Flight number record

YX 4574

Republic Airways · New York to Greensboro

Route: LGA → GSO
Departs: 15:30
Flights: 274
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4574, 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 4574 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 274 flights, with a median arrival 2 minutes late.

The national on-time rate over the same period is 77.6%, so YX 4574 runs 12 points behind the country as a whole. Across a thousand flights that is about 121 extra late arrivals.

On time

65.5%

Arrivals under 15 minutes late, of 255 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

6.57%

National rate is 1.81%

1 hour+ late

15.3%

National rate is 8.1%

These figures cover 274 flights between July 2025 and June 2026. Beyond the headline rate, 15.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When YX 4574 flies

YX 4574 flies LGA to GSO without a single fixed slot. Its most common scheduled departure was 15:30, used on 46 of 274 flights, with 16:19 (46 flights) and 16:05 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:3046 flights16.8%
Departs 16:1946 flights16.8%
Departs 16:0543 flights15.7%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 15:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and YX 4574 runs 7 points worse at 65.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

YX 4574 next to LGA to GSO

Every carrier on LGA to GSO combined arrived on time 75.8% of the time across 1,807 flights, so YX 4574 is 10 points behind it. Republic flew 1,805 flights on the same city pair under all its flight numbers, including this one, and those ran 75.7% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 13 points.

YX 4574 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4574thin sample	274	65.5%	71 min	6.57%	C−
All Republic Airways on LGA–GSO	1,805	75.7%	69 min	6.15%	B−
All carriers on LGA–GSO	1,807	75.8%	69 min	6.14%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4574 quarter by quarter

YX 4574 did not run the same all year. Its best quarter was Jan–Mar 2026 at 70.7% on time and its weakest Oct–Dec 2025 at 60.5%, a swing of 10 points on roughly 91 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 202587 flights67.9%
Oct–Dec 202591 flights60.5%
Jan–Mar 202690 flights70.7%
Apr–Jun 20266 flights—

Scale runs 50% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, YX 4574 did best on Saturday at 73.5% on time and worst on Sunday at 52.8%. Each day rests on about 39 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 4574 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 55% of the 6,275 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
55%
National Airspace System
27%
Extreme weather
10%
Carrier
8%

55% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 6,275 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 6,275 delay minutes reported on YX 4574.

Cancellations run at 6.57%, against 1.81% nationally. That is about one flight in fifteen 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The same number turns up on three other city pairs in the data, including GSO to LGA (240), LGA to ATL (37) and PVD to DCA (24), but none flew often enough under YX 4574 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to GSO only.

One caution: this is a thin sample. 274 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 4574

For a booking, the cancellation rate is the figure to plan around on YX 4574: 6.57% of its 274 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures