Flight number record

DL 1501

Delta Air Lines · Atlanta to Columbus

Route: ATL → CMH
Departs: 19:08
Flights: 265
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land about 50 minutes behind schedule. That rests on 265 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.6%, so DL 1501 runs 6 points behind the country as a whole. Across a thousand flights that is about 62 extra late arrivals.

On time

71.4%

Arrivals under 15 minutes late, of 262 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

1.13%

National rate is 1.81%

1 hour+ late

7.6%

National rate is 8.1%

These figures cover 265 flights between July 2025 and June 2026. The median arrival is 3 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.

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 265 flights, with 19:05 (31 flights) and 20:59 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:0834 flights12.8%
Departs 19:0531 flights11.7%
Departs 20:5931 flights11.7%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 68.2%, and DL 1501 runs 3 points better at 71.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 1501 next to ATL to CMH

Every carrier on ATL to CMH combined arrived on time 80.5% of the time across 3,159 flights, so DL 1501 is 9 points behind it. Delta flew 2,693 flights on the same city pair under all its flight numbers, including this one, and those ran 82.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 10 points.

DL 1501 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1501thin sample	265	71.4%	49 min	1.13%	C
All Delta Air Lines on ATL–CMH	2,693	82.1%	54 min	1.52%	B
All carriers on ATL–CMH	3,159	80.5%	54 min	1.46%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 2025 at 63.5%, a swing of 22 points on roughly 66 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 202586 flights63.5%
Oct–Dec 202579 flights70.9%
Jan–Mar 202646 flights70.5%
Apr–Jun 202654 flights85.2%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1501 did best on Wednesday at 81.1% on time and worst on Sunday at 55.0%. Each day rests on about 38 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1501 runs late

One category carries most of the weight here. Carrier accounts for 54% of the 3,690 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.

Carrier
54%
Late-arriving aircraft
27%
National Airspace System
13%
Extreme weather
7%

The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,976 of the 3,690 delay minutes reported here. The split is drawn from 3,690 delay minutes reported on DL 1501.

Cancellations sit at 1.13% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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. 265 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: 9 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures