Flight number record
DL 1401
Delta Air Lines · Boston to Fort Lauderdale
- Route
- BOS → FLL
- Departs
- 07:10
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1401, check with Delta Air Lines.
DL 1401 lands a B−, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 365 flights, with a median arrival 6 minutes early.
Set against the rest of the country, DL 1401's record is 5 points better than the US average of 77.3%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.
Key figures
On time
82.1%
Arrivals under 15 minutes late, of 351 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
3.84%
National rate is 1.89%
1 hour+ late
5.4%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 6 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 1401 flies
DL 1401 flies BOS to FLL without a single fixed slot. Its most common scheduled departure was 07:10, used on 115 of 365 flights, with 07:05 (86 flights) and 07:00 (54 flights) next.
- Departs 07:10115 flights31.5%
- Departs 07:0586 flights23.6%
- Departs 07:0054 flights14.8%
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 07:10 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1401 runs 7 points worse at 82.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1401 next to BOS to FLL
Every carrier on BOS to FLL combined arrived on time 66.8% of the time across 3,306 flights, so DL 1401 is 15 points ahead of it. Delta flew 887 flights on the same city pair under all its flight numbers, including this one, and those ran 69.8% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1401 | 365 | 82.1% | 67 min | 3.84% | B− |
| All Delta Air Lines on BOS–FLL | 887 | 69.8% | 76 min | 3.04% | C− |
| All carriers on BOS–FLL | 3,306 | 66.8% | 72 min | 3.78% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1401 quarter by quarter
DL 1401 did not run the same all year. Its best quarter was Jul–Sep 2026 at 88.1% on time and its weakest Jan–Mar 2026 at 74.7%, a swing of 13 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 202592 flights81.1%
- Jan–Mar 202690 flights74.7%
- Apr–Jun 202691 flights85.6%
- Jul–Sep 202662 flights88.1%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1401 did best on Friday at 88.2% on time and worst on Monday at 72.0%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1401 runs when it is late
DL 1401 often beats the schedule: 116 of 351 completed flights, 33%, arrived 15 minutes or more early. Most of the lateness is short. 32 of the 63 late arrivals were under half an hour behind, and 19 reached an hour or more.
- 15+ min early116 flights33.0%
- Within 15 min172 flights49.0%
- 15–29 min late32 flights9.1%
- 30–59 min late12 flights3.4%
- 1–2 hours late12 flights3.4%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 351 completed flights by arrival against schedule.
4 of 30 late departures made up the time and arrived on time, 13% of them. In the other direction, 37 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 1401
The latest arrival of the period was on 22 September 2025, 9 hours 16 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 September 2025 | 9 hours 16 minutes | Carrier |
| 24 December 2025 | 8 hours 6 minutes | Late-arriving aircraft |
| 30 December 2025 | 5 hours 18 minutes | Carrier |
| 25 June 2026 | 2 hours 32 minutes | Carrier |
| 27 July 2026 | 2 hours 30 minutes | Carrier |
Delay causes
Why DL 1401 runs late
Carrier accounts for 47% of the 4,190 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 37%National Airspace System
- 12%Late-arriving aircraft
- 4%Extreme weather
37% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,571 minutes out of 4,190, against a national NAS share of 21%. The split is drawn from 4,190 delay minutes reported on DL 1401.
Cancellations run at 3.84%, against 1.89% nationally. That is about one flight in 25 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
5.4% 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 1,237 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.
The same number turns up on one other city pair in the data, including FLL to BOS (247), but none flew often enough under DL 1401 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to FLL only.
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 1401
For a booking, the cancellation rate is the figure to plan around on DL 1401: 3.84% of its 365 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
- BOS to FLL, every carrier and departure
- FLL to BOS, the return direction
- Delta Air Lines 2196 on the same route61.3%
- JetBlue Airways 569 on the same route81.8%
- Boston Logan International (BOS) 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.