Flight number record
YX 3422
Republic Airways · Louisville to Chicago
- Route
- SDF → ORD
- Departs
- 07:00
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 3422, 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 3422 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 348 flights, with a median arrival 12 minutes early.
Set against the rest of the country, YX 3422's record is 13 points better than the US average of 77.3%. That gap is worth roughly 128 fewer late arrivals for every thousand flights.
Key figures
On time
90.1%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.15%
National rate is 1.89%
1 hour+ late
2.9%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. The median arrival is 12 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 3422 flies
YX 3422 flies SDF to ORD without a single fixed slot. Its most common scheduled departure was 07:00, used on 63 of 348 flights, with 07:20 (62 flights) and 07:15 (62 flights) next.
- Departs 07:0063 flights18.1%
- Departs 07:2062 flights17.8%
- Departs 07:1562 flights17.8%
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 3422 runs level with that at 90.1%. 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 3422 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 3422 is 11 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 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3422thin sample | 348 | 90.1% | 68 min | 1.15% | 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 3422 quarter by quarter
YX 3422 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Oct–Dec 2025 at 84.0%, a swing of 13 points on roughly 70 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 flights96.7%
- Oct–Dec 202576 flights84.0%
- Jan–Mar 202689 flights89.8%
- Apr–Jun 202691 flights90.0%
- Jul–Sep 202662 flights95.1%
Scale runs 75% to 100%.
By weekday, YX 3422 did best on Thursday at 96.0% on time and worst on Saturday at 78.0%. Each day rests on about 50 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 3422 runs when it is late
YX 3422 often beats the schedule: 134 of 344 completed flights, 39%, arrived 15 minutes or more early. The 34 late arrivals split 13 under half an hour, 11 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early134 flights39.0%
- Within 15 min176 flights51.2%
- 15–29 min late13 flights3.8%
- 30–59 min late11 flights3.2%
- 1–2 hours late4 flights1.2%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
A late pushback is often recovered here: of 21 departures that left 15 minutes late or more, 7 still arrived on time. In the other direction, 20 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 3422
The latest arrival of the period was on 13 September 2025, 4 hours 48 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 September 2025 | 4 hours 48 minutes | Extreme weather |
| 14 April 2026 | 3 hours 18 minutes | National Airspace System |
| 7 March 2026 | 3 hours 8 minutes | Carrier |
| 30 August 2026 | 3 hours | National Airspace System |
| 24 May 2026 | 2 hours 57 minutes | National Airspace System |
Delay causes
Why YX 3422 runs late
National Airspace System accounts for 61% of the 2,297 delay minutes carriers reported here, and the remaining four split what is left.
- 61%National Airspace System
- 25%Carrier
- 14%Extreme weather
Extreme weather accounts for 14% 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 2.2 times the usual weather exposure. The split is drawn from 2,297 delay minutes reported on YX 3422.
Cancellations sit at 1.15% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The same number turns up on three other city pairs in the data, including ORD to CLE (70), DTW to IAD (16) and BTV to IAD (1), but none flew often enough under YX 3422 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. 348 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 3422
For a booking, YX 3422 has one of the better records a US domestic flight can show: 90.1% on time and 1.15% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SDF to ORD, every carrier and departure
- ORD to SDF, the return direction
- Republic Airways 4622 on the same route85.6%
- 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.