Flight number record

B6 277

JetBlue Airways · Fort Lauderdale to San Francisco

Route: FLL → SFO
Departs: 20:00
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 4 minutes late.

The national on-time rate over the same period is 77.6%, so B6 277 runs 15 points behind the country as a whole. Across a thousand flights that is about 146 extra late arrivals.

On time

63.0%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

11.4%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. Beyond the headline rate, 11.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 20:45 (51 flights) and 20:35 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:0099 flights27.3%
Departs 20:4551 flights14.0%
Departs 20:3537 flights10.2%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 70.5%, and B6 277 runs 8 points worse at 63.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

B6 277 next to FLL to SFO

Every carrier on FLL to SFO combined arrived on time 79.5% of the time across 1,265 flights, so B6 277 is 17 points behind it. JetBlue flew 774 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight trails by 10 points.

B6 277 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 277thin sample	363	63.0%	56 min	0.83%	D+
All JetBlue Airways on FLL–SFO	774	76.7%	56 min	0.52%	B+
All carriers on FLL–SFO	1,265	79.5%	58 min	0.47%	B+
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 277 quarter by quarter

Quarter by quarter B6 277 held fairly steady: 65.9% in Jul–Sep 2025, 62.9% in Oct–Dec 2025, 56.8% in Jan–Mar 2026 and 65.9% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights65.9%
Oct–Dec 202590 flights62.9%
Jan–Mar 202690 flights56.8%
Apr–Jun 202691 flights65.9%

Scale runs 50% to 70%. Rows with fewer than 30 flights show a dash.

By weekday, B6 277 did best on Tuesday at 77.4% on time and worst on Monday at 50.0%. Each day rests on about 52 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 277 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 7,387 reported delay minutes.

Late-arriving aircraft
41%
National Airspace System
30%
Carrier
26%
Extreme weather
2%
Security
1%

41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 7,387 reported delay minutes here, that single category outweighs weather by 21 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 7,387 delay minutes reported on B6 277.

Cancellations are rare at 0.83%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 one of the weaker ways to fly FLL to SFO: 17 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures