Route reliability record
ORD→GRR
Chicago to Grand Rapids
- Flights
- 4,034
- Period
- July 2025 to June 2026
- Distance
- 137 mi
- Carriers
- 6
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, 8 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 4,034 flights, of which Envoy Air flew 929 at 76.1% on time.
Envoy Air is the most reliable of the five carriers covered here at 76.1% on time across 929 flights.
Key figures
On time
70.0%
Arrivals under 15 minutes late, of 3,907 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
2.88%
National rate is 1.81%
Best carrier
Envoy
76.1% on time across 929 flights
These figures cover 4,034 flights between July 2025 and June 2026. Beyond the headline rate, 12.9% 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
Which airline is most reliable on ORD to GRR
The choice of carrier is not cosmetic here. Envoy Air arrives on time 76.1% of the time; American Airlines manages 58.7%. Sample sizes sit next to every figure, because a two-point gap across 531 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 929 | 76.1% | 63 min | 3.88% | B− |
| Republic Airways | 661 | 74.5% | 71 min | 3.03% | C− |
| SkyWest Airlines | 838 | 70.8% | 89 min | 3.46% | C− |
| United Airlines | 1,073 | 66.9% | 78 min | 1.21% | C |
| American Airlines | 531 | 58.7% | 85 min | 3.39% | D− |
| PSA Airlinesthin sample | 2 | 0.0% | 640 min | 0.00% | F+ |
Envoy Air cancels 3.9% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
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 25 points, against 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am240 flights87.0%
- 8am–11am820 flights75.3%
- 11am–2pm512 flights76.9%
- 2pm–5pm751 flights70.9%
- 5pm–8pm700 flights61.7%
- 8pm–5am1,011 flights62.9%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 61.7% on time, against 87.0% 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 8pm–5am window is the busiest, with 1,011 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 26 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 55.0% on time, against 80.5% 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. April was the busiest month here, with 443 flights.
Across the week, Thursday is the strongest day at 73.0% on time and Monday the weakest at 66.8%. 6 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 92,000 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.
- 45%Late-arriving aircraft
- 28%Carrier
- 18%National Airspace System
- 9%Extreme weather
- 0%Security
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 92,000 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 92,213 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 87.0% on time here.
Cancellations run at 2.88%, against 1.81% nationally. That is roughly one flight in 30 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 actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.9% 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.
At 137 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 5am–8am window matters as much as it does.
The return leg runs 68.3% on time across 4,038 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 4,034 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking this route
Put together: the delay figures matter less here than the 2.88% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 3,907 completed flights over 12 months sit behind that.
Common questions
ORD to GRR questions
How often is ORD to GRR delayed?
Roughly one flight in three arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 30.0% of the 4,034 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on ORD to GRR?
Envoy Air leads at 76.1% on time across 929 flights. American Airlines is at the other end on 58.7%, a gap of 17 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on ORD to GRR?
The 5am–8am departure window is the strongest at 87.0% on time. The 5pm–8pm window is the weakest at 61.7%, 25 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 GRR?
December is the weakest month at 55.0% on time, compared with 80.5% in September. Across the year that is 26 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
- GRR to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Envoy Air on-time record76.1%
- Republic Airways on-time record74.5%
- SkyWest Airlines on-time record70.8%
- Why the first flight of the morning is statistically safest
- What a cancellation rate actually tells you (and what it hides)
Direction matters. ORD to GRR and GRR to ORD are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.