Flight number record
OO 4335
SkyWest Airlines · Detroit to Pellston
- Route
- DTW → PLN
- Departs
- 15:55
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4335, 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 4335 lands a B−, about a point 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 317 flights, with a median arrival 10 minutes early.
Key figures
On time
78.3%
Arrivals under 15 minutes late, of 276 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
12.62%
National rate is 1.89%
1 hour+ late
12.3%
National rate is 8.3%
These figures cover 317 flights between September 2025 and August 2026. Beyond the headline rate, 12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4335 flies
OO 4335 is scheduled to leave Detroit (DTW) at 15:55 local time and reach Pellston (PLN) at 17:08. That slot held for 262 of the 317 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 15:55262 flights82.6%
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 15:55 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 4335 runs 6 points better at 78.3%. 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 4335 next to DTW to PLN
Every carrier on DTW to PLN combined arrived on time 77.6% of the time across 659 flights, so OO 4335 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4335thin sample | 317 | 78.3% | 95 min | 12.62% | B− |
| All SkyWest Airlines on DTW–PLN | 659 | 77.6% | 84 min | 13.96% | B− |
| All carriers on DTW–PLN | 659 | 77.6% | 84 min | 13.96% | B− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4335 quarter by quarter
OO 4335 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.5% on time and its weakest Jan–Mar 2026 at 60.0%, a swing of 29 points on roughly 63 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 flights86.7%
- Oct–Dec 202589 flights75.9%
- Jan–Mar 202665 flights60.0%
- Apr–Jun 202672 flights88.5%
- Jul–Sep 202661 flights83.6%
Scale runs 50% to 95%.
By weekday, OO 4335 did best on Wednesday at 86.7% on time and worst on Thursday at 71.4%. Each day rests on about 45 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4335 runs when it is late
OO 4335 often beats the schedule: 92 of 276 completed flights, 33%, arrived 15 minutes or more early. When OO 4335 is late it tends to be very late: 34 of its 60 late arrivals were an hour or more behind, and 20 were two hours or more.
- 15+ min early92 flights33.3%
- Within 15 min124 flights44.9%
- 15–29 min late10 flights3.6%
- 30–59 min late16 flights5.8%
- 1–2 hours late14 flights5.1%
- 2+ hours late20 flights7.2%
Scale runs 0% to 100%.
Share of 276 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 62 departures that left 15 minutes late or more, only 6 made it up before arrival. Only 4 left on time and still arrived late.
The worst days
Worst days for OO 4335
The latest arrival of the period was on 16 January 2026, 5 hours 51 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 |
|---|---|---|
| 16 January 2026 | 5 hours 51 minutes | Carrier |
| 1 December 2025 | 5 hours 31 minutes | Carrier |
| 26 November 2025 | 5 hours 26 minutes | National Airspace System |
| 7 March 2026 | 3 hours 22 minutes | Carrier |
| 25 January 2026 | 3 hours 12 minutes | Carrier |
Delay causes
Why OO 4335 runs late
Carrier accounts for 68% of the 5,715 delay minutes carriers reported here, and the remaining four split what is left.
- 68%Carrier
- 20%Extreme weather
- 13%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 5,715 delay minutes reported on OO 4335.
Cancellations run at 12.62%, against 1.89% nationally. That is about one flight in eight 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
12.3% 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 4335 is not only a DTW to PLN flight. It also flew PLN to DTW (317 flights, 81.2% 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. 317 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 |
|---|---|---|---|---|---|
| PLN to DTWthin sample | 317 | 81.2% | 102 min | 12.62% | B− |
What to do with this
Booking OO 4335
For a booking, the cancellation rate is the figure to plan around on OO 4335: 12.62% of its 317 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
- How often a connection fails at the major US hubs
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.