Flight number record
OO 4288
SkyWest Airlines · Iron Mountain to Minneapolis
- Route
- IMT → MSP
- Departs
- 11:00
- Flights
- 363
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4288, 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 4288 sits in the middle of the pack with a C−. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land about 2.6 hours behind schedule. That rests on 363 flights, with a median arrival 11 minutes early.
Key figures
On time
73.9%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
153 min
Across delayed arrivals only, not all flights
Cancelled
3.03%
National rate is 1.81%
1 hour+ late
18.5%
National rate is 8.1%
These figures cover 363 flights between July 2025 and June 2026. Beyond the headline rate, 18.5% 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 4288 flies
OO 4288 flies IMT to MSP without a single fixed slot. Its most common scheduled departure was 11:00, used on 120 of 363 flights, with 11:05 (71 flights) and 11:10 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 11:00120 flights33.1%
- Departs 11:0571 flights19.6%
- Departs 11:1048 flights13.2%
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 11:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4288 runs 5 points worse at 73.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
OO 4288 next to IMT to MSP
Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4288thin sample | 363 | 73.9% | 153 min | 3.03% | C− |
| All SkyWest Airlines on IMT–MSPthin sample | 363 | 73.9% | 153 min | 3.03% | C− |
| All carriers on IMT–MSPthin sample | 363 | 73.9% | 153 min | 3.03% | C− |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 4288 quarter by quarter
OO 4288 did not run the same all year. Its best quarter was Jul–Sep 2025 at 85.9% on time and its weakest Jan–Mar 2026 at 61.9%, a swing of 24 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 flights85.9%
- Oct–Dec 202590 flights68.6%
- Jan–Mar 202690 flights61.9%
- Apr–Jun 202691 flights77.8%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4288 did best on Thursday at 86.0% on time and worst on Saturday at 64.0%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 4288 runs late
One category carries most of the weight here. Carrier accounts for 65% of the 14,000 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.
- 65%Carrier
- 31%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 31% 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 5.1 times the usual weather exposure. The split is drawn from 14,097 delay minutes reported on OO 4288.
Cancellations run at 3.03%, against 1.81% nationally. That is roughly one flight in 30 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. 18.5% 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.
Every one of the 363 flights under OO 4288 in the data flew IMT to MSP. The number was not reused on any other city pair, which makes this a clean record of one route.
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.
What to do with this
Booking OO 4288
For a booking, the cancellation rate is the figure to plan around on OO 4288: 3.03% of its 363 scheduled flights did not operate. A late arrival costs about 2.6 hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- Minneapolis-St Paul International (MSP) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.