Flight number record
DL 1522
Delta Air Lines · Columbus to Atlanta
- Route
- CMH → ATL
- Departs
- 12:48
- Flights
- 352
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1522, check with Delta Air Lines.
DL 1522 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 352 flights, with a median arrival 13 minutes early.
Set against the rest of the country, DL 1522's record is 11 points better than the US average of 77.3%. That gap is worth roughly 105 fewer late arrivals for every thousand flights.
Key figures
On time
87.8%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
123 min
Across delayed arrivals only, not all flights
Cancelled
1.70%
National rate is 1.89%
1 hour+ late
5.2%
National rate is 8.3%
These figures cover 352 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 1522 flies
DL 1522 flies CMH to ATL without a single fixed slot. Its most common scheduled departure was 12:48, used on 44 of 352 flights, with 12:33 (41 flights) next.
- Departs 12:4844 flights12.5%
- Departs 12:3341 flights11.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 12:48 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1522 runs 10 points better at 87.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1522 next to CMH to ATL
Every carrier on CMH to ATL combined arrived on time 84.8% of the time across 3,129 flights, so DL 1522 is 3 points ahead of it. Delta flew 2,678 flights on the same city pair under all its flight numbers, including this one, and those ran 87.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1522thin sample | 352 | 87.8% | 123 min | 1.70% | A |
| All Delta Air Lines on CMH–ATL | 2,678 | 87.1% | 91 min | 1.38% | A |
| All carriers on CMH–ATL | 3,129 | 84.8% | 82 min | 1.44% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1522 quarter by quarter
DL 1522 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.3% on time and its weakest Oct–Dec 2025 at 81.6%, a swing of 13 points on roughly 88 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202529 flights—
- Oct–Dec 202587 flights81.6%
- Jan–Mar 202689 flights85.7%
- Apr–Jun 202688 flights94.3%
- Jul–Sep 202659 flights84.2%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1522 did best on Thursday at 96.0% on time and worst on Monday at 76.5%. Each day rests on about 50 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1522 runs when it is late
DL 1522 often beats the schedule: 151 of 344 completed flights, 44%, arrived 15 minutes or more early. The 42 late arrivals split 15 under half an hour, 9 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early151 flights43.9%
- Within 15 min151 flights43.9%
- 15–29 min late15 flights4.4%
- 30–59 min late9 flights2.6%
- 1–2 hours late9 flights2.6%
- 2+ hours late9 flights2.6%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
5 of 38 late departures made up the time and arrived on time, 13% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 1522
The latest arrival of the period was on 23 January 2026, 19 hours 17 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 January 2026 | 19 hours 17 minutes | Carrier |
| 14 November 2025 | 10 hours 24 minutes | Carrier |
| 23 December 2025 | 7 hours 40 minutes | Carrier |
| 5 January 2026 | 5 hours 24 minutes | Late-arriving aircraft |
| 16 March 2026 | 5 hours 19 minutes | Late-arriving aircraft |
Delay causes
Why DL 1522 runs late
Carrier accounts for 53% of the 5,174 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 40%Late-arriving aircraft
- 6%National Airspace System
- 1%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,174 reported delay minutes here, that single category outweighs weather by 40 to one. The split is drawn from 5,174 delay minutes reported on DL 1522.
Cancellations sit at 1.70% against a national 1.89%, which is ordinary. Diversions add another 0.57%.
Connections and routes
What a delay on this flight costs
5.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
DL 1522 is not only a CMH to ATL flight. It also flew ATL to CMH (343 flights, 90.8% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 352 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to CMHthin sample | 343 | 90.8% | 81 min | 1.75% | A |
What to do with this
Booking DL 1522
For a booking, read DL 1522 as 87.8% on time with 1.70% cancelled over 352 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- CMH to ATL, every carrier and departure
- ATL to CMH, the return direction
- Delta Air Lines 2469 on the same route90.9%
- Delta Air Lines 1479 on the same route88.0%
- Delta Air Lines 2909 on the same route91.6%
- Delta Air Lines 2200 on the same route87.0%
- John Glenn Columbus International (CMH) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.