Flight number record

B6 1348

JetBlue Airways · San Juan to Washington

Route: SJU → DCA
Departs: 18:05
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 1348, check with JetBlue Airways.

B6 1348 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 365 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.6%, so B6 1348 runs 8 points behind the country as a whole. Across a thousand flights that is about 77 extra late arrivals.

On time

69.9%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

13.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 13.6% 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 1348 flies

B6 1348 flies SJU to DCA without a single fixed slot. Its most common scheduled departure was 18:05, used on 112 of 365 flights, with 18:00 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:05112 flights30.7%
Departs 18:0037 flights10.1%

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 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and B6 1348 runs level with that at 69.9%. 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 1348 next to SJU to DCA

Across its whole network JetBlue Airways managed 72.7%, which this flight trails by 3 points.

B6 1348 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 1348	365	69.9%	87 min	1.37%	C
All JetBlue Airways on SJU–DCA	365	69.9%	87 min	1.37%	C
All carriers on SJU–DCA	365	69.9%	87 min	1.37%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 1348 quarter by quarter

B6 1348 did not run the same all year. Its best quarter was Apr–Jun 2026 at 80.2% on time and its weakest Jan–Mar 2026 at 64.7%, a swing of 16 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 202592 flights64.8%
Oct–Dec 202592 flights69.6%
Jan–Mar 202690 flights64.7%
Apr–Jun 202691 flights80.2%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, B6 1348 did best on Friday at 84.3% on time and worst on Sunday at 49.0%. Each day rests on about 52 flights, so a gap of 35 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 1348 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 62% of the 9,380 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
62%
Carrier
23%
National Airspace System
14%
Extreme weather
1%

62% 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 9,380 reported delay minutes here, that single category outweighs weather by 62 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 9,380 delay minutes reported on B6 1348.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

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. 13.6% 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 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 1348 in the data flew SJU to DCA. 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 1348

For a booking, B6 1348 is a flight to put a long connection behind. 13.6% 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.

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