Flight number record
DL 2815
Delta Air Lines · Atlanta to Key West
- Route
- ATL → EYW
- Departs
- 17:50
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. 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 rests on 365 flights, with a median arrival 9 minutes early.
Key figures
On time
77.2%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 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.
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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 365 flights, with 17:53 (86 flights) and 18:15 (69 flights) next.
- Departs 17:50100 flights27.4%
- Departs 17:5386 flights23.6%
- Departs 18:1569 flights18.9%
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 17:50 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2815 runs 9 points better at 77.2%. 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 2815 next to ATL to EYW
Every carrier on ATL to EYW combined arrived on time 83.0% of the time across 1,460 flights, so DL 2815 is 6 points behind it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2815 | 365 | 77.2% | 90 min | 1.64% | B |
| All Delta Air Lines on ATL–EYW | 1,460 | 83.0% | 72 min | 1.58% | B |
| All carriers on ATL–EYW | 1,460 | 83.0% | 72 min | 1.58% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2815 quarter by quarter
DL 2815 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 60.0%, a swing of 37 points on roughly 73 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 flights96.7%
- Oct–Dec 202592 flights71.4%
- Jan–Mar 202690 flights82.4%
- Apr–Jun 202691 flights83.1%
- Jul–Sep 202662 flights60.0%
Scale runs 50% to 100%.
By weekday, DL 2815 did best on Thursday at 86.0% on time and worst on Sunday at 62.0%. Each day rests on about 52 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2815 runs when it is late
DL 2815 often beats the schedule: 106 of 355 completed flights, 30%, arrived 15 minutes or more early. The 81 late arrivals split 21 under half an hour, 32 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early106 flights29.9%
- Within 15 min168 flights47.3%
- 15–29 min late21 flights5.9%
- 30–59 min late32 flights9.0%
- 1–2 hours late17 flights4.8%
- 2+ hours late11 flights3.1%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 77 departures that left 15 minutes late or more, only 8 made it up before arrival. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 2815
The latest arrival of the period was on 6 March 2026, 17 hours 49 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 March 2026 | 17 hours 49 minutes | Carrier |
| 28 November 2025 | 15 hours 24 minutes | Extreme weather |
| 18 January 2026 | 13 hours 28 minutes | Extreme weather |
| 1 July 2026 | 3 hours 26 minutes | Carrier |
| 19 July 2026 | 3 hours 8 minutes | Carrier |
Delay causes
Why DL 2815 runs late
Carrier accounts for 51% of the 7,298 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Carrier
- 25%Extreme weather
- 14%Late-arriving aircraft
- 10%National Airspace System
Extreme weather accounts for 25% 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 4.1 times the usual weather exposure. The split is drawn from 7,298 delay minutes reported on DL 2815.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 1.10%.
Connections and routes
What a delay on this flight costs
7.9% 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 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.
Every one of the 365 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. 365 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: 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 EYW, every carrier and departure
- EYW to ATL, the return direction
- Delta Air Lines 1281 on the same route90.4%
- Delta Air Lines 1472 on the same route87.0%
- Delta Air Lines 2168 on the same route78.0%
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.