Flight number record
OO 4176
SkyWest Airlines · Appleton to Detroit
- Route
- ATW → DTW
- Departs
- 07:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4176, 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 4176 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 4176's record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
105 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
8.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4176 flies
OO 4176 flies ATW to DTW without a single fixed slot. Its most common scheduled departure was 07:00, used on 269 of 365 flights, with 06:45 (38 flights) next.
- Departs 07:00269 flights73.7%
- Departs 06:4538 flights10.4%
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 OO 4176 runs 5 points worse at 84.4%. 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
OO 4176 next to ATW to DTW
Every carrier on ATW to DTW combined arrived on time 78.6% of the time across 1,042 flights, so OO 4176 is 6 points ahead of it. SkyWest flew 974 flights on the same city pair under all its flight numbers, including this one, and those ran 78.0% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4176 | 365 | 84.4% | 105 min | 1.64% | B |
| All SkyWest Airlines on ATW–DTW | 974 | 78.0% | 104 min | 1.54% | B |
| All carriers on ATW–DTW | 1,042 | 78.6% | 103 min | 1.44% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4176 quarter by quarter
OO 4176 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 68.2%, a swing of 29 points on roughly 73 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 202592 flights82.6%
- Jan–Mar 202690 flights68.2%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights88.5%
Scale runs 60% to 100%.
By weekday, OO 4176 did best on Tuesday at 92.3% on time and worst on Thursday at 76.9%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4176 runs when it is late
OO 4176 often beats the schedule: 128 of 359 completed flights, 36%, arrived 15 minutes or more early. When OO 4176 is late it tends to be very late: 32 of its 56 late arrivals were an hour or more behind, and 17 were two hours or more.
- 15+ min early128 flights35.7%
- Within 15 min175 flights48.7%
- 15–29 min late12 flights3.3%
- 30–59 min late12 flights3.3%
- 1–2 hours late15 flights4.2%
- 2+ hours late17 flights4.7%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
8 of 46 late departures made up the time and arrived on time, 17% of them. In the other direction, 18 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 DTW.
The worst days
Worst days for OO 4176
The latest arrival of the period was on 5 March 2026, 9 hours 7 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 March 2026 | 9 hours 7 minutes | Carrier |
| 25 July 2026 | 7 hours 37 minutes | Carrier |
| 17 March 2026 | 6 hours 34 minutes | Carrier |
| 2 June 2026 | 5 hours 22 minutes | Extreme weather |
| 12 March 2026 | 3 hours 58 minutes | Carrier |
Delay causes
Why OO 4176 runs late
Carrier accounts for 72% of the 5,871 delay minutes carriers reported here, and the remaining four split what is left.
- 72%Carrier
- 20%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 20% 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 3.3 times the usual weather exposure. The split is drawn from 5,871 delay minutes reported on OO 4176.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.9% 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 close to two hours, which a normal layover absorbs.
Every one of the 365 flights under OO 4176 in the data flew ATW to DTW. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 4176
For a booking, read OO 4176 as 84.4% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATW to DTW, every carrier and departure
- DTW to ATW, 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
- Worst months to fly in the US, ranked by the data
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.