Flight profile · Republic Airways
YX5733
New York (JFK) to Boston (BOS) · scheduled 9:50 AM – 11:10 AM
How YX5733 performs
784 operations, June 2024 – July 2026.
YX5733 arrived on time 86.6% of the time, against 74.8% for all JFK → BOS flights, so this departure is 11.8 percentage points better than the route as a whole. Against Republic Airways’ own flights on this route it is 6.2 points better.
Source: US DOT Bureau of Transportation Statistics · 784 operations, June 2024 – July 2026 · If YX5733 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How YX5733 compares to other flight numbers, not just to itself.
This flight runs unusually far ahead of the JFK → BOS route as a whole, better than 93% of 11,788 comparable flight numbers.
86.6% on time for this specific departure, against 74.8% for every JFK → BOS flight.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where YX5733 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| YX5733 | 86.6% | 0.89% | -10 min | 5.0% | 784 |
| Republic Airways on JFK → BOS | 80.4% | 3.70% | -10 min | 8.6% | 8,160 |
| All JFK → BOS flights | 74.8% | 3.33% | -8 min | 11.5% | 17,279 |
YX5733 has cancelled 0.89% of its scheduled departures (7 of 784), against 3.33% for all JFK → BOS flights — this specific departure cancels 2.4 percentage points less often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about YX5733 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why YX5733 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for YX5733 on JFK → BOS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies YX5733 comes in late, and what that does to the departure.
The aircraft flying YX5733 came in 15 or more minutes late on 8% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into JFK just before it, using the tail number in the DOT file, 759 of 777 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 |
|---|---|
| YX5733 | 8% |
| Network, same turn | 18% |
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 45 to 59 minutes. How often YX5733’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
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 June 2024 – July 2026
From pushback to gate
When it leaves JFK late, does that still matter by the time it reaches BOS?
YX5733 pushes back an average of 4.4 minutes late and reaches the gate at BOS an average of 0.5 minutes early. The 5.0 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. It spends 25.6 minutes on the taxiways at JFK, 1.1 minutes shorter than a typical JFK departure in the same hour.
On arrival at BOS, YX5733 spends 10.4 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 1.5 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 25,535 departures from JFK scheduled in the clock hour YX5733 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 YX5733’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves JFK
Part of any flight’s record belongs to the clock rather than to the flight. YX5733 has one departure time, so this is what that time is worth.
On-time arrival rate. 25,535 departures from JFK are scheduled in the 9 AM–10 AM hour over the period, against 351,635 across the whole day.
YX5733 is scheduled out of JFK at 9:50 AM, in the 9 AM–10 AM bank. Departures from JFK in that hour arrive on time 81.7% of the time against 77.0% across the airport’s whole day — the slot alone is worth 4.6 points better before anything about this particular flight is considered.
The two airport figures cover every departure from JFK 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 · June 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes YX5733 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 |
|---|---|---|---|
| BOS→DCA Boston to Washington | May 7, 2024 – June 6, 2024 | 31 | — |
| BOS→LGA Boston to New York | January 8, 2024 – May 6, 2024 | 112 | 89.1% |
| CHS→JFK Charleston to New York | December 16, 2023 – January 7, 2024 | 9 | — |
| JFK→CHS New York to Charleston | December 16, 2023 – January 7, 2024 | 9 | — |
| LGA→MKE New York to Milwaukee | November 5, 2023 – December 6, 2023 | 26 | — |
| MKE→LGA Milwaukee to New York | November 5, 2023 – December 6, 2023 | 26 | — |
| DCA→BNA Washington to Nashville | October 28, 2023 – November 4, 2023 | 8 | — |
| CMH→BOS Columbus to Boston | October 9–27, 2023 | 17 | — |
| ATL→HHH Atlanta to Hilton Head Island | September 5, 2023 – October 8, 2023 | 34 | — |
| DCA→BOS Washington to Boston | July 10, 2023 – September 4, 2023 | 49 | — |
Because the same number has served different journeys, the statistics above describe only the route YX5733 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.
23 min late
against a median of 10 min early
Percentiles over 784 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| YX5765 | Republic Airways | 91.3% | 13 min early | 732 |
| YX5733 this flight | Republic Airways | 86.6% | 10 min early | 784 |
| YX4659 | Republic Airways | 78.4% | 7 min early | 683 |
| DL2639 | Delta Air Lines | 66.3% | 5 min early | 744 |
| B61318 | JetBlue | 65.9% | 0 min early | 741 |
| B6318 | JetBlue | 61.8% | 0 min early | 738 |
| B61118 | JetBlue | 60.8% | 2 min late | 914 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. YX5733 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 784 records of YX5733 operating JFK → 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
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