Flight number record

DL 2484

Delta Air Lines · Atlanta to Birmingham

Route: ATL → BHM
Departs: 16:35
Flights: 356
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2484, check with Delta Air Lines.

DL 2484 lands a B, level with the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That is a workable record, not a spotless one. That rests on 356 flights, with a median arrival 7 minutes early.

On time

78.3%

Arrivals under 15 minutes late, of 350 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

1.40%

National rate is 1.81%

1 hour+ late

6.0%

National rate is 8.1%

These figures cover 356 flights between July 2025 and June 2026. The median arrival is 7 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 2484 flies

DL 2484 flies ATL to BHM without a single fixed slot. Its most common scheduled departure was 16:35, used on 57 of 356 flights, with 16:25 (47 flights) and 16:45 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:3557 flights16.0%
Departs 16:2547 flights13.2%
Departs 16:4538 flights10.7%

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 16:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2484 runs 6 points better at 78.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2484 next to ATL to BHM

Every carrier on ATL to BHM combined arrived on time 84.0% of the time across 3,306 flights, so DL 2484 is 6 points behind it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 3 points.

DL 2484 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2484thin sample	356	78.3%	54 min	1.40%	B
All Delta Air Lines on ATL–BHM	3,306	84.0%	64 min	1.72%	B
All carriers on ATL–BHM	3,306	84.0%	64 min	1.72%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2484 quarter by quarter

DL 2484 did not run the same all year. Its best quarter was Jan–Mar 2026 at 82.6% on time and its weakest Jul–Sep 2025 at 72.5%, a swing of 10 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 202592 flights72.5%
Oct–Dec 202589 flights80.5%
Jan–Mar 202687 flights82.6%
Apr–Jun 202688 flights77.9%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2484 did best on Friday at 86.5% on time and worst on Monday at 72.5%. Each day rests on about 51 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2484 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 4,080 reported delay minutes.

Late-arriving aircraft
40%
Carrier
38%
National Airspace System
14%
Extreme weather
7%

40% 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 4,080 reported delay minutes here, that single category outweighs weather by 5 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 4,080 delay minutes reported on DL 2484.

Cancellations sit at 1.40% against a national 1.81%, which is ordinary. Diversions add another 0.28%.

Connections and routes

What a delay on this flight costs

6.0% 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 roughly 55 minutes, which a normal layover absorbs.

DL 2484 is not only a ATL to BHM flight. It also flew BHM to ATL (309 flights, 80.3% 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. 356 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 2484
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
BHM to ATLthin sample	309	80.3%	83 min	0.97%	B+

What to do with this

Booking DL 2484

For a booking, DL 2484 is one of the weaker ways to fly ATL to BHM: 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.

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