Flight number record
B6 1347
JetBlue Airways · Washington to San Juan
- Route
- DCA → SJU
- Departs
- 08:00
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 364 flights, with a median arrival 7 minutes early.
The national on-time rate over the same period is 77.3%, so B6 1347 runs 5 points behind the country as a whole. Across a thousand flights that is about 48 extra late arrivals.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.65%
National rate is 1.89%
1 hour+ late
10.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 10.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 233 of 364 flights.
- Departs 08:00233 flights64.0%
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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and B6 1347 runs 11 points worse at 72.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
B6 1347 next to DCA to SJU
Across its whole network JetBlue Airways managed 71.3%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1347thin sample | 364 | 72.5% | 73 min | 1.65% | C |
| All JetBlue Airways on DCA–SJUthin sample | 364 | 72.5% | 73 min | 1.65% | C |
| All carriers on DCA–SJUthin sample | 364 | 72.5% | 73 min | 1.65% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 1347 quarter by quarter
Quarter by quarter B6 1347 held fairly steady: 73.3% in Jul–Sep 2025, 74.7% in Oct–Dec 2025, 71.8% in Jan–Mar 2026, 74.4% in Apr–Jun 2026 and 66.7% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights73.3%
- Oct–Dec 202592 flights74.7%
- Jan–Mar 202690 flights71.8%
- Apr–Jun 202691 flights74.4%
- Jul–Sep 202661 flights66.7%
Scale runs 60% to 80%.
By weekday, B6 1347 did best on Monday at 80.4% on time and worst on Friday at 61.5%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 1347 runs when it is late
B6 1347 often beats the schedule: 112 of 353 completed flights, 32%, arrived 15 minutes or more early. The 97 late arrivals split 25 under half an hour, 35 between 30 and 60 minutes, and 37 an hour or more.
- 15+ min early112 flights31.7%
- Within 15 min144 flights40.8%
- 15–29 min late25 flights7.1%
- 30–59 min late35 flights9.9%
- 1–2 hours late19 flights5.4%
- 2+ hours late18 flights5.1%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 83 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 23 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 SJU.
The worst days
Worst days for B6 1347
The latest arrival of the period was on 3 February 2026, 5 hours 39 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across February, December, March, August and September, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 February 2026 | 5 hours 39 minutes | Late-arriving aircraft |
| 5 December 2025 | 5 hours 6 minutes | Extreme weather |
| 17 March 2026 | 5 hours 3 minutes | National Airspace System |
| 14 August 2026 | 3 hours 51 minutes | Carrier |
| 9 September 2025 | 3 hours 50 minutes | Late-arriving aircraft |
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 7,056 reported delay minutes.
- 38%National Airspace System
- 35%Carrier
- 17%Extreme weather
- 10%Late-arriving aircraft
Extreme weather accounts for 17% 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 2.9 times the usual weather exposure. The split is drawn from 7,056 delay minutes reported on B6 1347.
Cancellations sit at 1.65% against a national 1.89%, which is ordinary. Diversions add another 1.37%.
Connections and routes
What a delay on this flight costs
10.5% 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 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. 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 1347
For a booking, read B6 1347 as 72.5% on time with 1.65% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Ronald Reagan Washington National (DCA) delay statistics
- Luis Munoz Marin International (SJU) 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
- How often a connection fails at the major US hubs
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.