Flight profile · Republic Airways
YX4376
New York (JFK) to Boston (BOS) · scheduled 8:29 AM – 9:55 AM
How YX4376 performs
253 operations, 2024-06-05 to 2026-06-30.
YX4376 arrived on time 93.3% of the time, against 75.1% for all JFK → BOS flights — this specific departure is 18.2 percentage points better than the route as a whole. Against Republic Airways’s own flights on this route it is 12.5 points better.
Source: US DOT Bureau of Transportation Statistics · 253 operations between 2024-06-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| YX4376 | 93.3% | 0.00% | -17 min | 1.6% | 253 |
| Republic Airways on JFK → BOS | 80.8% | 3.54% | -10 min | 8.4% | 7,943 |
| All JFK → BOS flights | 75.1% | 3.09% | -8 min | 11.3% | 16,852 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-05 to 2026-06-30
Other routes YX4376 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 |
|---|---|---|---|
| LGA→BNA New York to Nashville | 2024-11-05 – 2026-05-20 | 343 | 69.4% |
| ORD→SAV Chicago to Savannah | 2026-04-11 – 2026-05-16 | 6 | — |
| SAV→ORD Savannah to Chicago | 2026-04-11 – 2026-05-16 | 6 | — |
| ROC→MIA Rochester to Miami | 2026-03-14 – 2026-04-04 | 4 | — |
| ORD→OMA Chicago to Omaha | 2025-12-31 – 2025-12-31 | 1 | — |
| JFK→CVG New York to Cincinnati / Covington | 2025-05-10 – 2025-05-31 | 4 | — |
| MIA→BUF Miami to Buffalo | 2025-03-08 – 2025-03-29 | 4 | — |
| DCA→ORD Washington to Chicago | 2024-12-07 – 2024-12-14 | 2 | — |
| PVD→DCA Providence/Warwick to Washington | 2024-11-09 – 2024-11-30 | 4 | — |
| LGA→DCA New York to Washington | 2024-10-28 – 2024-11-04 | 5 | — |
| BOS→CMH Boston to Columbus | 2024-09-04 – 2024-10-06 | 28 | — |
| CMH→BOS Columbus to Boston | 2024-09-04 – 2024-10-06 | 28 | — |
| DCA→BTV Washington to Burlington | 2024-08-06 – 2024-09-03 | 25 | — |
| IND→ORD Indianapolis to Chicago | 2024-05-28 – 2024-05-28 | 1 | — |
| ORD→IND Chicago to Indianapolis | 2024-05-28 – 2024-05-28 | 1 | — |
| DCA→BHM Washington to Birmingham | 2024-04-06 – 2024-05-04 | 5 | — |
| ATL→DCA Atlanta to Washington | 2023-11-05 – 2024-04-03 | 134 | 92.5% |
| DCA→ATL Washington to Atlanta | 2023-11-06 – 2024-04-03 | 94 | 90.4% |
| ORF→JFK Norfolk to New York | 2023-10-29 – 2023-10-29 | 1 | — |
| RDU→DCA Raleigh–Durham to Washington | 2023-09-06 – 2023-10-04 | 25 | — |
| MIA→CMH Miami to Columbus | 2023-08-19 – 2023-09-02 | 3 | — |
| MCI→ORD Kansas City to Chicago | 2023-07-08 – 2023-08-12 | 6 | — |
| ORD→MCI Chicago to Kansas City | 2023-07-08 – 2023-08-12 | 6 | — |
| BHM→PHL Birmingham to Philadelphia | 2023-07-02 – 2023-07-03 | 2 | — |
| PHL→BHM Philadelphia to Birmingham | 2023-07-02 – 2023-07-03 | 2 | — |
Because the same number has served different journeys, the statistics above describe only the route YX4376 currently operates. Blending them would produce an average of two different flights.
Why YX4376 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, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for YX4376 on JFK → BOS. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on JFK → BOS
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| YX5765 | Republic Airways | 91.5% | 13 min early | 701 |
| YX5733 | Republic Airways | 87.1% | 10 min early | 753 |
| YX4659 | Republic Airways | 78.4% | 7 min early | 683 |
| B61318 | JetBlue | 67.2% | 1 min early | 710 |
| DL2639 | Delta Air Lines | 66.7% | 5 min early | 713 |
| B6318 | JetBlue | 61.8% | 0 min early | 738 |
| B61118 | JetBlue | 60.9% | 2 min late | 886 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 253 records of YX4376 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.