Flight number record

DL 1522

Delta Air Lines · Columbus to Atlanta

Route: CMH → ATL
Departs: 12:33
Flights: 355
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.3 hours. That rests on 355 flights, with a median arrival 12 minutes early.

Set against the rest of the country, DL 1522's record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 349 completed flights

Avg delay

137 min

Across delayed arrivals only, not all flights

Cancelled

1.69%

National rate is 1.81%

1 hour+ late

5.2%

National rate is 8.1%

These figures cover 355 flights between July 2025 and June 2026. The median arrival is 12 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 1522 flies

DL 1522 flies CMH to ATL without a single fixed slot. Its most common scheduled departure was 12:33, used on 41 of 355 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:3341 flights11.5%

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 12:33 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1522 runs 9 points better at 87.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1522 next to CMH to ATL

Every carrier on CMH to ATL combined arrived on time 85.9% of the time across 3,160 flights, so DL 1522 is 2 points ahead of it. Delta flew 2,693 flights on the same city pair under all its flight numbers, including this one, and those ran 88.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.

DL 1522 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1522thin sample	355	87.7%	137 min	1.69%	A
All Delta Air Lines on CMH–ATL	2,693	88.2%	92 min	1.56%	A
All carriers on CMH–ATL	3,160	85.9%	82 min	1.52%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 89 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 202591 flights89.0%
Oct–Dec 202587 flights81.6%
Jan–Mar 202689 flights85.7%
Apr–Jun 202688 flights94.3%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1522 did best on Wednesday at 98.0% on time and worst on Tuesday at 78.4%. Each day rests on about 51 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1522 runs late

One category carries most of the weight here. Carrier accounts for 60% of the 5,890 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
60%
Late-arriving aircraft
37%
National Airspace System
3%
Extreme weather
0%

37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,890 reported delay minutes here, that single category outweighs weather by 37 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,890 delay minutes reported on DL 1522.

Cancellations sit at 1.69% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.2% of arrivals land an hour or more late, close to the national 8.1%. 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 2.3 hours, which a normal layover absorbs.

DL 1522 is not only a CMH to ATL flight. It also flew ATL to CMH (346 flights, 88.5% 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. 355 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.

Other routes flown as DL 1522
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to CMHthin sample	346	88.5%	70 min	1.73%	A

What to do with this

Booking DL 1522

For a booking, read DL 1522 as 87.7% on time with 1.69% cancelled over 355 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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