Carrier route record
YXORD→GRR
Republic Airways · Chicago to Grand Rapids
- Flights
- 665
- Period
- September 2025 to August 2026
- Share of route
- 16%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on ORD to GRR sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 665 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 967 at 75.2% on time.
Envoy Air is the most reliable of the four carriers covered here at 75.2% on time across 967 flights.
Key figures
On time
71.7%
Arrivals under 15 minutes late, of 640 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
3.46%
National rate is 1.89%
Whole route
69.5%
Every carrier on ORD to GRR, 4,077 flights
These figures cover 665 flights between September 2025 and August 2026. Beyond the headline rate, 11.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Republic against every carrier on ORD to GRR
Republic flew 665 of the 4,077 flights on ORD to GRR, about 16% of it. Its 71.7% on time is 2 points better than the route as a whole, which runs 69.5%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from Envoy at 75.2% to PSA at 0.0%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Envoy Air arrives on time 75.2% of the time; American Airlines manages 58.7%. Sample sizes sit next to every figure, because a two-point gap across 478 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 967 | 75.2% | 64 min | 3.93% | B− |
| SkyWest Airlines | 881 | 71.8% | 86 min | 4.09% | C− |
| Republic Airways (this page) | 665 | 71.7% | 70 min | 3.46% | C− |
| United Airlines | 1,084 | 66.2% | 77 min | 1.01% | C |
| American Airlines | 478 | 58.7% | 87 min | 3.77% | D− |
| PSA Airlinesthin sample | 2 | 0.0% | 640 min | 0.00% | F+ |
SkyWest Airlines cancels 4.1% 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.
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Departure window
When Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against 17 points between the best and worst carrier.
- 5am–8am—
- 8am–11am297 flights76.8%
- 11am–2pm38 flights82.9%
- 2pm–5pm77 flights80.0%
- 5pm–8pm127 flights61.9%
- 8pm–5am126 flights60.0%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 60.0% on time, against 82.9% 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 8am–11am window is the busiest, with 297 flights scheduled in it.
Across the year
Republic on ORD to GRR through the year
December is the weak month at 48.9% on time, against 94.2% 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. December was the busiest month here, with 96 flights.
Across the week, Thursday is the strongest day at 83.1% on time and Wednesday the weakest at 65.2%, a spread of 18 points.
Arrival by arrival
How late Republic on ORD to GRR runs when it is late
Republic on ORD to GRR often beats the schedule: 176 of 640 completed flights, 28%, arrived 15 minutes or more early. The 181 late arrivals split 59 under half an hour, 51 between 30 and 60 minutes, and 71 an hour or more.
- 15+ min early176 flights27.5%
- Within 15 min283 flights44.2%
- 15–29 min late59 flights9.2%
- 30–59 min late51 flights8.0%
- 1–2 hours late48 flights7.5%
- 2+ hours late23 flights3.6%
Scale runs 0% to 100%.
Share of 640 completed flights by arrival against schedule.
18 of 140 late departures made up the time and arrived on time, 13% of them. In the other direction, 59 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 GRR.
The worst days
Worst days for Republic on ORD to GRR
The latest arrival of the period was on 11 March 2026, 9 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 March 2026 | 9 hours 47 minutes | Carrier |
| 6 March 2026 | 6 hours 39 minutes | Late-arriving aircraft |
| 31 March 2026 | 5 hours 51 minutes | Late-arriving aircraft |
| 2 December 2025 | 5 hours 29 minutes | Late-arriving aircraft |
| 9 November 2025 | 4 hours 51 minutes | Carrier |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 47% of the 13,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 27%National Airspace System
- 23%Carrier
- 3%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 13,000 reported delay minutes here, that single category outweighs weather by 14 to one. The split is drawn from 12,584 reported delay minutes.
Cancellations run at 3.46%, against 1.89% nationally. That is about 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 costs
11.1% 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 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 11am–2pm window matters as much as it does.
The return leg runs 72.5% on time across 666 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 665 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 Republic on ORD to GRR
Put together: the delay figures matter less here than the 3.46% cancellation rate. A late arrival costs you a little over an hour; 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. 640 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to GRR, every carrier
- Republic on GRR to ORD, the return leg
- Envoy Air on ORD to GRR75.2%
- SkyWest Airlines on ORD to GRR71.8%
- United Airlines on ORD to GRR66.2%
- American Airlines on ORD to GRR58.7%
- Republic Airways network-wide record
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.