Carrier route record
OHORD→DAY
PSA Airlines · Chicago to Dayton
- Flights
- 746
- 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 ORD to DAY carries a cancellation problem, not just a delay problem: 5.4% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, a little over half of flights arrive on time, worth a D− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 746 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.6%, so PSA on ORD to DAY runs 17 points behind the country as a whole. Across a thousand flights that is about 174 extra late arrivals.
Key figures
On time
60.2%
Arrivals under 15 minutes late, of 706 completed flights
Avg delay
166 min
Across delayed arrivals only, not all flights
Cancelled
5.36%
National rate is 1.81%
Whole route
65.3%
Every carrier on ORD to DAY, 1,744 flights
These figures cover 746 flights between July 2025 and June 2026. Beyond the headline rate, 23.4% 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 ORD to DAY
PSA flew 746 of the 1,744 flights on ORD to DAY, about 43% of it. Its 60.2% on time is 5 points worse than the route as a whole, which runs 65.3%. Ranked by on-time rate it is last of five carriers on the route, where the range runs from United at 80.9% to PSA at 60.2%. 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 |
|---|---|---|---|---|---|
| United Airlinesthin sample | 69 | 80.9% | 80 min | 1.45% | B |
| Envoy Airthin sample | 357 | 76.9% | 65 min | 3.08% | B− |
| Republic Airwaysthin sample | 103 | 70.8% | 60 min | 6.80% | C− |
| SkyWest Airlines | 469 | 60.7% | 82 min | 6.18% | D− |
| PSA Airlines (this page) | 746 | 60.2% | 166 min | 5.36% | 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–11am305 flights64.5%
- 11am–2pm37 flights61.8%
- 2pm–5pm106 flights67.0%
- 5pm–8pm218 flights53.7%
- 8pm–5am80 flights50.0%
Scale runs 40% to 70%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 50.0% on time, against 67.0% 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 8am–11am window is the busiest, with 305 flights scheduled in it.
Across the year
PSA on ORD to DAY through the year
January is the weak month at 52.4% on time, against 67.9% 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. August was the busiest month here, with 93 flights.
Across the week, Saturday is the strongest day at 65.6% on time and Wednesday the weakest at 57.1%. 8 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 65% of the 47,000 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.
- 65%Late-arriving aircraft
- 16%Carrier
- 12%Extreme weather
- 7%National Airspace System
- 0%Security
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 46,524 reported delay minutes.
65% 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 47,000 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.
Cancellations run at 5.36%, against 1.81% nationally. That is about one flight in twenty 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. 23.4% 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 72.4% on time across 745 flights, 12 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 12 points of difference.
One caution: this is a thin sample. 746 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 ORD to DAY
Put together: the delay figures matter less here than the 5.36% cancellation rate. A late arrival costs you about 2.8 hours; 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. 706 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to DAY, every carrier
- PSA on DAY to ORD, the return leg
- Envoy Air on ORD to DAY76.9%
- Republic Airways on ORD to DAY70.8%
- SkyWest Airlines on ORD to DAY60.7%
- 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.