Flight number record
OO 4242
SkyWest Airlines · Minneapolis to Sault Ste. Marie
- Route
- MSP → CIU
- Departs
- 12:45
- Flights
- 344
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4242, 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 4242 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 344 flights, with a median arrival 9 minutes early.
Key figures
On time
78.5%
Arrivals under 15 minutes late, of 321 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
4.07%
National rate is 1.89%
1 hour+ late
8.4%
National rate is 8.3%
These figures cover 344 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4242 flies
OO 4242 flies MSP to CIU without a single fixed slot. Its most common scheduled departure was 12:45, used on 116 of 344 flights, with 12:50 (87 flights) and 13:05 (54 flights) next.
- Departs 12:45116 flights33.7%
- Departs 12:5087 flights25.3%
- Departs 13:0554 flights15.7%
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 12:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4242 runs level with that at 78.5%. 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 4242 next to MSP to CIU
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 4242thin sample | 344 | 78.5% | 83 min | 4.07% | B− |
| All SkyWest Airlines on MSP–CIUthin sample | 344 | 78.5% | 83 min | 4.07% | B− |
| All carriers on MSP–CIUthin sample | 344 | 78.5% | 83 min | 4.07% | B− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4242 quarter by quarter
OO 4242 did not run the same all year. Its best quarter was Apr–Jun 2026 at 82.4% on time and its weakest Jan–Mar 2026 at 68.8%, a swing of 14 points on roughly 69 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 flights80.0%
- Oct–Dec 202592 flights80.9%
- Jan–Mar 202690 flights68.8%
- Apr–Jun 202678 flights82.4%
- Jul–Sep 202654 flights82.4%
Scale runs 60% to 90%.
By weekday, OO 4242 ranged from 71.4% on Sunday to 83.3% on Wednesday. With about 49 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 4242 runs when it is late
OO 4242 often beats the schedule: 108 of 321 completed flights, 34%, arrived 15 minutes or more early. The 69 late arrivals split 29 under half an hour, 13 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early108 flights33.6%
- Within 15 min144 flights44.9%
- 15–29 min late29 flights9.0%
- 30–59 min late13 flights4.0%
- 1–2 hours late11 flights3.4%
- 2+ hours late16 flights5.0%
Scale runs 0% to 100%.
Share of 321 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 51 departures that left 15 minutes late or more, only 6 made it up before arrival. In the other direction, 24 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at CIU.
The worst days
Worst days for OO 4242
The latest arrival of the period was on 28 December 2025, 8 hours 58 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 December 2025 | 8 hours 58 minutes | Extreme weather |
| 23 January 2026 | 5 hours 49 minutes | Extreme weather |
| 17 April 2026 | 5 hours 11 minutes | Carrier |
| 18 February 2026 | 5 hours 6 minutes | Extreme weather |
| 18 January 2026 | 4 hours 53 minutes | Carrier |
Delay causes
Why OO 4242 runs late
Carrier accounts for 54% of the 5,724 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 41%Extreme weather
- 5%National Airspace System
- 0%Security
Extreme weather accounts for 41% 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 6.8 times the usual weather exposure. The split is drawn from 5,724 delay minutes reported on OO 4242.
Cancellations run at 4.07%, against 1.89% nationally. That is about one flight in 25 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
8.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
Every one of the 344 flights under OO 4242 in the data flew MSP to CIU. 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. 344 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 4242
For a booking, the cancellation rate is the figure to plan around on OO 4242: 4.07% of its 344 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
- 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.