Flight number record

B6 1347

JetBlue Airways · Washington to San Juan

Route: DCA → SJU
Departs: 08:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 1347, check with JetBlue Airways.

B6 1347 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 365 flights, with a median arrival 7 minutes early.

On time

74.9%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

76 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

8.9%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% 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 1347 flies

B6 1347 flies DCA to SJU without a single fixed slot. Its most common scheduled departure was 08:00, used on 238 of 365 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:00238 flights65.2%

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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and B6 1347 runs 9 points worse at 74.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

B6 1347 next to DCA to SJU

Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 2 points.

B6 1347 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 1347	365	74.9%	76 min	1.10%	C
All JetBlue Airways on DCA–SJU	365	74.9%	76 min	1.10%	C
All carriers on DCA–SJU	365	74.9%	76 min	1.10%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 1347 quarter by quarter

Quarter by quarter B6 1347 held fairly steady: 78.3% in Jul–Sep 2025, 74.7% in Oct–Dec 2025, 71.8% in Jan–Mar 2026 and 74.4% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights78.3%
Oct–Dec 202592 flights74.7%
Jan–Mar 202690 flights71.8%
Apr–Jun 202691 flights74.4%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, B6 1347 did best on Wednesday at 82.7% on time and worst on Friday at 65.4%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 1347 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 6,879 reported delay minutes.

National Airspace System
40%
Carrier
33%
Extreme weather
16%
Late-arriving aircraft
10%

Extreme weather accounts for 16% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.6 times the usual weather exposure. The split is drawn from 6,879 delay minutes reported on B6 1347.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.82%.

Connections and routes

What a delay on this flight costs

8.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

At 1,554 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 365 flights under B6 1347 in the data flew DCA to SJU. 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. 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 B6 1347

For a booking, read B6 1347 as 74.9% on time with 1.10% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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