Flight number record
YX 5746
Republic Airways · New York to Boston
- Route
- LGA → BOS
- Departs
- 19:00
- Flights
- 303
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5746, 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 5746 earns a D−, which is as low as this site's scale goes for a reason. Only 56.0% of flights arrive inside the 15-minute window, 21 points worse than the national rate of 77.3%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 303 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.3%, so YX 5746 runs 21 points behind the country as a whole. Across a thousand flights that is about 213 extra late arrivals.
Key figures
On time
56.0%
Arrivals under 15 minutes late, of 268 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
11.55%
National rate is 1.89%
1 hour+ late
20.9%
National rate is 8.3%
These figures cover 303 flights between September 2025 and August 2026. Beyond the headline rate, 20.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When YX 5746 flies
YX 5746 flies LGA to BOS without a single fixed slot. Its most common scheduled departure was 19:00, used on 183 of 303 flights, with 18:59 (120 flights) next.
- Departs 19:00183 flights60.4%
- Departs 18:59120 flights39.6%
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 19:00 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and YX 5746 runs 12 points worse at 56.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
YX 5746 next to LGA to BOS
Every carrier on LGA to BOS combined arrived on time 73.1% of the time across 7,443 flights, so YX 5746 is 17 points behind it. Republic flew 6,974 flights on the same city pair under all its flight numbers, including this one, and those ran 73.1% on time. Across its whole network Republic Airways managed 78.1%, which this flight trails by 22 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5746thin sample | 303 | 56.0% | 66 min | 11.55% | D− |
| All Republic Airways on LGA–BOS | 6,974 | 73.1% | 70 min | 6.28% | C− |
| All carriers on LGA–BOS | 7,443 | 73.1% | 70 min | 6.17% | C− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 5746 quarter by quarter
YX 5746 did not run the same all year. Its best quarter was Jul–Sep 2026 at 73.8% on time and its weakest Oct–Dec 2025 at 48.3%, a swing of 26 points on roughly 76 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 202526 flights—
- Oct–Dec 202567 flights48.3%
- Jan–Mar 202677 flights60.9%
- Apr–Jun 202680 flights56.6%
- Jul–Sep 202653 flights73.8%
Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5746 did best on Tuesday at 63.8% on time and worst on Monday at 47.6%. Each day rests on about 43 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 5746 runs when it is late
YX 5746 often beats the schedule: 71 of 268 completed flights, 26%, arrived 15 minutes or more early. The 118 late arrivals split 28 under half an hour, 34 between 30 and 60 minutes, and 56 an hour or more.
- 15+ min early71 flights26.5%
- Within 15 min79 flights29.5%
- 15–29 min late28 flights10.4%
- 30–59 min late34 flights12.7%
- 1–2 hours late46 flights17.2%
- 2+ hours late10 flights3.7%
Scale runs 0% to 100%.
Share of 268 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 108 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 14 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 BOS.
The worst days
Worst days for YX 5746
The latest arrival of the period was on 7 September 2025, 4 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 September 2025 | 4 hours 22 minutes | Carrier |
| 19 May 2026 | 4 hours 8 minutes | National Airspace System |
| 27 January 2026 | 3 hours 19 minutes | Carrier |
| 11 December 2025 | 2 hours 57 minutes | Carrier |
| 18 June 2026 | 2 hours 56 minutes | National Airspace System |
Delay causes
Why YX 5746 runs late
National Airspace System accounts for 45% of the 7,755 delay minutes carriers reported here, and the remaining four split what is left.
- 45%National Airspace System
- 29%Carrier
- 26%Late-arriving aircraft
- 0%Extreme weather
45% 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 3,469 minutes out of 7,755, against a national NAS share of 21%. The split is drawn from 7,755 delay minutes reported on YX 5746.
Cancellations run at 11.55%, against 1.89% nationally. That is about one flight in nine cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
20.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
Every one of the 303 flights under YX 5746 in the data flew LGA 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. 303 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 5746
For a booking, the cancellation rate is the figure to plan around on YX 5746: 11.55% of its 303 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LGA to BOS, every carrier and departure
- BOS to LGA, the return direction
- Republic Airways 5725 on the same route67.4%
- Republic Airways 5761 on the same route79.0%
- Republic Airways 5745 on the same route79.5%
- Republic Airways 5819 on the same route55.7%
- Republic Airways 5727 on the same route61.5%
- LaGuardia (LGA) 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
- How often a connection fails at the major US hubs
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.