Flight number record
B6 277
JetBlue Airways · Fort Lauderdale to San Francisco
- Route
- FLL → SFO
- Departs
- 20:00
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 277, check with JetBlue Airways.
B6 277 draws a D+. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 363 flights, with a median arrival 6 minutes late.
The national on-time rate over the same period is 77.3%, so B6 277 runs 15 points behind the country as a whole. Across a thousand flights that is about 148 extra late arrivals.
Key figures
On time
62.5%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
12.8%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 277 flies
B6 277 flies FLL to SFO without a single fixed slot. Its most common scheduled departure was 20:00, used on 99 of 363 flights, with 20:35 (37 flights) next.
- Departs 20:0099 flights27.3%
- Departs 20:3537 flights10.2%
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 20:00 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and B6 277 runs 8 points worse at 62.5%. 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
B6 277 next to FLL to SFO
Every carrier on FLL to SFO combined arrived on time 78.7% of the time across 1,236 flights, so B6 277 is 16 points behind it. JetBlue flew 754 flights on the same city pair under all its flight numbers, including this one, and those ran 75.2% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 277thin sample | 363 | 62.5% | 58 min | 0.55% | D+ |
| All JetBlue Airways on FLL–SFO | 754 | 75.2% | 58 min | 0.27% | B+ |
| All carriers on FLL–SFO | 1,236 | 78.7% | 59 min | 0.16% | B+ |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 277 quarter by quarter
B6 277 did not run the same all year. Its best quarter was Jul–Sep 2025 at 73.3% on time and its weakest Jan–Mar 2026 at 56.8%, a swing of 17 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 flights73.3%
- Oct–Dec 202590 flights62.9%
- Jan–Mar 202690 flights56.8%
- Apr–Jun 202691 flights65.9%
- Jul–Sep 202662 flights59.7%
Scale runs 50% to 80%.
By weekday, B6 277 did best on Tuesday at 76.9% on time and worst on Thursday at 45.1%. Each day rests on about 52 flights, so a gap of 32 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 277 runs when it is late
The 135 late arrivals split 47 under half an hour, 42 between 30 and 60 minutes, and 46 an hour or more.
- 15+ min early73 flights20.3%
- Within 15 min152 flights42.2%
- 15–29 min late47 flights13.1%
- 30–59 min late42 flights11.7%
- 1–2 hours late30 flights8.3%
- 2+ hours late16 flights4.4%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
44 of 147 late departures made up the time and arrived on time, 30% of them. In the other direction, 32 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 SFO.
The worst days
Worst days for B6 277
The latest arrival of the period was on 3 March 2026, 3 hours 59 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 March 2026 | 3 hours 59 minutes | Carrier |
| 21 February 2026 | 3 hours 19 minutes | Carrier |
| 25 February 2026 | 2 hours 53 minutes | Late-arriving aircraft |
| 6 April 2026 | 2 hours 53 minutes | Late-arriving aircraft |
| 16 April 2026 | 2 hours 51 minutes | Late-arriving aircraft |
Delay causes
Why B6 277 runs late
Late-arriving aircraft accounts for 44% of the 7,872 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 29%National Airspace System
- 24%Carrier
- 3%Extreme weather
- 1%Security
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,872 reported delay minutes here, that single category outweighs weather by 17 to one. The split is drawn from 7,872 delay minutes reported on B6 277.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,584 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 363 flights under B6 277 in the data flew FLL to SFO. 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. 363 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 277
For a booking, B6 277 is a flight to put a long connection behind. 12.8% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- FLL to SFO, every carrier and departure
- SFO to FLL, the return direction
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- San Francisco International (SFO) 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
- Why the first flight of the morning is statistically safest
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.