Flight number record
YX 5733
Republic Airways · New York to Boston
- Route
- JFK → BOS
- Departs
- 09:50
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5733, 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 5733 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 364 flights, with a median arrival 8 minutes early.
Set against the rest of the country, YX 5733's record is 7 points better than the US average of 77.3%. That gap is worth roughly 67 fewer late arrivals for every thousand flights.
Key figures
On time
84.0%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
2.20%
National rate is 1.89%
1 hour+ late
7.3%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 8 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 5733 flies
YX 5733 flies JFK to BOS without a single fixed slot. Its most common scheduled departure was 09:50, used on 185 of 364 flights, with 10:00 (64 flights) next.
- Departs 09:50185 flights50.8%
- Departs 10:0064 flights17.6%
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 09:50 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and YX 5733 runs level with that at 84.0%. 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 5733 next to JFK to BOS
Every carrier on JFK to BOS combined arrived on time 72.1% of the time across 5,615 flights, so YX 5733 is 12 points ahead of it. Republic flew 2,858 flights on the same city pair under all its flight numbers, including this one, and those ran 75.8% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5733thin sample | 364 | 84.0% | 84 min | 2.20% | B |
| All Republic Airways on JFK–BOS | 2,858 | 75.8% | 77 min | 5.14% | B− |
| All carriers on JFK–BOS | 5,615 | 72.1% | 79 min | 5.02% | C− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 5733 quarter by quarter
YX 5733 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.3% on time and its weakest Jul–Sep 2026 at 76.7%, 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 flights83.3%
- Oct–Dec 202591 flights86.7%
- Jan–Mar 202690 flights77.6%
- Apr–Jun 202691 flights92.3%
- Jul–Sep 202662 flights76.7%
Scale runs 70% to 100%.
By weekday, YX 5733 did best on Wednesday at 92.3% on time and worst on Saturday at 73.1%. 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 YX 5733 runs when it is late
YX 5733 often beats the schedule: 104 of 356 completed flights, 29%, arrived 15 minutes or more early. The 57 late arrivals split 17 under half an hour, 14 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early104 flights29.2%
- Within 15 min195 flights54.8%
- 15–29 min late17 flights4.8%
- 30–59 min late14 flights3.9%
- 1–2 hours late13 flights3.7%
- 2+ hours late13 flights3.7%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 47 departures that left 15 minutes late or more, only 5 made it up before arrival. 15 flights left on time and still arrived late.
The worst days
Worst days for YX 5733
The latest arrival of the period was on 7 June 2026, 5 hours 42 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 June 2026 | 5 hours 42 minutes | National Airspace System |
| 1 September 2025 | 4 hours 51 minutes | Carrier |
| 29 July 2026 | 4 hours 38 minutes | Carrier |
| 19 February 2026 | 4 hours 13 minutes | Late-arriving aircraft |
| 27 August 2026 | 3 hours 59 minutes | Carrier |
Delay causes
Why YX 5733 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 4,800 reported delay minutes.
- 41%Carrier
- 29%Late-arriving aircraft
- 29%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,964 of the 4,800 delay minutes reported here. The split is drawn from 4,800 delay minutes reported on YX 5733.
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
7.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
Every one of the 364 flights under YX 5733 in the data flew JFK to BOS. 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 5733
For a booking, read YX 5733 as 84.0% 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
- JFK to BOS, every carrier and departure
- BOS to JFK, the return direction
- JetBlue Airways 1118 on the same route62.0%
- Delta Air Lines 2639 on the same route68.2%
- Republic Airways 5765 on the same route91.1%
- JetBlue Airways 618 on the same route56.0%
- Republic Airways 5798 on the same route60.8%
- JetBlue Airways 418 on the same route74.4%
- John F. Kennedy International (JFK) delay statistics
- Boston Logan International (BOS) 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.