Flight number record

DL 2815

Delta Air Lines · Atlanta to Key West

Route: ATL → EYW
Departs: 17:50
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2815, check with Delta Air Lines.

DL 2815 lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 9 minutes early.

On time

77.5%

Arrivals under 15 minutes late, of 355 completed flights

Avg delay

89 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

7.3%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 9 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 2815 flies

DL 2815 flies ATL to EYW without a single fixed slot. Its most common scheduled departure was 17:50, used on 100 of 364 flights, with 17:53 (90 flights) and 18:15 (90 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:50100 flights27.5%
Departs 17:5390 flights24.7%
Departs 18:1590 flights24.7%

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 17:50 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 2815 runs 9 points better at 77.5%. 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 2815 next to ATL to EYW

Every carrier on ATL to EYW combined arrived on time 82.5% of the time across 1,457 flights, so DL 2815 is 5 points behind it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.

DL 2815 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2815thin sample	364	77.5%	89 min	1.37%	B
All Delta Air Lines on ATL–EYW	1,457	82.5%	70 min	1.30%	B
All carriers on ATL–EYW	1,457	82.5%	70 min	1.30%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2815 quarter by quarter

DL 2815 did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.1% on time and its weakest Oct–Dec 2025 at 71.4%, a swing of 12 points on roughly 91 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 flights73.3%
Oct–Dec 202592 flights71.4%
Jan–Mar 202690 flights82.4%
Apr–Jun 202691 flights83.1%

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

By weekday, DL 2815 did best on Wednesday at 84.3% on time and worst on Sunday at 66.0%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2815 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 7,137 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
48%
Extreme weather
27%
Late-arriving aircraft
14%
National Airspace System
10%

Extreme weather accounts for 27% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 4.4 times the usual weather exposure. The split is drawn from 7,137 delay minutes reported on DL 2815.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 1.10%.

Connections and routes

What a delay on this flight costs

7.3% 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 an hour and a half, which a normal layover absorbs.

The 646 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 364 flights under DL 2815 in the data flew ATL to EYW. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 364 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 2815

For a booking, DL 2815 is one of the weaker ways to fly ATL to EYW: 5 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