Flight number record

YX 4672

Republic Airways · Washington to Louisville

Route: DCA → SDF
Departs: 19:59
Flights: 317
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4672, 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 4672 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 317 flights, with a median arrival 7 minutes early.

The national on-time rate over the same period is 77.6%, so YX 4672 runs 5 points behind the country as a whole. Across a thousand flights that is about 50 extra late arrivals.

On time

72.6%

Arrivals under 15 minutes late, of 288 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

8.83%

National rate is 1.81%

1 hour+ late

10.8%

National rate is 8.1%

These figures cover 317 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% 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 4672 flies

YX 4672 flies DCA to SDF without a single fixed slot. Its most common scheduled departure was 19:59, used on 86 of 317 flights, with 19:45 (73 flights) and 19:37 (46 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:5986 flights27.1%
Departs 19:4573 flights23.0%
Departs 19:3746 flights14.5%

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 19:59 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and YX 4672 runs 4 points better at 72.6%. 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 4672 next to DCA to SDF

Every carrier on DCA to SDF combined arrived on time 75.1% of the time across 1,031 flights, so YX 4672 is 3 points behind it. Across its whole network Republic Airways managed 78.5%, which this flight trails by 6 points.

YX 4672 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4672thin sample	317	72.6%	75 min	8.83%	C−
All Republic Airways on DCA–SDF	441	75.4%	79 min	6.80%	B−
All carriers on DCA–SDF	1,031	75.1%	68 min	6.50%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4672 quarter by quarter

Quarter by quarter YX 4672 held fairly steady: 72.0% in Jul–Sep 2025, 69.3% in Oct–Dec 2025, 74.4% in Jan–Mar 2026 and 76.7% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202588 flights72.0%
Oct–Dec 202592 flights69.3%
Jan–Mar 202690 flights74.4%
Apr–Jun 202647 flights76.7%

Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, YX 4672 did best on Saturday at 85.4% on time and worst on Wednesday at 60.0%. Each day rests on about 45 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 4672 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 71% of the 5,931 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
71%
Carrier
19%
National Airspace System
10%
Extreme weather
1%

71% 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 5,931 reported delay minutes here, that single category outweighs weather by 71 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 5,931 delay minutes reported on YX 4672.

Cancellations run at 8.83%, against 1.81% nationally. That is about one flight in twelve 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. 10.8% 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.

Every one of the 317 flights under YX 4672 in the data flew DCA to SDF. 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. 317 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 4672

For a booking, the cancellation rate is the figure to plan around on YX 4672: 8.83% of its 317 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