Flight number record
OO 4274
SkyWest Airlines · Detroit to Alpena
- Route
- DTW → APN
- Departs
- 08:40
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 363 flights, with a median arrival 12 minutes early.
Set against the rest of the country, OO 4274's record is 4 points better than the US average of 77.3%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.
Key figures
On time
81.4%
Arrivals under 15 minutes late, of 345 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
4.68%
National rate is 1.89%
1 hour+ late
8.7%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4274 flies
OO 4274 flies DTW to APN without a single fixed slot. Its most common scheduled departure was 08:40, used on 123 of 363 flights, with 08:35 (73 flights) and 08:25 (58 flights) next.
- Departs 08:40123 flights33.9%
- Departs 08:3573 flights20.1%
- Departs 08:2558 flights16.0%
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 08:40 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4274 runs 3 points worse at 81.4%. 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 4274 next to DTW to APN
Every carrier on DTW to APN combined arrived on time 81.3% of the time across 632 flights, so OO 4274 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4274thin sample | 363 | 81.4% | 83 min | 4.68% | B− |
| All SkyWest Airlines on DTW–APN | 632 | 81.3% | 79 min | 4.43% | B− |
| All carriers on DTW–APN | 632 | 81.3% | 79 min | 4.43% | B− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 96.7% on time and its weakest Jan–Mar 2026 at 65.4%, a swing of 31 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 202591 flights82.4%
- Jan–Mar 202689 flights65.4%
- Apr–Jun 202691 flights84.4%
- Jul–Sep 202662 flights88.7%
Scale runs 55% to 100%.
By weekday, OO 4274 ranged from 78.0% on Thursday to 85.4% on Friday. With about 52 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 4274 runs when it is late
OO 4274 often beats the schedule: 144 of 345 completed flights, 42%, arrived 15 minutes or more early. The 64 late arrivals split 16 under half an hour, 18 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early144 flights41.7%
- Within 15 min137 flights39.7%
- 15–29 min late16 flights4.6%
- 30–59 min late18 flights5.2%
- 1–2 hours late15 flights4.3%
- 2+ hours late15 flights4.3%
Scale runs 0% to 100%.
Share of 345 completed flights by arrival against schedule.
8 of 53 late departures made up the time and arrived on time, 15% of them. In the other direction, 19 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 APN.
The worst days
Worst days for OO 4274
The latest arrival of the period was on 19 April 2026, 7 hours 14 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 |
|---|---|---|
| 19 April 2026 | 7 hours 14 minutes | Carrier |
| 6 December 2025 | 4 hours 59 minutes | Carrier |
| 17 February 2026 | 4 hours 42 minutes | Extreme weather |
| 11 October 2025 | 4 hours 9 minutes | Carrier |
| 7 October 2025 | 3 hours 11 minutes | Carrier |
Delay causes
Why OO 4274 runs late
Carrier accounts for 74% of the 5,300 delay minutes carriers reported here, and the remaining four split what is left.
- 74%Carrier
- 21%Extreme weather
- 4%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 quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.5 times the usual weather exposure. The split is drawn from 5,300 delay minutes reported on OO 4274.
Cancellations run at 4.68%, against 1.89% 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
8.7% 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 an hour and a half, which a normal layover absorbs.
OO 4274 is not only a DTW to APN flight. It also flew APN to DTW (363 flights, 82.6% 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| APN to DTWthin sample | 363 | 82.6% | 114 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.
Related
Where to go next
- 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
- What a cancellation rate actually tells you (and what it hides)
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.