Flight number record

YX 4546

Republic Airways · New York to Washington

Route: JFK → DCA
Departs: 21:30
Flights: 265
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4546, 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 4546 earns a D−, which is as low as this site's scale goes for a reason. Only 56.7% of flights arrive inside the 15-minute window, 21 points worse than the national rate of 77.6%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 265 flights, with a median arrival 6 minutes late.

The national on-time rate over the same period is 77.6%, so YX 4546 runs 21 points behind the country as a whole. Across a thousand flights that is about 209 extra late arrivals.

On time

56.7%

Arrivals under 15 minutes late, of 231 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

12.45%

National rate is 1.81%

1 hour+ late

14.7%

National rate is 8.1%

These figures cover 265 flights between July 2025 and June 2026. Beyond the headline rate, 14.7% 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 4546 flies

YX 4546 flies JFK to DCA without a single fixed slot. Its most common scheduled departure was 21:30, used on 126 of 265 flights, with 20:00 (53 flights) and 20:25 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:30126 flights47.5%
Departs 20:0053 flights20.0%
Departs 20:2533 flights12.5%

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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and YX 4546 runs 14 points worse at 56.7%. 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 4546 next to JFK to DCA

Every carrier on JFK to DCA combined arrived on time 67.8% of the time across 2,528 flights, so YX 4546 is 11 points behind it. Republic flew 2,082 flights on the same city pair under all its flight numbers, including this one, and those ran 70.7% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 22 points.

YX 4546 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4546thin sample	265	56.7%	65 min	12.45%	D−
All Republic Airways on JFK–DCA	2,082	70.7%	67 min	5.38%	C−
All carriers on JFK–DCA	2,528	67.8%	71 min	5.34%	C−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4546 quarter by quarter

YX 4546 did not run the same all year. Its best quarter was Jul–Sep 2025 at 71.1% on time and its weakest Jan–Mar 2026 at 40.0%, a swing of 31 points on roughly 88 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 202592 flights71.1%
Oct–Dec 202582 flights63.5%
Jan–Mar 202685 flights40.0%
Apr–Jun 20266 flights—

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

By weekday, YX 4546 did best on Saturday at 71.4% on time and worst on Thursday at 34.4%. Each day rests on about 38 flights, so a gap of 37 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 4546 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 54% of the 6,525 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
54%
National Airspace System
38%
Carrier
7%
Extreme weather
0%

54% 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 6,525 reported delay minutes here, that single category outweighs weather by 54 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 6,525 delay minutes reported on YX 4546.

Cancellations run at 12.45%, against 1.81% nationally. That is about one flight in eight 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. 14.7% 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 LGA to CHS (38), RDU to LGA (22) and LGA to RDU (22), but none flew often enough under YX 4546 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to DCA only.

One caution: this is a thin sample. 265 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 4546

For a booking, the cancellation rate is the figure to plan around on YX 4546: 12.45% of its 265 scheduled flights did not operate. A late arrival costs about 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