Flight number record
OO 4288
SkyWest Airlines · Iron Mountain to Minneapolis
- Route
- IMT → MSP
- Departs
- 11:00
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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−. About seven flights in ten arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about 2.5 hours behind schedule. That rests on 363 flights, with a median arrival 11 minutes early.
The national on-time rate over the same period is 77.3%, so OO 4288 runs 4 points behind the country as a whole. Across a thousand flights that is about 44 extra late arrivals.
Key figures
On time
72.9%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
148 min
Across delayed arrivals only, not all flights
Cancelled
3.31%
National rate is 1.89%
1 hour+ late
19.7%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 19.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 99 of 363 flights, with 11:10 (83 flights) next.
- Departs 11:0099 flights27.3%
- Departs 11:1083 flights22.9%
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 11:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4288 runs 5 points worse at 72.9%. 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 4288 next to IMT to MSP
Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4288thin sample | 363 | 72.9% | 148 min | 3.31% | C− |
| All SkyWest Airlines on IMT–MSPthin sample | 363 | 72.9% | 148 min | 3.31% | C− |
| All carriers on IMT–MSPthin sample | 363 | 72.9% | 148 min | 3.31% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 83.3% on time and its weakest Jan–Mar 2026 at 61.9%, a swing of 21 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 flights83.3%
- Oct–Dec 202590 flights68.6%
- Jan–Mar 202690 flights61.9%
- Apr–Jun 202691 flights77.8%
- Jul–Sep 202662 flights81.7%
Scale runs 55% to 90%.
By weekday, OO 4288 did best on Thursday at 83.7% on time and worst on Tuesday at 64.7%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4288 runs when it is late
OO 4288 often beats the schedule: 147 of 350 completed flights, 42%, arrived 15 minutes or more early. When OO 4288 is late it tends to be very late: 69 of its 95 late arrivals were an hour or more behind, and 43 were two hours or more.
- 15+ min early147 flights42.0%
- Within 15 min108 flights30.9%
- 15–29 min late8 flights2.3%
- 30–59 min late18 flights5.1%
- 1–2 hours late26 flights7.4%
- 2+ hours late43 flights12.3%
Scale runs 0% to 100%.
Share of 350 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 98 departures that left 15 minutes late or more, only 7 made it up before arrival. Only 4 left on time and still arrived late.
The worst days
Worst days for OO 4288
The latest arrival of the period was on 19 January 2026, 9 hours 39 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 January 2026 | 9 hours 39 minutes | Extreme weather |
| 21 November 2025 | 8 hours 30 minutes | Carrier |
| 7 March 2026 | 8 hours 23 minutes | Carrier |
| 18 December 2025 | 8 hours 1 minute | Carrier |
| 19 February 2026 | 7 hours 49 minutes | Extreme weather |
Delay causes
Why OO 4288 runs late
Carrier accounts for 63% of the 14,000 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 34%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 34% 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 5.6 times the usual weather exposure. The split is drawn from 14,097 delay minutes reported on OO 4288.
Cancellations run at 3.31%, against 1.89% nationally. That is about 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
19.7% 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.
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: 3.31% of its 363 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.
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.