Flight number record
YX 4672
Republic Airways · Washington to Louisville
- Route
- DCA → SDF
- Departs
- 19:45
- Flights
- 321
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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, 9 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 321 flights, with a median arrival 5 minutes early.
The national on-time rate over the same period is 77.3%, so YX 4672 runs 9 points behind the country as a whole. Across a thousand flights that is about 85 extra late arrivals.
Key figures
On time
68.8%
Arrivals under 15 minutes late, of 298 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
7.17%
National rate is 1.89%
1 hour+ late
12.4%
National rate is 8.3%
These figures cover 321 flights between September 2025 and August 2026. Beyond the headline rate, 12.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When YX 4672 flies
YX 4672 flies DCA to SDF without a single fixed slot. Its most common scheduled departure was 19:45, used on 126 of 321 flights, with 19:59 (56 flights) and 19:37 (46 flights) next.
- Departs 19:45126 flights39.3%
- Departs 19:5956 flights17.4%
- Departs 19:3746 flights14.3%
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 19:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and YX 4672 runs level with that at 68.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
YX 4672 next to DCA to SDF
Every carrier on DCA to SDF combined arrived on time 74.9% of the time across 1,027 flights, so YX 4672 is 6 points behind it. Across its whole network Republic Airways managed 78.1%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4672thin sample | 321 | 68.8% | 74 min | 7.17% | C− |
| All Republic Airways on DCA–SDF | 465 | 72.5% | 76 min | 5.38% | C− |
| All carriers on DCA–SDF | 1,027 | 74.9% | 68 min | 5.36% | C− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 4672 quarter by quarter
YX 4672 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jul–Sep 2026 at 45.5%, a swing of 38 points on roughly 64 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 202530 flights83.3%
- Oct–Dec 202592 flights69.3%
- Jan–Mar 202690 flights74.4%
- Apr–Jun 202647 flights76.7%
- Jul–Sep 202662 flights45.5%
Scale runs 35% to 90%.
By weekday, YX 4672 did best on Saturday at 81.8% on time and worst on Wednesday at 60.5%. Each day rests on about 46 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 4672 runs when it is late
YX 4672 often beats the schedule: 98 of 298 completed flights, 33%, arrived 15 minutes or more early. The 93 late arrivals split 28 under half an hour, 28 between 30 and 60 minutes, and 37 an hour or more.
- 15+ min early98 flights32.9%
- Within 15 min107 flights35.9%
- 15–29 min late28 flights9.4%
- 30–59 min late28 flights9.4%
- 1–2 hours late16 flights5.4%
- 2+ hours late21 flights7.0%
Scale runs 0% to 100%.
Share of 298 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 90 departures that left 15 minutes late or more, only 5 made it up before arrival. 8 flights left on time and still arrived late.
The worst days
Worst days for YX 4672
The latest arrival of the period was on 30 January 2026, 4 hours 40 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 January 2026 | 4 hours 40 minutes | Late-arriving aircraft |
| 30 November 2025 | 4 hours 19 minutes | Carrier |
| 4 September 2025 | 3 hours 56 minutes | Late-arriving aircraft |
| 11 December 2025 | 3 hours 28 minutes | Late-arriving aircraft |
| 28 July 2026 | 3 hours 18 minutes | Late-arriving aircraft |
Delay causes
Why YX 4672 runs late
Late-arriving aircraft accounts for 67% of the 6,831 delay minutes carriers reported here, and the remaining four split what is left.
- 67%Late-arriving aircraft
- 23%Carrier
- 8%National Airspace System
- 1%Extreme weather
67% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,831 reported delay minutes here, that single category outweighs weather by 59 to one. The split is drawn from 6,831 delay minutes reported on YX 4672.
Cancellations run at 7.17%, against 1.89% 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
12.4% 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 321 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. 321 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: 7.17% of its 321 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.
Related
Where to go next
- DCA to SDF, every carrier and departure
- SDF to DCA, the return direction
- Ronald Reagan Washington National (DCA) 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
- Why the first flight of the morning is statistically safest
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.