Carrier route record
OOSDF→DTW
SkyWest Airlines · Louisville to Detroit
- Flights
- 670
- Period
- September 2025 to August 2026
- Share of route
- 62%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SDF to DTW lands a B, about a point better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 2.2 hours on average. That rests on 670 flights, with a median arrival 10 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate SkyWest on SDF to DTW from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.6%
Arrivals under 15 minutes late, of 660 completed flights
Avg delay
134 min
Across delayed arrivals only, not all flights
Cancelled
1.49%
National rate is 1.89%
Whole route
82.7%
Every carrier on SDF to DTW, 1,089 flights
These figures cover 670 flights between September 2025 and August 2026. Beyond the headline rate, 11.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on SDF to DTW
SkyWest flew 670 of the 1,089 flights on SDF to DTW, most of the route. Its 78.6% on time is 4 points worse than the route as a whole, which runs 82.7%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Republic at 89.9% to Delta at 63.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 408 | 89.9% | 77 min | 0.25% | A+ |
| SkyWest Airlines (this page) | 670 | 78.6% | 134 min | 1.49% | B |
| Delta Air Linesthin sample | 11 | 63.6% | 114 min | 0.00% | D+ |
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.
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am334 flights85.5%
- 11am–2pm10 flights—
- 2pm–5pm189 flights77.4%
- 5pm–8pm137 flights62.7%
- 8pm–5am—
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 62.7% on time, against 85.5% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 334 flights scheduled in it.
Across the year
SkyWest on SDF to DTW through the year
December is the weak month at 54.5% on time, against 95.3% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. April was the busiest month here, with 86 flights.
Across the week, Saturday is the strongest day at 87.2% on time and Friday the weakest at 70.1%, a spread of 17 points.
Arrival by arrival
How late SkyWest on SDF to DTW runs when it is late
SkyWest on SDF to DTW often beats the schedule: 246 of 660 completed flights, 37%, arrived 15 minutes or more early. When SkyWest on SDF to DTW is late it tends to be very late: 75 of its 141 late arrivals were an hour or more behind, and 40 were two hours or more.
- 15+ min early246 flights37.3%
- Within 15 min273 flights41.4%
- 15–29 min late33 flights5.0%
- 30–59 min late33 flights5.0%
- 1–2 hours late35 flights5.3%
- 2+ hours late40 flights6.1%
Scale runs 0% to 100%.
Share of 660 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 144 departures that left 15 minutes late or more, only 10 made it up before arrival. Only 7 left on time and still arrived late.
The worst days
Worst days for SkyWest on SDF to DTW
The latest arrival of the period was on 17 February 2026, 45 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 February 2026 | 45 hours 38 minutes | Carrier |
| 16 March 2026 | 17 hours 35 minutes | Extreme weather |
| 30 April 2026 | 16 hours 12 minutes | Carrier |
| 30 November 2025 | 13 hours 25 minutes | Carrier |
| 17 May 2026 | 9 hours 51 minutes | Carrier |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 71% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 71%Carrier
- 21%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 21% 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 monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.6 times the usual weather exposure. The split is drawn from 18,888 reported delay minutes.
The largest share of delay minutes, 71%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 13,000 of the 19,000 delay minutes reported here.
Cancellations sit at 1.49% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
11.4% 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.
At 306 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg runs 78.0% on time across 670 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 670 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 SkyWest on SDF to DTW
Put together: treat all of this as provisional. 670 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 78.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 660 completed flights over 12 months sit behind that.
Related
Where to go next
- SDF to DTW, every carrier
- SkyWest on DTW to SDF, the return leg
- Republic Airways on SDF to DTW89.9%
- SkyWest Airlines network-wide record
- Detroit Metropolitan Wayne County (DTW) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- How often a connection fails at the major US hubs
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.