Flight number record
YX 5720
Republic Airways · Boston to New York
- Route
- BOS → JFK
- Departs
- 09:05
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5720, check with Republic Airways. Republic Airways flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
YX 5720 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 364 flights, with a median arrival 9 minutes early.
Set against the rest of the country, YX 5720's record is 8 points better than the US average of 77.3%. That gap is worth roughly 78 fewer late arrivals for every thousand flights.
Key figures
On time
85.1%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
2.20%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When YX 5720 flies
YX 5720 flies BOS to JFK without a single fixed slot. Its most common scheduled departure was 09:05, used on 173 of 364 flights, with 09:59 (108 flights) and 10:05 (38 flights) next.
- Departs 09:05173 flights47.5%
- Departs 09:59108 flights29.7%
- Departs 10:0538 flights10.4%
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 09:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and YX 5720 runs level with that at 85.1%. 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
YX 5720 next to BOS to JFK
Every carrier on BOS to JFK combined arrived on time 74.2% of the time across 5,614 flights, so YX 5720 is 11 points ahead of it. Republic flew 2,857 flights on the same city pair under all its flight numbers, including this one, and those ran 74.6% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5720thin sample | 364 | 85.1% | 49 min | 2.20% | A |
| All Republic Airways on BOS–JFK | 2,857 | 74.6% | 64 min | 5.99% | C− |
| All carriers on BOS–JFK | 5,614 | 74.2% | 71 min | 5.58% | C− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 5720 quarter by quarter
YX 5720 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 77.6%, a swing of 16 points on roughly 73 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 flights93.3%
- Oct–Dec 202591 flights86.7%
- Jan–Mar 202690 flights77.6%
- Apr–Jun 202691 flights91.1%
- Jul–Sep 202662 flights80.3%
Scale runs 70% to 100%.
By weekday, YX 5720 did best on Wednesday at 94.1% on time and worst on Tuesday at 80.0%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 5720 runs when it is late
YX 5720 often beats the schedule: 106 of 356 completed flights, 30%, arrived 15 minutes or more early. The 53 late arrivals split 26 under half an hour, 18 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early106 flights29.8%
- Within 15 min197 flights55.3%
- 15–29 min late26 flights7.3%
- 30–59 min late18 flights5.1%
- 1–2 hours late5 flights1.4%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
6 of 39 late departures made up the time and arrived on time, 15% of them. In the other direction, 20 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 JFK.
The worst days
Worst days for YX 5720
The latest arrival of the period was on 3 August 2026, 6 hours 34 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in January 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 August 2026 | 6 hours 34 minutes | National Airspace System |
| 27 January 2026 | 4 hours 40 minutes | Carrier |
| 14 December 2025 | 2 hours 52 minutes | National Airspace System |
| 19 January 2026 | 2 hours 14 minutes | National Airspace System |
| 3 January 2026 | 1 hour 43 minutes | Carrier |
Delay causes
Why YX 5720 runs late
National Airspace System accounts for 49% of the 2,614 delay minutes carriers reported here, and the remaining four split what is left.
- 49%National Airspace System
- 33%Carrier
- 17%Late-arriving aircraft
- 1%Extreme weather
49% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,272 minutes out of 2,614, against a national NAS share of 21%. The split is drawn from 2,614 delay minutes reported on YX 5720.
Cancellations sit at 2.20% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.5% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
Every one of the 364 flights under YX 5720 in the data flew BOS to JFK. 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 YX 5720
For a booking, read YX 5720 as 85.1% on time with 2.20% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to JFK, every carrier and departure
- JFK to BOS, the return direction
- JetBlue Airways 717 on the same route60.3%
- Delta Air Lines 2611 on the same route92.3%
- Republic Airways 5808 on the same route73.8%
- JetBlue Airways 1017 on the same route64.9%
- JetBlue Airways 517 on the same route66.0%
- Republic Airways 5814 on the same route63.2%
- Boston Logan International (BOS) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Republic Airways on-time record
- Every Republic Airways flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Republic 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.