77% of flights leaving Dayton (DAY) arrived on time over the past 12 months, right at the national average of 76%. About 28 flights leave DAY on a typical day; 2.6% were cancelled. 79% pushed back from the gate on time, so most of the lateness is already there when the flight leaves the gate.
At a glance
- Best hour to fly: 6 a.m. (86% on time). Worst: 5 p.m. (63%).
- Best month: October (88%). Worst: January (72%).
- Most reliable airline here: Delta Air Lines (87%), vs American Airlines at 76%.
- Biggest delay cause: late-arriving aircraft (46% of delay minutes).
- Year on year: getting worse (79% → 77%).
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for flights leaving DAY: when a flight was late, it was under 45 minutes late 42% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 34 three hours or more; 2.6% were cancelled outright.
- On time or early77%
- 15–30 min late5.4%
- 30–60 min late4.8%
- 1–2 hours late4.6%
- 2–3 hours late2.1%
- 3+ hours late2.9%
- Diverted0.3%
- Cancelled2.6%
Share of all 10,354 scheduled flights, past 12 months, by arrival time against schedule.
Best time of day to fly out of DAY
Time of day matters more at DAY than almost anything else you control. Flights scheduled to leave at 6 a.m. arrived on time 86% of the time; at 5 p.m. it was 63%, a 24-point gap. Taken together, early departures (5–9 a.m.) ran 85% on time against 64% for the evening bank (5–10 p.m.). Early planes usually start the day at the airport, so they haven't had a chance to pick up delays elsewhere. By evening a late inbound aircraft, a crew running out of duty hours or an afternoon thunderstorm can push one late flight into the next. Cancellations cluster too: 6 p.m. departures were cancelled 4.9% of the time, against 2.6% overall.
Hour × month
Combine the two and the spread is wider still. The most reliable combination at DAY was a 11 a.m. departure in October (95% on time); the least, 6 p.m. in July (52%). If you can only move one thing, move the hour. Departure hour usually shifts the odds more than the month does.
Each cell: on-time rate for that departure hour in that calendar month, 2023–2026. Find your travel month, then look along the row for the greenest hour.
Best and worst months
January is the hardest month at DAY, with 72% of flights on time across 2023–2026; October is the best at 88%. Summer (June–August) runs 8 points worse than autumn: heavy schedules, peak loads and afternoon thunderstorms. Winter costs 9 points against autumn. Cancellations peak in January (4.6% of flights).
Airlines at DAY
American Airlines runs 52% of departures from DAY, so DAY is effectively its hub. When American Airlines has a bad day, so does the airport. Among airlines with at least 1,000 departures here, Delta Air Lines was the most reliable (87% on time) and American Airlines the least (76%), a 12-point difference. On a route where both fly, that difference is worth more than a small fare gap.
| Airline | Departures | On time | Left on time | Cancelled | Typical arrival |
|---|---|---|---|---|---|
| American Airlines | 5,386 | 76% | 78% | 2.8% | −12 min |
| United Airlines | 3,210 | 76% | 80% | 2.7% | −8 min |
| Delta Air Lines | 1,447 | 87% | 84% | 1.9% | −20 min |
| Allegiant Air | 311 | 63% | 63% | 1.0% | +2 min |
Why flights are late at DAY
Airlines report a cause for every flight that arrives 15 or more minutes late. At DAY, 46% of delay minutes came from late-arriving aircraft: the plane showed up late from its previous flight, so the delay started somewhere else. Next is the airlines themselves at 26%. That's why the first flight of the morning is the safest bet: it has no earlier flight to inherit a delay from. Of the 268 cancellations, 74% were blamed on weather.
The average taxi from gate to takeoff is 18 minutes, about typical for a large U.S. airport.
Month by month
Over the latest 12 months 77% of DAY departures were on time, against 79% in the 12 months before, a decline of 1 points. The best recent month was September 2025 (85%); the worst, January 2026 (71%).
Worst cancellation days
The worst single day in the past year was Sunday, Jan 25, 2026, when 86% of 28 scheduled departures were cancelled. Days like that are usually a major storm, a system outage or a holiday peak hitting bad weather. No average predicts them, so on a stormy forecast, check your airline's travel waivers.
