Envoy Air had the highest on-time share (71.6%), followed by SkyWest Airlines (58.0%). Differences of a point or two on a few hundred flights are small.
What causes delays between Waterloo and Chicago?
For flights that arrived 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%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from ALO?
Flights scheduled to leave ALO from 5 am to 6 am arrived on time 78.8% of the time, the highest of any hour with enough flights to compare. The lowest was 3 pm to 4 pm at 54.3%. Delays tend to build through the day as late aircraft carry over to later flights.
Is it getting better?
The route does not have enough flights in the previous 12 months for a year-on-year comparison. The monthly chart on this page shows the months that are available.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.