Carrier route record
OOORD→AZO
SkyWest Airlines · Chicago to Kalamazoo
- Flights
- 225
- Period
- September 2025 to August 2026
- Share of route
- 24%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on ORD to AZO draws a D−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 225 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so SkyWest on ORD to AZO runs 12 points behind the country as a whole. Across a thousand flights that is about 124 extra late arrivals.
Key figures
On time
64.9%
Arrivals under 15 minutes late, of 208 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
6.22%
National rate is 1.89%
Whole route
73.8%
Every carrier on ORD to AZO, 941 flights
These figures cover 225 flights between September 2025 and August 2026. Beyond the headline rate, 13.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on ORD to AZO
SkyWest flew 225 of the 941 flights on ORD to AZO, about 24% of it. Its 64.9% on time is 9 points worse than the route as a whole, which runs 73.8%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Envoy at 76.6% to SkyWest at 64.9%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 716 | 76.6% | 66 min | 4.33% | B− |
| SkyWest Airlines (this page)thin sample | 225 | 64.9% | 89 min | 6.22% | D− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am18 flights—
- 11am–2pm103 flights69.7%
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am104 flights55.4%
Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 55.4% on time, against 69.7% for the 11am–2pm slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8pm–5am window is the busiest, with 104 flights scheduled in it.
Across the year
SkyWest on ORD to AZO through the year
- Oct–Dec 20254 flights—
- Jan–Mar 20261 flights—
- Apr–Jun 202696 flights66.7%
- Jul–Sep 2026124 flights63.7%
Scale runs 55% to 70%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 64.9% on time across 225 flights.
Split by quarter, SkyWest on ORD to AZO logged 4 flights in Oct–Dec 2025, 1 flights in Jan–Mar 2026, 96 flights in Apr–Jun 2026 and 124 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 64.9% annual figure is the one to use.
Across the week, Tuesday is the strongest day at 75.0% on time and Sunday the weakest at 43.3%, a spread of 32 points.
Arrival by arrival
How late SkyWest on ORD to AZO runs when it is late
SkyWest on ORD to AZO often beats the schedule: 55 of 208 completed flights, 26%, arrived 15 minutes or more early. The 73 late arrivals split 21 under half an hour, 25 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early55 flights26.4%
- Within 15 min80 flights38.5%
- 15–29 min late21 flights10.1%
- 30–59 min late25 flights12.0%
- 1–2 hours late16 flights7.7%
- 2+ hours late11 flights5.3%
Scale runs 0% to 100%.
Share of 208 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 64 departures that left 15 minutes late or more, only 3 made it up before arrival. In the other direction, 12 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at AZO.
The worst days
Worst days for SkyWest on ORD to AZO
The latest arrival of the period was on 24 July 2026, 13 hours 33 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 July 2026 | 13 hours 33 minutes | Late-arriving aircraft |
| 1 February 2026 | 10 hours 24 minutes | Extreme weather |
| 6 June 2026 | 9 hours 29 minutes | Late-arriving aircraft |
| 9 August 2026 | 6 hours 18 minutes | Late-arriving aircraft |
| 13 August 2026 | 4 hours 2 minutes | Extreme weather |
Delay causes
Why SkyWest runs late on this route
Late-arriving aircraft accounts for 51% of the 6,511 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 25%Extreme weather
- 13%National Airspace System
- 11%Carrier
Extreme weather accounts for 25% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 4.1 times the usual weather exposure. The split is drawn from 6,511 reported delay minutes.
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,511 reported delay minutes here, that single category outweighs weather by 2 to one.
Cancellations run at 6.22%, against 1.89% nationally. That is about one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
13.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 122 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 73.7% on time across 224 flights, 9 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 9 points of difference.
One caution: this is a thin sample. 225 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking SkyWest on ORD to AZO
Put together: the delay figures matter less here than the 6.22% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 208 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.