| Date | Departures | Cancelled | On time |
|---|---|---|---|
| Jan 25, 2026 | 28 | 86% | 0% |
| Jan 26, 2026 | 28 | 39% | 18% |
| Jan 31, 2026 | 23 | 30% | 43% |
| Jan 24, 2026 | 23 | 22% | 48% |
| Nov 9, 2025 | 33 | 21% | 36% |
| Mar 7, 2026 | 24 | 21% | 29% |
| Mar 15, 2026 | 29 | 21% | 62% |
| Nov 29, 2025 | 30 | 20% | 53% |
| Apr 2, 2026 | 31 | 19% | 58% |
| Nov 10, 2025 | 31 | 19% | 23% |
Last flights of the day
The last flight of the day is a different bet. Across routes from DAY, each airline's final departure was cancelled 4.0% of the time, against 2.3% for its earlier flights (1.8× as often). Late in the day crews run short on duty hours, aircraft arrive late from elsewhere, and with no later flight to fold passengers into, cancelling is easier for the airline. 3.6% of last flights landed 3+ hours late. The riskiest last flight out was American Airlines to Washington (7.3% cancelled).
| Last flight to | Airline | Leaves | Cancelled | 3h+ late | On time |
|---|---|---|---|---|---|
| DCA Washington | American Airlines | 4:46 p.m. | 7.3% | 6.1% | 43% |
| ORD Chicago | American Airlines | 4:10 p.m. | 5.5% | 5.5% | 61% |
| ORD Chicago | United Airlines | 6:15 p.m. | 6.0% | 3.8% | 56% |
| CLT Charlotte | American Airlines | 5:51 p.m. | 2.2% | 4.1% | 69% |
| IAD Washington | United Airlines | 7:43 p.m. | 2.2% | 2.5% | 81% |
| DFW Dallas | American Airlines | 6:32 p.m. | 2.5% | 1.9% | 69% |
| ATL Atlanta | Delta Air Lines | 6:33 p.m. | 2.7% | 1.4% | 82% |
Each airline's last scheduled departure of the day on a route, on days it flies the route at least twice; past 12 months. Riskiest first.
Tips for flying out of DAY
- Book the earliest departure you can live with. At DAY the 6 a.m. flights do best.
- Traveling in January? Leave extra slack for anything that can't move: cruises, weddings, the last connection of the day.
- Choosing between airlines? Delta Air Lines has the better record here.
- Need to arrive tonight? Don't book the last flight out of DAY; the one before it leaves you a backup.
- Delayed already? Most delays at DAY come from late-arriving aircraft. If your inbound plane is late, your flight will be too, whatever the board says.
Routes from DAY
Where you're going matters too. From DAY, the most reliable busy route was to Atlanta (ATL, 87% on time) and the least reliable to Chicago (ORD, 71%). Flights into congested airports inherit their delays: an air traffic program at the destination holds planes on the ground here.
Least reliable first. Routes with at least 365 flights a year.
| To | Flights | On time | Cancelled | Typical arrival |
|---|---|---|---|---|
| DCA Washington | 959 | 67% | 4.2% | −7 min |
| ORD Chicago | 3,196 | 71% | 3.8% | −7 min |
| DFW Dallas | 1,359 | 78% | 2.1% | −14 min |
| IAD Washington | 948 | 80% | 1.8% | −9 min |
| CLT Charlotte | 1,406 | 81% | 1.6% | −13 min |
| ATL Atlanta | 1,441 | 87% | 1.9% | −20 min |
| DEN Denver | 365 | 92% | 0.8% | −13 min |
Flights into DAY
Arriving rather than leaving? These are the routes into James M. Cox Dayton, least reliable first. The weakest is from Washington (61% on time).
| From | Flights | On time | Cancelled |
|---|---|---|---|
| DCA Washington | 956 | 61% | 3.7% |
| ORD Chicago | 3,200 | 64% | 3.9% |
| CLT Charlotte | 1,406 | 71% | 1.4% |
| DEN Denver | 365 | 72% | 0.5% |
| DFW Dallas | 1,356 | 72% | 2.2% |
| IAD Washington | 948 | 79% | 1.5% |
| ATL Atlanta | 1,441 | 83% | 1.8% |
Questions about DAY delays
What is the best time to fly out of DAY?
Flights scheduled at 6 a.m.: over the past year 86% of DAY departures at that hour arrived on time, against 63% at 5 p.m., the worst hour.
What month has the most flight delays at DAY?
January (72% on time). October is the best month (88%).
Which airline is most on time at DAY?
Delta Air Lines: 87% of its DAY departures arrived on time over the past year. American Airlines had the weakest record at 76%.
Why are flights delayed at DAY?
The biggest cause was late-arriving aircraft (46% of delay minutes): the plane showed up late from its previous flight, so the delay started somewhere else. Then the airlines themselves (26%).
How often are flights cancelled at DAY?
2.6% of scheduled departures over the past 12 months, peaking in January at 4.6%.
Hours are scheduled local departure times. "On time" means arriving less than 15 minutes late at the destination; cancelled and diverted flights count as not on time. Method.