Flight number record
OO 4338
SkyWest Airlines · Pellston to Detroit
- Route
- PLN → DTW
- Departs
- 14:05
- Flights
- 336
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4338, 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 4338 lands a B−, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 2.2 hours on average. That rests on 336 flights, with a median arrival 19 minutes early.
Set against the rest of the country, OO 4338's record is 5 points better than the US average of 77.3%. That gap is worth roughly 53 fewer late arrivals for every thousand flights.
Key figures
On time
82.6%
Arrivals under 15 minutes late, of 288 completed flights
Avg delay
135 min
Across delayed arrivals only, not all flights
Cancelled
14.29%
National rate is 1.89%
1 hour+ late
9.0%
National rate is 8.3%
These figures cover 336 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4338 flies
OO 4338 flies PLN to DTW without a single fixed slot. Its most common scheduled departure was 14:05, used on 72 of 336 flights, with 10:31 (49 flights) and 10:30 (39 flights) next.
- Departs 14:0572 flights21.4%
- Departs 10:3149 flights14.6%
- Departs 10:3039 flights11.6%
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 14:05 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 4338 runs 11 points better at 82.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4338 next to PLN to DTW
Every carrier on PLN to DTW combined arrived on time 82.0% of the time across 659 flights, so OO 4338 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4338thin sample | 336 | 82.6% | 135 min | 14.29% | B− |
| All SkyWest Airlines on PLN–DTW | 659 | 82.0% | 118 min | 13.96% | B− |
| All carriers on PLN–DTW | 659 | 82.0% | 118 min | 13.96% | B− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4338 quarter by quarter
OO 4338 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 69.6%, a swing of 24 points on roughly 67 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 flights93.3%
- Oct–Dec 202570 flights88.9%
- Jan–Mar 202689 flights69.6%
- Apr–Jun 202685 flights84.4%
- Jul–Sep 202662 flights83.9%
Scale runs 60% to 100%.
By weekday, OO 4338 ranged from 78.6% on Sunday to 88.4% on Friday. With about 48 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 4338 runs when it is late
OO 4338 often beats the schedule: 166 of 288 completed flights, 58%, arrived 15 minutes or more early. When OO 4338 is late it tends to be very late: 26 of its 50 late arrivals were an hour or more behind, and 17 were two hours or more.
- 15+ min early166 flights57.6%
- Within 15 min72 flights25.0%
- 15–29 min late11 flights3.8%
- 30–59 min late13 flights4.5%
- 1–2 hours late9 flights3.1%
- 2+ hours late17 flights5.9%
Scale runs 0% to 100%.
Share of 288 completed flights by arrival against schedule.
8 of 57 late departures made up the time and arrived on time, 14% of them. Only 1 left on time and still arrived late.
The worst days
Worst days for OO 4338
The latest arrival of the period was on 5 February 2026, 23 hours 27 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 February 2026 | 23 hours 27 minutes | Carrier |
| 11 February 2026 | 18 hours 31 minutes | Carrier |
| 13 December 2025 | 3 hours 54 minutes | Carrier |
| 6 December 2025 | 3 hours 48 minutes | Carrier |
| 11 October 2025 | 3 hours 42 minutes | Carrier |
Delay causes
Why OO 4338 runs late
Carrier accounts for 88% of the 6,734 delay minutes carriers reported here, and the remaining four split what is left.
- 88%Carrier
- 10%Extreme weather
- 2%National Airspace System
The largest share of delay minutes, 88%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,944 of the 6,734 delay minutes reported here. The split is drawn from 6,734 delay minutes reported on OO 4338.
Cancellations run at 14.29%, against 1.89% nationally. That is about one flight in seven 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
9.0% 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.
OO 4338 is not only a PLN to DTW flight. It also flew DTW to PLN (336 flights, 77.2% 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. 336 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 |
|---|---|---|---|---|---|
| DTW to PLNthin sample | 336 | 77.2% | 74 min | 14.29% | B− |
What to do with this
Booking OO 4338
For a booking, the cancellation rate is the figure to plan around on OO 4338: 14.29% of its 336 scheduled flights did not operate. A late arrival costs about 2.2 hours, 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.