Flight number record

OO 4176

SkyWest Airlines · Appleton to Detroit

Route: ATW → DTW
Departs: 07:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 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 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 4176's record is 7 points better than the US average of 77.6%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.

On time

85.0%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

109 min

Across delayed arrivals only, not all flights

Cancelled

1.64%

National rate is 1.81%

1 hour+ late

8.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 8.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:00269 flights73.7%
Departs 06:4538 flights10.4%

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 OO 4176 runs 4 points worse at 85.0%. 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

OO 4176 next to ATW to DTW

Every carrier on ATW to DTW combined arrived on time 78.7% of the time across 1,063 flights, so OO 4176 is 6 points ahead of it. SkyWest flew 995 flights on the same city pair under all its flight numbers, including this one, and those ran 78.2% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 6 points.

OO 4176 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4176	365	85.0%	109 min	1.64%	A
All SkyWest Airlines on ATW–DTW	995	78.2%	106 min	1.51%	B
All carriers on ATW–DTW	1,063	78.7%	105 min	1.41%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4176 quarter by quarter

OO 4176 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.5% on time and its weakest Jan–Mar 2026 at 68.2%, a swing of 26 points on roughly 91 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 202592 flights93.4%
Oct–Dec 202592 flights82.6%
Jan–Mar 202690 flights68.2%
Apr–Jun 202691 flights94.5%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4176 ranged from 78.8% on Thursday to 90.4% on Tuesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 4176 runs late

One category carries most of the weight here. Carrier accounts for 74% of the 5,858 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
74%
Extreme weather
18%
National Airspace System
8%

Extreme weather accounts for 18% 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 2.9 times the usual weather exposure. The split is drawn from 5,858 delay minutes reported on OO 4176.

Cancellations sit at 1.64% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

8.6% 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 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 85.0% on time with 1.64% cancelled over 365 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 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures