Route reliability record
AVP→ORD
Avoca to Chicago
- Flights
- 846
- Period
- September 2025 to August 2026
- Distance
- 632 mi
- Carriers
- 2
This route lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 846 AVP to ORD flights, with a median arrival 9 minutes early.
Best time to fly AVP to ORD: a 5am–8am departure, ideally on a Saturday. Flights in that window arrived on time 86.7% of the time and Saturday flights 86.6%, against 76.4% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.4%
Arrivals under 15 minutes late, of 823 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
2.25%
National rate is 1.89%
Best carrier
Envoy
77.4% on time across 666 flights
These figures cover 846 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on AVP to ORD
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 | 666 | 77.4% | 70 min | 2.10% | B |
| SkyWest Airlinesthin sample | 180 | 72.8% | 150 min | 2.78% | C |
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Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against half a point between the best and worst carrier.
- 5am–8am404 flights86.7%
- 8am–11am1 flights—
- 11am–2pm4 flights—
- 2pm–5pm192 flights71.4%
- 5pm–8pm245 flights62.8%
- 8pm–5am—
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 62.8% on time, against 86.7% for the 5am–8am 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 5am–8am window is the busiest, with 404 flights scheduled in it.
Explore
Filter AVP to ORD by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On AVP to ORD, the best departure window is 5am–8am at 86.7% on time and the worst is 5pm–8pm at 62.8%, a wide gap of 23.9 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am86.7%
- 8–11am—
- 11am–2pm—
- 2–5pm71.4%
- 5–8pm62.8%
- 8pm–5am—
best all US flightsScale 55% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 29 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 57.7% on time, against 87.0% in February. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. May was the busiest month here, with 120 flights.
Across the week, Saturday is the strongest day at 86.6% on time and Sunday the weakest at 69.7%, a spread of 17 points.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 17,000 reported delay minutes.
- 41%Late-arriving aircraft
- 30%National Airspace System
- 22%Carrier
- 8%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 17,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 17,420 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.7% on time here.
Cancellations sit at 2.25% against a national 1.89%, which is ordinary. Diversions add another 0.47%.
Connections and stage length
What a delay here actually costs
10.4% 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.
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.
The return leg is a different operation and performs like one: it runs 72.3% on time across 846 flights, 4 points below 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 4 points of difference.
One caution: this is a thin sample. 846 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.
Work out the risk of missing a connection in ORD after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 846 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 76.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 823 completed flights over 12 months sit behind that.
Common questions
AVP to ORD questions
How often is AVP to ORD delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 23.6% of the 846 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is AVP to ORD compared with the rest of the country?
76.4% of flights arrive on time here against a national 77.3%, a difference of about a point against it. That is worth a B on this site's grading scale.
What time of day has the fewest delays on AVP to ORD?
The 5am–8am departure window is the strongest at 86.7% on time. The 5pm–8pm window is the weakest at 62.8%, 24 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on AVP to ORD?
December is the weakest month at 57.7% on time, compared with 87.0% in February. Across the year that is 29 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- ORD to AVP — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Envoy Air on AVP to ORD77.4%
- SkyWest Airlines on AVP to ORD72.8%
- AVP to CLT, a related route85.7%
- LGA to ORD, a related route66.7%
- BOS to ORD, a related route71.9%
- Envoy Air on-time record77.4%
- SkyWest Airlines on-time record72.8%
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Direction matters. AVP to ORD and ORD to AVP are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.