Carrier route record
YXORD→DAY
Republic Airways · Chicago to Dayton
- Flights
- 103
- Period
- July 2025 to June 2026
- Share of route
- 6%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.
Republic on ORD to DAY sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 103 flights. The strongest carrier on the route with a full sample, SkyWest Airlines, flew 469 at 60.7% on time.
The national on-time rate over the same period is 77.6%, so Republic on ORD to DAY runs 7 points behind the country as a whole. Across a thousand flights that is about 68 extra late arrivals.
Key figures
On time
70.8%
Arrivals under 15 minutes late, of 96 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
6.80%
National rate is 1.81%
Whole route
65.3%
Every carrier on ORD to DAY, 1,744 flights
These figures cover 103 flights between July 2025 and June 2026. Beyond the headline rate, 11.5% 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
Republic against every carrier on ORD to DAY
Republic flew 103 of the 1,744 flights on ORD to DAY, about 6% of it. Its 70.8% on time is 6 points better than the route as a whole, which runs 65.3%. Ranked by on-time rate it is number three of five carriers on the route, where the range runs from United at 80.9% to PSA at 60.2%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: half a point separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlinesthin sample | 69 | 80.9% | 80 min | 1.45% | B |
| Envoy Airthin sample | 357 | 76.9% | 65 min | 3.08% | B− |
| Republic Airways (this page)thin sample | 103 | 70.8% | 60 min | 6.80% | C− |
| SkyWest Airlines | 469 | 60.7% | 82 min | 6.18% | D− |
| PSA Airlines | 746 | 60.2% | 166 min | 5.36% | D− |
SkyWest Airlines cancels 6.2% 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
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 16 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–11am—
- 11am–2pm—
- 2pm–5pm53 flights78.0%
- 5pm–8pm6 flights—
- 8pm–5am44 flights62.5%
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 62.5% on time, against 78.0% for the 2pm–5pm 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 53 flights scheduled in it.
Across the year
Republic on ORD to DAY through the year
- Jul–Sep 202513 flights—
- Oct–Dec 202515 flights—
- Jan–Mar 20269 flights—
- Apr–Jun 202666 flights75.0%
Scale runs 65% to 80%. 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 70.8% on time across 103 flights.
Split by quarter, Republic on ORD to DAY logged 13 flights in Jul–Sep 2025, 15 flights in Oct–Dec 2025, 9 flights in Jan–Mar 2026 and 66 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 70.8% annual figure is the one to use.
Delay causes
Why Republic runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 1,678 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.
- 44%Late-arriving aircraft
- 30%National Airspace System
- 22%Carrier
- 4%Extreme weather
44% 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 1,678 reported delay minutes here, that single category outweighs weather by 11 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 1,678 reported delay minutes.
Cancellations run at 6.80%, against 1.81% nationally. That is about one flight in fifteen 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.5% 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.
At 240 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 2pm–5pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 89.2% on time across 103 flights, 18 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 18 points of difference.
One caution: this is a thin sample. 103 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 DAY
Put together: the delay figures matter less here than the 6.80% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 2pm–5pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 96 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to DAY, every carrier
- Republic on DAY to ORD, the return leg
- Envoy Air on ORD to DAY76.9%
- SkyWest Airlines on ORD to DAY60.7%
- PSA Airlines on ORD to DAY60.2%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.