Flight number record
OO 4013
SkyWest Airlines · Detroit to Lexington
- Route
- DTW → LEX
- Departs
- 19:55
- Flights
- 328
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4013, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 4013 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 328 flights, with a median arrival 4 minutes early.
Key figures
On time
74.1%
Arrivals under 15 minutes late, of 321 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
1.83%
National rate is 1.89%
1 hour+ late
12.8%
National rate is 8.3%
These figures cover 328 flights between September 2025 and August 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4013 flies
OO 4013 flies DTW to LEX without a single fixed slot. Its most common scheduled departure was 19:55, used on 80 of 328 flights, with 20:15 (76 flights) and 20:25 (36 flights) next.
- Departs 19:5580 flights24.4%
- Departs 20:1576 flights23.2%
- Departs 20:2536 flights11.0%
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 19:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 4013 runs 6 points better at 74.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 4013 next to DTW to LEX
Every carrier on DTW to LEX combined arrived on time 77.7% of the time across 787 flights, so OO 4013 is 4 points behind it. SkyWest flew 570 flights on the same city pair under all its flight numbers, including this one, and those ran 74.4% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4013thin sample | 328 | 74.1% | 101 min | 1.83% | C |
| All SkyWest Airlines on DTW–LEX | 570 | 74.4% | 101 min | 1.58% | C |
| All carriers on DTW–LEX | 787 | 77.7% | 95 min | 1.52% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4013 quarter by quarter
OO 4013 did not run the same all year. Its best quarter was Oct–Dec 2025 at 83.8% on time and its weakest Jan–Mar 2026 at 61.2%, a swing of 23 points on roughly 82 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 202524 flights—
- Oct–Dec 202577 flights83.8%
- Jan–Mar 202682 flights61.2%
- Apr–Jun 202688 flights78.2%
- Jul–Sep 202657 flights66.1%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4013 did best on Saturday at 87.9% on time and worst on Friday at 68.8%. Each day rests on about 47 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4013 runs when it is late
The 83 late arrivals split 14 under half an hour, 28 between 30 and 60 minutes, and 41 an hour or more.
- 15+ min early71 flights22.1%
- Within 15 min167 flights52.0%
- 15–29 min late14 flights4.4%
- 30–59 min late28 flights8.7%
- 1–2 hours late19 flights5.9%
- 2+ hours late22 flights6.9%
Scale runs 0% to 100%.
Share of 321 completed flights by arrival against schedule.
14 of 90 late departures made up the time and arrived on time, 16% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for OO 4013
The latest arrival of the period was on 30 January 2026, 12 hours 23 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 January 2026 | 12 hours 23 minutes | Carrier |
| 11 December 2025 | 10 hours 35 minutes | Carrier |
| 1 December 2025 | 10 hours 4 minutes | Extreme weather |
| 17 March 2026 | 4 hours 17 minutes | Carrier |
| 15 January 2026 | 3 hours 51 minutes | Extreme weather |
Delay causes
Why OO 4013 runs late
Carrier accounts for 69% of the 8,410 delay minutes carriers reported here, and the remaining four split what is left.
- 69%Carrier
- 23%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 23% 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 3.8 times the usual weather exposure. The split is drawn from 8,410 delay minutes reported on OO 4013.
Cancellations sit at 1.83% against a national 1.89%, which is ordinary. Diversions add another 0.30%.
Connections and routes
What a delay on this flight costs
12.8% 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.
The same number turns up on four other city pairs in the data, including MSP to OMA (16), DTW to MEM (3) and MEM to DTW (3), but none flew often enough under OO 4013 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to LEX only.
One caution: this is a thin sample. 328 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 OO 4013
For a booking, OO 4013 is a flight to put a long connection behind. 12.8% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- DTW to LEX, every carrier and departure
- LEX to DTW, the return direction
- Detroit Metropolitan Wayne County (DTW) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
A flight number here means SkyWest Airlines’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.