Flight number record

YX 4345

Republic Airways · New York to Richmond

Route: LGA → RIC
Departs: 21:29
Flights: 299
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4345, 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 4345 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 299 flights, with a median arrival 6 minutes early.

The national on-time rate over the same period is 77.6%, so YX 4345 runs 10 points behind the country as a whole. Across a thousand flights that is about 102 extra late arrivals.

On time

67.4%

Arrivals under 15 minutes late, of 267 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

10.70%

National rate is 1.81%

1 hour+ late

15.0%

National rate is 8.1%

These figures cover 299 flights between July 2025 and June 2026. Beyond the headline rate, 15.0% 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 4345 flies

YX 4345 flies LGA to RIC without a single fixed slot. Its most common scheduled departure was 21:29, used on 67 of 299 flights, with 20:29 (32 flights) and 20:26 (30 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:2967 flights22.4%
Departs 20:2932 flights10.7%
Departs 20:2630 flights10.0%

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 21:29 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and YX 4345 runs 3 points worse at 67.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

YX 4345 next to LGA to RIC

Every carrier on LGA to RIC combined arrived on time 75.9% of the time across 2,262 flights, so YX 4345 is 9 points behind it. Republic flew 2,170 flights on the same city pair under all its flight numbers, including this one, and those ran 76.2% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 11 points.

YX 4345 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4345thin sample	299	67.4%	69 min	10.70%	C−
All Republic Airways on LGA–RIC	2,170	76.2%	65 min	6.36%	B−
All carriers on LGA–RIC	2,262	75.9%	66 min	6.19%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4345 quarter by quarter

YX 4345 did not run the same all year. Its best quarter was Jul–Sep 2025 at 79.4% on time and its weakest Oct–Dec 2025 at 57.7%, a swing of 22 points on roughly 75 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 202579 flights79.4%
Oct–Dec 202576 flights57.7%
Jan–Mar 202674 flights64.1%
Apr–Jun 202670 flights68.8%

Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, YX 4345 did best on Friday at 78.9% on time and worst on Wednesday at 54.8%. Each day rests on about 43 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 4345 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 59% of the 6,028 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
59%
National Airspace System
20%
Carrier
20%
Extreme weather
1%
Security
0%

59% 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 6,028 reported delay minutes here, that single category outweighs weather by 59 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 6,028 delay minutes reported on YX 4345.

Cancellations run at 10.70%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.0% 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 fourteen other city pairs in the data, including LGA to MYR (12), JFK to PIT (8) and PIT to JFK (8), but none flew often enough under YX 4345 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to RIC only.

One caution: this is a thin sample. 299 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 4345

For a booking, the cancellation rate is the figure to plan around on YX 4345: 10.70% of its 299 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