Flight number record

OO 4338

SkyWest Airlines · Pellston to Detroit

Route: PLN → DTW
Departs: 14:05
Flights: 336
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 earns a B−. 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 about 2.5 hours. That rests on 336 flights, with a median arrival 18 minutes early.

Set against the rest of the country, OO 4338's record is 7 points better than the US average of 77.6%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.

On time

84.7%

Arrivals under 15 minutes late, of 288 completed flights

Avg delay

150 min

Across delayed arrivals only, not all flights

Cancelled

14.29%

National rate is 1.81%

1 hour+ late

9.0%

National rate is 8.1%

These figures cover 336 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 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 14:20 (38 flights) and 14:01 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:0572 flights21.4%
Departs 14:2038 flights11.3%
Departs 14:0136 flights10.7%

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 14:05 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 4338 runs 12 points better at 84.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4338 next to PLN to DTW

Every carrier on PLN to DTW combined arrived on time 82.5% of the time across 660 flights, so OO 4338 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 6 points.

OO 4338 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4338thin sample	336	84.7%	150 min	14.29%	B−
All SkyWest Airlines on PLN–DTW	660	82.5%	123 min	14.09%	B−
All carriers on PLN–DTW	660	82.5%	123 min	14.09%	B−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	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 93.5% on time and its weakest Jan–Mar 2026 at 69.6%, a swing of 24 points on roughly 84 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 flights93.5%
Oct–Dec 202570 flights88.9%
Jan–Mar 202689 flights69.6%
Apr–Jun 202685 flights84.4%

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

By weekday, OO 4338 ranged from 79.4% on Tuesday to 90.7% on Friday. With about 48 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 4338 runs late

One category carries most of the weight here. Carrier accounts for 85% of the 6,582 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
85%
Extreme weather
13%
National Airspace System
2%

Extreme weather accounts for 13% 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 2.1 times the usual weather exposure. The split is drawn from 6,582 delay minutes reported on OO 4338.

Cancellations run at 14.29%, against 1.81% 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

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 4338 is not only a PLN to DTW flight. It also flew DTW to PLN (336 flights, 81.0% 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.

Other routes flown as OO 4338
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
DTW to PLNthin sample	336	81.0%	79 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 2.5 hours, 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