Flight profile · JetBlue
B61388
Los Angeles (LAX) to Boston (BOS) · scheduled 10:35 AM – 7:13 PM
How B61388 performs
648 operations, July 2023 – July 2026.
B61388 arrived on time 69.1% of the time, against 80.2% for all LAX → BOS flights, so this departure is 11.1 percentage points worse than the route as a whole. Against JetBlue’s own flights on this route it is 8.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 648 operations, July 2023 – July 2026 · If B61388 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where B61388 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| B61388 | 69.1% | 0.62% | -3 min | 12.5% | 648 |
| JetBlue on LAX → BOS | 77.4% | 0.78% | -8 min | 8.5% | 5,120 |
| All LAX → BOS flights | 80.2% | 0.82% | -8 min | 7.4% | 14,323 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why B61388 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
Share of the delay minutes US DOT attributed to each cause for B61388 on LAX → BOS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies B61388 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, B61388 pushed back an average of 41 minutes late; when it came in on time or early, an average of 8 minutes late.
Each departure is matched to the flight the same aircraft flew into LAX just before it, using the tail number in the DOT file, 596 of 645 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| B61388 | 20% | 55% | 18% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often B61388’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often B61388 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves LAX late, does that still matter by the time it reaches BOS?
B61388 pushes back an average of 19.0 minutes late and reaches the gate at BOS an average of 13.8 minutes late. The 5.2 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 19.2 minutes on the taxiways at LAX is about what any departure from the airport in that hour spends.
On arrival at BOS, B61388 spends 10.7 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.8 minutes longer than a typical BOS arrival (9.0 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached BOS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 40,609 departures from LAX scheduled in the clock hour B61388 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at BOS (440,886 flights), not just B61388’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves LAX
Part of any flight’s record belongs to the clock rather than to the flight. B61388 has one departure time, so this is what that time is worth.
On-time arrival rate. 40,609 departures from LAX are scheduled in the 10 AM–11 AM hour over the period, against 595,153 across the whole day.
B61388 is scheduled out of LAX at 10:35 AM, in the 10 AM–11 AM bank. Departures from LAX in that hour arrive on time 79.8% of the time against 81.4% across the airport’s whole day, so the hour B61388 leaves in is an ordinary one for LAX and explains nothing about its record either way.
The two airport figures cover every departure from LAX to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
Other routes B61388 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MCO→ORH Orlando to Worcester | March 30, 2025 – April 29, 2025 | 18 | — |
| MCO→EWR Orlando to Newark | December 18, 2024 | 1 | — |
| FLL→ALB Fort Lauderdale to Albany | November 21, 2024 – December 2, 2024 | 11 | — |
Because the same number has served different journeys, the statistics above describe only the route B61388 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
75 min late
against a median of 3 min early
B61388 has an average that understates its risk: a typical arrival is 3 min early, but the worst tenth are 78 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 648 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA2210 | United Airlines | 88.9% | 12 min early | 765 |
| AA2453 | American Airlines | 84.5% | 8 min early | 1,021 |
| UA1783 | United Airlines | 83.8% | 12 min early | 765 |
| DL507 | Delta Air Lines | 81.4% | 6 min early | 684 |
| B6288 | JetBlue | 80.9% | 10 min early | 1,052 |
| B6188 | JetBlue | 75.1% | 6 min early | 606 |
| DL437 | Delta Air Lines | 74.9% | 4 min early | 679 |
| B6988 | JetBlue | 74.7% | 8 min early | 987 |
| B61388 this flight | JetBlue | 69.1% | 3 min early | 648 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. B61388 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 648 records of B61388 operating LAX → BOS, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed