Flight number record
YX 4622
Republic Airways · Louisville to Chicago
- Route
- SDF → ORD
- Departs
- 07:00
- Flights
- 290
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 4622, 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 4622 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 290 flights, with a median arrival 15 minutes early.
Set against the rest of the country, YX 4622's record is 8 points better than the US average of 77.3%. That gap is worth roughly 83 fewer late arrivals for every thousand flights.
Key figures
On time
85.6%
Arrivals under 15 minutes late, of 285 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
1.72%
National rate is 1.89%
1 hour+ late
6.0%
National rate is 8.3%
These figures cover 290 flights between September 2025 and August 2026. The median arrival is 15 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When YX 4622 flies
YX 4622 flies SDF to ORD without a single fixed slot. Its most common scheduled departure was 07:00, used on 33 of 290 flights, with 06:51 (31 flights) and 06:33 (30 flights) next.
- Departs 07:0033 flights11.4%
- Departs 06:5131 flights10.7%
- Departs 06:3330 flights10.3%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and YX 4622 runs 4 points worse at 85.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
YX 4622 next to SDF to ORD
Every carrier on SDF to ORD combined arrived on time 79.3% of the time across 2,795 flights, so YX 4622 is 6 points ahead of it. Republic flew 1,853 flights on the same city pair under all its flight numbers, including this one, and those ran 82.8% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4622thin sample | 290 | 85.6% | 82 min | 1.72% | A |
| All Republic Airways on SDF–ORD | 1,853 | 82.8% | 68 min | 2.70% | B |
| All carriers on SDF–ORD | 2,795 | 79.3% | 79 min | 2.72% | B |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 4622 quarter by quarter
Quarter by quarter YX 4622 held fairly steady: 83.9% in Oct–Dec 2025, 83.1% in Jan–Mar 2026, 89.1% in Apr–Jun 2026 and 91.4% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202528 flights—
- Oct–Dec 202591 flights83.9%
- Jan–Mar 202689 flights83.1%
- Apr–Jun 202647 flights89.1%
- Jul–Sep 202635 flights91.4%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, YX 4622 did best on Thursday at 92.9% on time and worst on Sunday at 77.5%. Each day rests on about 41 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 4622 runs when it is late
YX 4622 often beats the schedule: 149 of 285 completed flights, 52%, arrived 15 minutes or more early. The 41 late arrivals split 11 under half an hour, 13 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early149 flights52.3%
- Within 15 min95 flights33.3%
- 15–29 min late11 flights3.9%
- 30–59 min late13 flights4.6%
- 1–2 hours late9 flights3.2%
- 2+ hours late8 flights2.8%
Scale runs 0% to 100%.
Share of 285 completed flights by arrival against schedule.
4 of 30 late departures made up the time and arrived on time, 13% of them. In the other direction, 15 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for YX 4622
The latest arrival of the period was on 24 January 2026, 8 hours 32 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in January 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 January 2026 | 8 hours 32 minutes | Late-arriving aircraft |
| 13 September 2025 | 4 hours 27 minutes | Extreme weather |
| 19 January 2026 | 4 hours 6 minutes | Late-arriving aircraft |
| 16 November 2025 | 3 hours 40 minutes | Carrier |
| 14 January 2026 | 2 hours 39 minutes | National Airspace System |
Delay causes
Why YX 4622 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,370 reported delay minutes.
- 37%National Airspace System
- 29%Carrier
- 21%Late-arriving aircraft
- 12%Extreme weather
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 3,370 delay minutes reported on YX 4622.
Cancellations sit at 1.72% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
The same number turns up on three other city pairs in the data, including ATL to MIA (6), MIA to ATL (6) and DCA to BHM (1), but none flew often enough under YX 4622 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SDF to ORD only.
One caution: this is a thin sample. 290 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 4622
For a booking, read YX 4622 as 85.6% on time with 1.72% cancelled over 290 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SDF to ORD, every carrier and departure
- ORD to SDF, the return direction
- Republic Airways 3422 on the same route90.1%
- Chicago O'Hare International (ORD) 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
- Worst months to fly in the US, ranked by the data
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.