Flight number record
OO 4239
SkyWest Airlines · Minneapolis to Escanaba
- Route
- MSP → ESC
- Departs
- 08:55
- Flights
- 265
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4239, 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 4239 earns an A−. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 265 flights, with a median arrival 15 minutes early.
Set against the rest of the country, OO 4239's record is 8 points better than the US average of 77.3%. That gap is worth roughly 84 fewer late arrivals for every thousand flights.
Key figures
On time
85.7%
Arrivals under 15 minutes late, of 252 completed flights
Avg delay
103 min
Across delayed arrivals only, not all flights
Cancelled
4.91%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 265 flights between September 2025 and August 2026. The median arrival is 15 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When OO 4239 flies
OO 4239 flies MSP to ESC without a single fixed slot. Its most common scheduled departure was 08:55, used on 115 of 265 flights, with 09:00 (89 flights) and 08:50 (61 flights) next.
- Departs 08:55115 flights43.4%
- Departs 09:0089 flights33.6%
- Departs 08:5061 flights23.0%
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 08:55 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4239 runs level with that at 85.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 4239 next to MSP to ESC
Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4239thin sample | 265 | 85.7% | 103 min | 4.91% | A− |
| All SkyWest Airlines on MSP–ESCthin sample | 265 | 85.7% | 103 min | 4.91% | A− |
| All carriers on MSP–ESCthin sample | 265 | 85.7% | 103 min | 4.91% | A− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4239 quarter by quarter
Quarter by quarter OO 4239 held fairly steady: 82.3% in Oct–Dec 2025, 86.4% in Jan–Mar 2026, 84.1% in Apr–Jun 2026 and 88.9% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202523 flights—
- Oct–Dec 202566 flights82.3%
- Jan–Mar 202664 flights86.4%
- Apr–Jun 202666 flights84.1%
- Jul–Sep 202646 flights88.9%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4239 did best on Thursday at 95.7% on time and worst on Friday at 79.6%. Each day rests on about 38 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4239 runs when it is late
OO 4239 often beats the schedule: 127 of 252 completed flights, 50%, arrived 15 minutes or more early. When OO 4239 is late it tends to be very late: 20 of its 36 late arrivals were an hour or more behind, and 13 were two hours or more.
- 15+ min early127 flights50.4%
- Within 15 min89 flights35.3%
- 15–29 min late10 flights4.0%
- 30–59 min late6 flights2.4%
- 1–2 hours late7 flights2.8%
- 2+ hours late13 flights5.2%
Scale runs 0% to 100%.
Share of 252 completed flights by arrival against schedule.
4 of 33 late departures made up the time and arrived on time, 12% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for OO 4239
The latest arrival of the period was on 18 January 2026, 7 hours 10 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in January 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 January 2026 | 7 hours 10 minutes | Extreme weather |
| 11 January 2026 | 6 hours 28 minutes | National Airspace System |
| 1 December 2025 | 3 hours 26 minutes | Carrier |
| 20 February 2026 | 3 hours 24 minutes | Carrier |
| 25 January 2026 | 3 hours 23 minutes | Carrier |
Delay causes
Why OO 4239 runs late
Carrier accounts for 60% of the 3,703 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 22%National Airspace System
- 18%Extreme weather
Extreme weather accounts for 18% 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 3.1 times the usual weather exposure. The split is drawn from 3,703 delay minutes reported on OO 4239.
Cancellations run at 4.91%, against 1.89% nationally. That is about one flight in twenty 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
7.9% 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 close to two hours, which a normal layover absorbs.
OO 4239 is not only a MSP to ESC flight. It also flew ESC to MSP (265 flights, 83.7% 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. 265 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 |
|---|---|---|---|---|---|
| ESC to MSPthin sample | 265 | 83.7% | 120 min | 5.28% | B− |
What to do with this
Booking OO 4239
For a booking, the cancellation rate is the figure to plan around on OO 4239: 4.91% of its 265 scheduled flights did not operate. A late arrival costs close to two 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.