Flight number record
B6 379
JetBlue Airways · Washington to Fort Lauderdale
- Route
- DCA → FLL
- Departs
- 07:30
- Flights
- 356
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 379, check with JetBlue Airways.
B6 379 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 about an hour on average. That rests on 356 flights, with a median arrival 3 minutes early.
Key figures
On time
77.1%
Arrivals under 15 minutes late, of 340 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
3.93%
National rate is 1.89%
1 hour+ late
5.6%
National rate is 8.3%
These figures cover 356 flights between September 2025 and August 2026. The median arrival is 3 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 B6 379 flies
B6 379 flies DCA to FLL without a single fixed slot. Its most common scheduled departure was 07:30, used on 73 of 356 flights, with 06:00 (58 flights) and 07:00 (50 flights) next.
- Departs 07:3073 flights20.5%
- Departs 06:0058 flights16.3%
- Departs 07:0050 flights14.0%
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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 379 runs 12 points worse at 77.1%. 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
B6 379 next to DCA to FLL
Every carrier on DCA to FLL combined arrived on time 67.7% of the time across 2,320 flights, so B6 379 is 9 points ahead of it. JetBlue flew 1,380 flights on the same city pair under all its flight numbers, including this one, and those ran 68.1% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 379thin sample | 356 | 77.1% | 59 min | 3.93% | B− |
| All JetBlue Airways on DCA–FLL | 1,380 | 68.1% | 80 min | 3.48% | C− |
| All carriers on DCA–FLL | 2,320 | 67.7% | 74 min | 2.80% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 379 quarter by quarter
B6 379 did not run the same all year. Its best quarter was Jul–Sep 2026 at 82.7% on time and its weakest Jan–Mar 2026 at 61.2%, a swing of 22 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 202523 flights—
- Oct–Dec 202591 flights81.1%
- Jan–Mar 202690 flights61.2%
- Apr–Jun 202691 flights81.1%
- Jul–Sep 202661 flights82.7%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, B6 379 did best on Saturday at 83.3% on time and worst on Tuesday at 71.1%. Each day rests on about 51 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 379 runs when it is late
The 78 late arrivals split 31 under half an hour, 28 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early76 flights22.4%
- Within 15 min186 flights54.7%
- 15–29 min late31 flights9.1%
- 30–59 min late28 flights8.2%
- 1–2 hours late10 flights2.9%
- 2+ hours late9 flights2.6%
Scale runs 0% to 100%.
Share of 340 completed flights by arrival against schedule.
9 of 51 late departures made up the time and arrived on time, 18% of them. In the other direction, 36 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 B6 379
The latest arrival of the period was on 14 March 2026, 8 hours 45 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 March 2026 | 8 hours 45 minutes | Late-arriving aircraft |
| 30 December 2025 | 4 hours 26 minutes | Carrier |
| 22 August 2026 | 3 hours 16 minutes | Carrier |
| 10 August 2026 | 3 hours 5 minutes | Carrier |
| 27 January 2026 | 2 hours 40 minutes | Carrier |
Delay causes
Why B6 379 runs late
Carrier accounts for 50% of the 4,610 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 31%National Airspace System
- 17%Late-arriving aircraft
- 2%Extreme weather
- 0%Security
The largest share of delay minutes, 50%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,311 of the 4,610 delay minutes reported here. The split is drawn from 4,610 delay minutes reported on B6 379.
Cancellations run at 3.93%, 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
5.6% 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 899 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 356 flights under B6 379 in the data flew DCA to FLL. 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. 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.
What to do with this
Booking B6 379
For a booking, the cancellation rate is the figure to plan around on B6 379: 3.93% of its 356 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
- DCA to FLL, every carrier and departure
- FLL to DCA, the return direction
- JetBlue Airways 579 on the same route81.5%
- JetBlue Airways 1579 on the same route57.2%
- JetBlue Airways 1979 on the same route56.4%
- Ronald Reagan Washington National (DCA) delay statistics
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- JetBlue Airways on-time record
- Every JetBlue Airways 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 JetBlue Airways’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.