Flight number record
DL 305
Delta Air Lines · New York to Fort Lauderdale
- Route
- JFK → FLL
- Departs
- 11:20
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 305, check with Delta Air Lines.
DL 305 lands a B−, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 364 flights, with a median arrival 11 minutes early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
3.57%
National rate is 1.89%
1 hour+ late
7.8%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 11 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 305 flies
DL 305 flies JFK to FLL without a single fixed slot. Its most common scheduled departure was 11:20, used on 109 of 364 flights, with 11:10 (89 flights) and 11:15 (60 flights) next.
- Departs 11:20109 flights29.9%
- Departs 11:1089 flights24.5%
- Departs 11:1560 flights16.5%
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 11:20 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 305 runs level with that at 77.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 305 next to JFK to FLL
Every carrier on JFK to FLL combined arrived on time 71.9% of the time across 3,907 flights, so DL 305 is 6 points ahead of it. Delta flew 1,614 flights on the same city pair under all its flight numbers, including this one, and those ran 75.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 305thin sample | 364 | 77.9% | 64 min | 3.57% | B− |
| All Delta Air Lines on JFK–FLL | 1,614 | 75.3% | 66 min | 3.90% | B− |
| All carriers on JFK–FLL | 3,907 | 71.9% | 70 min | 4.76% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 305 quarter by quarter
DL 305 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.1% on time and its weakest Jan–Mar 2026 at 67.1%, a swing of 25 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 202530 flights—
- Oct–Dec 202591 flights78.4%
- Jan–Mar 202690 flights67.1%
- Apr–Jun 202691 flights92.1%
- Jul–Sep 202662 flights68.9%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 305 did best on Thursday at 88.2% on time and worst on Monday at 70.6%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 305 runs when it is late
DL 305 often beats the schedule: 150 of 348 completed flights, 43%, arrived 15 minutes or more early. The 77 late arrivals split 30 under half an hour, 20 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early150 flights43.1%
- Within 15 min121 flights34.8%
- 15–29 min late30 flights8.6%
- 30–59 min late20 flights5.7%
- 1–2 hours late18 flights5.2%
- 2+ hours late9 flights2.6%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
17 of 63 late departures made up the time and arrived on time, 27% of them. In the other direction, 31 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at FLL.
The worst days
Worst days for DL 305
The latest arrival of the period was on 2 November 2025, 6 hours 58 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across November, September, March, October and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 November 2025 | 6 hours 58 minutes | Late-arriving aircraft |
| 25 September 2025 | 5 hours 53 minutes | Carrier |
| 16 March 2026 | 5 hours 52 minutes | National Airspace System |
| 6 October 2025 | 3 hours 30 minutes | Late-arriving aircraft |
| 7 July 2026 | 3 hours 8 minutes | Carrier |
Delay causes
Why DL 305 runs late
National Airspace System accounts for 43% of the 4,948 delay minutes carriers reported here, and the remaining four split what is left.
- 43%National Airspace System
- 36%Carrier
- 21%Late-arriving aircraft
- 0%Extreme weather
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,770 of the 4,948 delay minutes reported here. The split is drawn from 4,948 delay minutes reported on DL 305.
Cancellations run at 3.57%, against 1.89% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
7.8% 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 about an hour, which a normal layover absorbs.
The 1,069 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.
DL 305 is not only a JFK to FLL flight. It also flew FLL to JFK (348 flights, 71.3% 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. 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| FLL to JFKthin sample | 348 | 71.3% | 73 min | 5.17% | C− |
What to do with this
Booking DL 305
For a booking, the cancellation rate is the figure to plan around on DL 305: 3.57% of its 364 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to FLL, every carrier and departure
- FLL to JFK, the return direction
- Delta Air Lines 1422 on the same route86.6%
- Delta Air Lines 1419 on the same route72.5%
- Delta Air Lines 1414 on the same route66.2%
- JetBlue Airways 1 on the same route86.1%
- JetBlue Airways 1801 on the same route63.8%
- John F. Kennedy International (JFK) delay statistics
- Fort Lauderdale-Hollywood International (FLL) 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
- What a cancellation rate actually tells you (and what it hides)
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.