Carrier route record
OHDAY→ORD
PSA Airlines · Dayton to Chicago
- Flights
- 745
- Period
- July 2025 to June 2026
- Share of route
- 43%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with PSA Airlines.
PSA on DAY to ORD carries a cancellation problem, not just a delay problem: 4.3% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, about seven flights in ten arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 745 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.6%, so PSA on DAY to ORD runs 5 points behind the country as a whole. Across a thousand flights that is about 52 extra late arrivals.
Key figures
On time
72.4%
Arrivals under 15 minutes late, of 710 completed flights
Avg delay
110 min
Across delayed arrivals only, not all flights
Cancelled
4.30%
National rate is 1.81%
Whole route
71.9%
Every carrier on DAY to ORD, 1,741 flights
These figures cover 745 flights between July 2025 and June 2026. Beyond the headline rate, 14.1% 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
PSA against every carrier on DAY to ORD
PSA flew 745 of the 1,741 flights on DAY to ORD, about 43% of it. Its 72.4% on time is about level with the route as a whole at 71.9%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Republic at 89.2% to SkyWest at 60.5%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 103 | 89.2% | 109 min | 9.71% | A− |
| United Airlinesthin sample | 69 | 80.9% | 44 min | 1.45% | B |
| Envoy Airthin sample | 354 | 78.8% | 77 min | 2.82% | B |
| PSA Airlines (this page) | 745 | 72.4% | 110 min | 4.30% | C− |
| SkyWest Airlines | 470 | 60.5% | 102 min | 6.81% | D− |
Departure window
When PSA runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 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–11am301 flights80.6%
- 11am–2pm306 flights68.2%
- 2pm–5pm36 flights64.7%
- 5pm–8pm102 flights63.5%
- 8pm–5am—
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 63.5% on time, against 80.6% for the 8am–11am 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 11am–2pm window is the busiest, with 306 flights scheduled in it.
Across the year
PSA on DAY to ORD through the year
July is the worst month at 62.8% on time, 28 points below October, the best at 90.9%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. August was the busiest month here, with 93 flights.
Across the week, Saturday is the strongest day at 74.4% on time and Thursday the weakest at 69.9%. 5 points is a smaller lever than departure hour, but it is free.
Delay causes
Why PSA runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 55% of the 22,000 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.
- 55%Late-arriving aircraft
- 23%Carrier
- 17%National Airspace System
- 4%Extreme weather
55% 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 22,000 reported delay minutes here, that single category outweighs weather by 14 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 21,620 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 80.6% on time here.
Cancellations run at 4.30%, against 1.81% nationally. That is about one flight in 25 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. 14.1% 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 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 60.2% on time across 746 flights, 12 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 12 points of difference.
One caution: this is a thin sample. 745 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 PSA on DAY to ORD
Put together: the delay figures matter less here than the 4.30% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 710 completed flights over 12 months sit behind that.
Related
Where to go next
- DAY to ORD, every carrier
- PSA on ORD to DAY, the return leg
- Republic Airways on DAY to ORD89.2%
- Envoy Air on DAY to ORD78.8%
- SkyWest Airlines on DAY to ORD60.5%
- PSA Airlines 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.