Route reliability record
ORD→AVP
Chicago to Avoca
- Flights
- 846
- Period
- September 2025 to August 2026
- Distance
- 632 mi
- Carriers
- 2
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 846 ORD to AVP flights, with a median arrival 4 minutes early.
Best time to fly ORD to AVP: a 8pm–5am departure, ideally on a Saturday. Flights in that window arrived on time 77.0% of the time and Saturday flights 76.7%, against 72.3% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 5 points behind the country as a whole. Across a thousand flights that is about 50 extra late arrivals.
Key figures
On time
72.3%
Arrivals under 15 minutes late, of 824 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
2.36%
National rate is 1.89%
Best carrier
Envoy
74.8% on time across 666 flights
These figures cover 846 flights between September 2025 and August 2026. Beyond the headline rate, 9.8% 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 ORD to AVP
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 | 74.8% | 65 min | 2.70% | C |
| SkyWest Airlinesthin sample | 180 | 63.1% | 88 min | 1.11% | D |
Flight by flight
Flights on ORD to AVP
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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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 15 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am79 flights72.7%
- 11am–2pm117 flights69.8%
- 2pm–5pm253 flights75.3%
- 5pm–8pm159 flights62.3%
- 8pm–5am238 flights77.0%
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 62.3% on time, against 77.0% for the 8pm–5am 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 2pm–5pm window is the busiest, with 253 flights scheduled in it.
Explore
Filter ORD to AVP 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 ORD to AVP, the best departure window is 8pm–5am at 77.0% on time and the worst is 5pm–8pm at 62.3%, a wide gap of 14.7 points. All US flights leaving 8pm–5am ran 70.1%.
- 5–8am—
- 8–11am72.7%
- 11am–2pm69.8%
- 2–5pm75.3%
- 5–8pm62.3%
- 8pm–5am77.0%
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 32 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 55.8% on time, against 87.7% in September. 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 119 flights.
Across the week, Saturday is the strongest day at 76.7% on time and Sunday the weakest at 66.1%, a spread of 11 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 43% of the 16,000 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 29%Carrier
- 15%National Airspace System
- 12%Extreme weather
Extreme weather accounts for 12% 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 2.0 times the usual weather exposure. The split is drawn from 16,242 reported delay minutes.
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 16,000 reported delay minutes here, that single category outweighs weather by 4 to one.
Cancellations sit at 2.36% against a national 1.89%, which is ordinary. Diversions add another 0.24%.
Connections and stage length
What a delay here actually costs
9.8% 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 76.4% on time across 846 flights, 4 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 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 AVP 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 72.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 824 completed flights over 12 months sit behind that.
Common questions
ORD to AVP questions
How often is ORD to AVP delayed?
Roughly 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 27.7% of the 846 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is ORD to AVP compared with the rest of the country?
72.3% of flights arrive on time here against a national 77.3%, a difference of 5 points against it. That is worth a C on this site's grading scale.
What time of day has the fewest delays on ORD to AVP?
The 8pm–5am departure window is the strongest at 77.0% on time. The 5pm–8pm window is the weakest at 62.3%, 15 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 ORD to AVP?
December is the weakest month at 55.8% on time, compared with 87.7% in September. Across the year that is 32 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
- AVP to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Envoy Air on ORD to AVP74.8%
- SkyWest Airlines on ORD to AVP63.1%
- ORD to LGA, a related route66.6%
- CLT to AVP, a related route79.4%
- ORD to BOS, a related route66.6%
- Envoy Air on-time record74.8%
- SkyWest Airlines on-time record63.1%
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Direction matters. ORD to AVP and AVP to ORD 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.