Flight number record
B6 1348
JetBlue Airways · San Juan to Washington
- Route
- SJU → DCA
- Departs
- 18:05
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. The late ones land an hour and a half behind schedule. That rests on 364 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so B6 1348 runs 8 points behind the country as a whole. Across a thousand flights that is about 76 extra late arrivals.
Key figures
On time
69.7%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
100 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
16.0%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 16.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 63 of 364 flights, with 17:39 (46 flights) and 18:00 (37 flights) next.
- Departs 18:0563 flights17.3%
- Departs 17:3946 flights12.6%
- Departs 18:0037 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 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and B6 1348 runs level with that at 69.7%. 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 1348 next to SJU to DCA
Across its whole network JetBlue Airways managed 71.3%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1348thin sample | 364 | 69.7% | 100 min | 1.92% | C |
| All JetBlue Airways on SJU–DCAthin sample | 364 | 69.7% | 100 min | 1.92% | C |
| All carriers on SJU–DCAthin sample | 364 | 69.7% | 100 min | 1.92% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | 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 Jul–Sep 2026 at 57.6%, a swing of 23 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 202530 flights—
- Oct–Dec 202592 flights69.6%
- Jan–Mar 202690 flights64.7%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202661 flights57.6%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, B6 1348 did best on Friday at 82.4% on time and worst on Sunday at 51.0%. Each day rests on about 52 flights, so a gap of 31 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 1348 runs when it is late
B6 1348 often beats the schedule: 95 of 356 completed flights, 27%, arrived 15 minutes or more early. When B6 1348 is late it tends to be very late: 57 of its 108 late arrivals were an hour or more behind, and 34 were two hours or more.
- 15+ min early95 flights26.7%
- Within 15 min153 flights43.0%
- 15–29 min late21 flights5.9%
- 30–59 min late30 flights8.4%
- 1–2 hours late23 flights6.5%
- 2+ hours late34 flights9.6%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
20 of 119 late departures made up the time and arrived on time, 17% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for B6 1348
The latest arrival of the period was on 4 March 2026, 7 hours 14 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 March 2026 | 7 hours 14 minutes | National Airspace System |
| 16 February 2026 | 5 hours 51 minutes | Late-arriving aircraft |
| 25 August 2026 | 5 hours 26 minutes | Late-arriving aircraft |
| 30 November 2025 | 5 hours 9 minutes | Late-arriving aircraft |
| 18 January 2026 | 5 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why B6 1348 runs late
Late-arriving aircraft accounts for 66% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Late-arriving aircraft
- 25%Carrier
- 8%National Airspace System
- 1%Extreme weather
66% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 66 to one. The split is drawn from 10,792 delay minutes reported on B6 1348.
Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
16.0% 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 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 364 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. 364 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. 16.0% 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
- Luis Munoz Marin International (SJU) delay statistics
- Ronald Reagan Washington National (DCA) 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.