Flight number record

OO 4274

SkyWest Airlines · Detroit to Alpena

Route: DTW → APN
Departs: 08:35
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4274, 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 4274 lands a B−, 4 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 363 flights, with a median arrival 13 minutes early.

Set against the rest of the country, OO 4274's record is 4 points better than the US average of 77.6%. That gap is worth roughly 44 fewer late arrivals for every thousand flights.

On time

82.0%

Arrivals under 15 minutes late, of 344 completed flights

Avg delay

89 min

Across delayed arrivals only, not all flights

Cancelled

4.68%

National rate is 1.81%

1 hour+ late

9.0%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. Beyond the headline rate, 9.0% 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 4274 flies

OO 4274 flies DTW to APN without a single fixed slot. Its most common scheduled departure was 08:35, used on 73 of 363 flights, with 08:40 (61 flights) and 08:25 (58 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:3573 flights20.1%
Departs 08:4061 flights16.8%
Departs 08:2558 flights16.0%

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 08:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4274 runs 2 points worse at 82.0%. 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 4274 next to DTW to APN

Every carrier on DTW to APN combined arrived on time 82.7% of the time across 628 flights, so OO 4274 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 3 points.

OO 4274 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4274thin sample	363	82.0%	89 min	4.68%	B−
All SkyWest Airlines on DTW–APN	628	82.7%	84 min	4.62%	B−
All carriers on DTW–APN	628	82.7%	84 min	4.62%	B−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4274 quarter by quarter

OO 4274 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.4% on time and its weakest Jan–Mar 2026 at 65.4%, a swing of 28 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 202591 flights82.4%
Jan–Mar 202689 flights65.4%
Apr–Jun 202691 flights84.4%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4274 ranged from 78.8% on Saturday to 87.5% on Friday. With about 52 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 4274 runs late

One category carries most of the weight here. Carrier accounts for 75% of the 5,543 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
75%
Extreme weather
20%
National Airspace System
5%

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 3.2 times the usual weather exposure. The split is drawn from 5,543 delay minutes reported on OO 4274.

Cancellations run at 4.68%, against 1.81% nationally. That is about one flight in twenty cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

OO 4274 is not only a DTW to APN flight. It also flew APN to DTW (363 flights, 83.8% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 363 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.

Other routes flown as OO 4274
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
APN to DTWthin sample	363	83.8%	125 min	4.96%	B−

What to do with this

Booking OO 4274

For a booking, the cancellation rate is the figure to plan around on OO 4274: 4.68% of its 363 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.

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