Carrier route record
OOORD→AVP
SkyWest Airlines · Chicago to Avoca
- Flights
- 180
- Period
- July 2025 to June 2026
- Share of route
- 21%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on ORD to AVP draws a D. Roughly 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 180 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.6%, so SkyWest on ORD to AVP runs 14 points behind the country as a whole. Across a thousand flights that is about 145 extra late arrivals.
Key figures
On time
63.1%
Arrivals under 15 minutes late, of 176 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
1.11%
National rate is 1.81%
Whole route
72.9%
Every carrier on ORD to AVP, 842 flights
These figures cover 180 flights between July 2025 and June 2026. Beyond the headline rate, 16.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
SkyWest against every carrier on ORD to AVP
SkyWest flew 180 of the 842 flights on ORD to AVP, about 21% of it. Its 63.1% on time is 10 points worse than the route as a whole, which runs 72.9%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Envoy at 75.6% to SkyWest at 63.1%.
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 | 662 | 75.6% | 62 min | 3.32% | B− |
| SkyWest Airlines (this page)thin sample | 180 | 63.1% | 88 min | 1.11% | D |
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 31 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am70 flights72.1%
- 11am–2pm56 flights61.8%
- 2pm–5pm14 flights—
- 5pm–8pm40 flights41.0%
- 8pm–5am—
Scale runs 35% to 80%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 41.0% on time, against 72.1% for the 8am–11am 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 8am–11am window is the busiest, with 70 flights scheduled in it.
Across the year
SkyWest on ORD to AVP through the year
- Jul–Sep 20254 flights—
- Oct–Dec 202536 flights68.6%
- Jan–Mar 202656 flights64.8%
- Apr–Jun 202684 flights57.8%
Scale runs 50% to 75%. 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 63.1% on time across 180 flights.
SkyWest on ORD to AVP did not run the same all year. Its best quarter was Oct–Dec 2025 at 68.6% on time and its weakest Apr–Jun 2026 at 57.8%, a swing of 11 points on roughly 60 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Delay causes
Why SkyWest runs late on this route
One category carries most of the weight here. Carrier accounts for 53% of the 5,716 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 53%Carrier
- 23%Late-arriving aircraft
- 18%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,002 of the 5,716 delay minutes reported here. The split is drawn from 5,716 reported delay minutes.
Cancellations sit at 1.11% against a national 1.81%, which is ordinary. Diversions add another 1.11%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 632 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 72.8% on time across 180 flights, 10 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 10 points of difference.
One caution: this is a thin sample. 180 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 AVP
Put together: treat all of this as provisional. 180 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 63.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 176 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.