Flight number record

YX 4622

Republic Airways · Louisville to Chicago

Route: SDF → ORD
Departs: 07:00
Flights: 291
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 291 flights, with a median arrival 16 minutes early.

Set against the rest of the country, YX 4622's record is 9 points better than the US average of 77.6%. That gap is worth roughly 87 fewer late arrivals for every thousand flights.

On time

86.3%

Arrivals under 15 minutes late, of 284 completed flights

Avg delay

86 min

Across delayed arrivals only, not all flights

Cancelled

2.41%

National rate is 1.81%

1 hour+ late

6.3%

National rate is 8.1%

These figures cover 291 flights between July 2025 and June 2026. The median arrival is 16 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.

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 37 of 291 flights, with 06:34 (32 flights) and 06:51 (30 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0037 flights12.7%
Departs 06:3432 flights11.0%
Departs 06:5130 flights10.3%

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 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 3 points worse at 86.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

YX 4622 next to SDF to ORD

Every carrier on SDF to ORD combined arrived on time 79.0% of the time across 2,807 flights, so YX 4622 is 7 points ahead of it. Republic flew 1,736 flights on the same city pair under all its flight numbers, including this one, and those ran 82.5% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 8 points.

YX 4622 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4622thin sample	291	86.3%	86 min	2.41%	A
All Republic Airways on SDF–ORD	1,736	82.5%	67 min	2.71%	B
All carriers on SDF–ORD	2,807	79.0%	78 min	2.81%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4622 quarter by quarter

Quarter by quarter YX 4622 held fairly steady: 91.9% in Jul–Sep 2025, 83.9% in Oct–Dec 2025, 83.1% in Jan–Mar 2026 and 89.1% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202564 flights91.9%
Oct–Dec 202591 flights83.9%
Jan–Mar 202689 flights83.1%
Apr–Jun 202647 flights89.1%

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 42 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

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 3,347 reported delay minutes.

National Airspace System
36%
Carrier
31%
Late-arriving aircraft
22%
Extreme weather
12%

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 1.9 times the usual weather exposure. The split is drawn from 3,347 delay minutes reported on YX 4622.

Cancellations sit at 2.41% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

6.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 DCA to BHM (23), ATL to MIA (6) and MIA to ATL (6), 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. 291 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 86.3% on time with 2.41% cancelled over 291 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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