Flight number record
DL 1479
Delta Air Lines · Columbus to Atlanta
- Route
- CMH → ATL
- Departs
- 10:02
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1479, check with Delta Air Lines.
DL 1479 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 an hour and a half. That rests on 317 flights, with a median arrival 13 minutes early.
Set against the rest of the country, DL 1479's record is 11 points better than the US average of 77.3%. That gap is worth roughly 107 fewer late arrivals for every thousand flights.
Key figures
On time
88.0%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
2.52%
National rate is 1.89%
1 hour+ late
4.9%
National rate is 8.3%
These figures cover 317 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 1479 flies
DL 1479 flies CMH to ATL without a single fixed slot. Its most common scheduled departure was 10:02, used on 59 of 317 flights, with 11:10 (37 flights) next.
- Departs 10:0259 flights18.6%
- Departs 11:1037 flights11.7%
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 10:02 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1479 runs 4 points better at 88.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1479 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 1479 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 1479thin sample | 317 | 88.0% | 90 min | 2.52% | 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 1479 quarter by quarter
DL 1479 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.4% on time and its weakest Jan–Mar 2026 at 81.2%, a swing of 15 points on roughly 79 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 202517 flights—
- Oct–Dec 202572 flights87.3%
- Jan–Mar 202687 flights81.2%
- Apr–Jun 202688 flights96.4%
- Jul–Sep 202653 flights84.6%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1479 did best on Wednesday at 93.8% on time and worst on Monday at 81.2%. Each day rests on about 45 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1479 runs when it is late
DL 1479 often beats the schedule: 139 of 309 completed flights, 45%, arrived 15 minutes or more early. The 37 late arrivals split 13 under half an hour, 9 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early139 flights45.0%
- Within 15 min133 flights43.0%
- 15–29 min late13 flights4.2%
- 30–59 min late9 flights2.9%
- 1–2 hours late7 flights2.3%
- 2+ hours late8 flights2.6%
Scale runs 0% to 100%.
Share of 309 completed flights by arrival against schedule.
10 of 40 late departures made up the time and arrived on time, 25% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for DL 1479
The latest arrival of the period was on 5 August 2026, 10 hours 14 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 |
|---|---|---|
| 5 August 2026 | 10 hours 14 minutes | Carrier |
| 11 January 2026 | 9 hours 55 minutes | Carrier |
| 16 March 2026 | 3 hours 9 minutes | Late-arriving aircraft |
| 11 September 2025 | 2 hours 51 minutes | Carrier |
| 7 December 2025 | 2 hours 38 minutes | Late-arriving aircraft |
Delay causes
Why DL 1479 runs late
Carrier accounts for 49% of the 3,338 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 35%Late-arriving aircraft
- 12%National Airspace System
- 3%Extreme weather
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,338 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 3,338 delay minutes reported on DL 1479.
Cancellations run at 2.52%, against 1.89% nationally. That is about one flight in 40 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
DL 1479 is not only a CMH to ATL flight. It also flew ATL to CMH (283 flights, 89.5% 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. 317 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 | 283 | 89.5% | 49 min | 2.47% | A |
What to do with this
Booking DL 1479
For a booking, the cancellation rate is the figure to plan around on DL 1479: 2.52% of its 317 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
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 1522 on the same route87.8%
- 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.