Flight number record
DL 1501
Delta Air Lines · Atlanta to Columbus
- Route
- ATL → CMH
- Departs
- 19:08
- Flights
- 257
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1501, check with Delta Air Lines.
DL 1501 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about 50 minutes behind schedule. That rests on 257 flights, with a median arrival 5 minutes early.
Key figures
On time
73.7%
Arrivals under 15 minutes late, of 255 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
0.78%
National rate is 1.89%
1 hour+ late
6.3%
National rate is 8.3%
These figures cover 257 flights between September 2025 and August 2026. The median arrival is 5 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 1501 flies
DL 1501 flies ATL to CMH without a single fixed slot. Its most common scheduled departure was 19:08, used on 34 of 257 flights, with 20:59 (31 flights) next.
- Departs 19:0834 flights13.2%
- Departs 20:5931 flights12.1%
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 19:08 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1501 runs 6 points better at 73.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1501 next to ATL to CMH
Every carrier on ATL to CMH combined arrived on time 80.0% of the time across 3,130 flights, so DL 1501 is 6 points behind it. Delta flew 2,679 flights on the same city pair under all its flight numbers, including this one, and those ran 81.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1501thin sample | 257 | 73.7% | 49 min | 0.78% | C+ |
| All Delta Air Lines on ATL–CMH | 2,679 | 81.6% | 56 min | 1.38% | B |
| All carriers on ATL–CMH | 3,130 | 80.0% | 56 min | 1.41% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1501 quarter by quarter
DL 1501 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.2% on time and its weakest Jul–Sep 2026 at 68.8%, a swing of 16 points on roughly 51 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 202530 flights73.3%
- Oct–Dec 202579 flights70.9%
- Jan–Mar 202646 flights70.5%
- Apr–Jun 202654 flights85.2%
- Jul–Sep 202648 flights68.8%
Scale runs 60% to 90%.
By weekday, DL 1501 did best on Wednesday at 88.9% on time and worst on Sunday at 59.0%. Each day rests on about 37 flights, so a gap of 30 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1501 runs when it is late
The 67 late arrivals split 22 under half an hour, 29 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early34 flights13.3%
- Within 15 min154 flights60.4%
- 15–29 min late22 flights8.6%
- 30–59 min late29 flights11.4%
- 1–2 hours late14 flights5.5%
- 2+ hours late2 flights0.8%
Scale runs 0% to 100%.
Share of 255 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 65 departures that left 15 minutes late or more, only 4 made it up before arrival. 6 flights left on time and still arrived late.
The worst days
Worst days for DL 1501
The latest arrival of the period was on 10 October 2025, 2 hours 54 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across October, May, January, September and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 October 2025 | 2 hours 54 minutes | Carrier |
| 18 May 2026 | 2 hours 16 minutes | Late-arriving aircraft |
| 25 January 2026 | 1 hour 52 minutes | Extreme weather |
| 10 September 2025 | 1 hour 51 minutes | Carrier |
| 24 July 2026 | 1 hour 50 minutes | Late-arriving aircraft |
Delay causes
Why DL 1501 runs late
Carrier accounts for 48% of the 3,290 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 34%Late-arriving aircraft
- 12%National Airspace System
- 6%Extreme weather
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,290 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 3,290 delay minutes reported on DL 1501.
Cancellations are rare at 0.78%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
6.3% 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 about 50 minutes, which a normal layover absorbs.
The same number turns up on one other city pair in the data, including MIA to BOS (24), but none flew often enough under DL 1501 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to CMH only.
One caution: this is a thin sample. 257 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 DL 1501
For a booking, DL 1501 is one of the weaker ways to fly ATL to CMH: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- ATL to CMH, every carrier and departure
- CMH to ATL, the return direction
- Delta Air Lines 1522 on the same route90.8%
- Delta Air Lines 2200 on the same route86.6%
- Delta Air Lines 1459 on the same route78.5%
- Delta Air Lines 1479 on the same route89.5%
- Delta Air Lines 2786 on the same route73.4%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- John Glenn Columbus International (CMH) 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.