Flight number record

OO 4239

SkyWest Airlines · Minneapolis to Escanaba

Route: MSP → ESC
Departs: 08:55
Flights: 262
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 262 flights, with a median arrival 13 minutes early.

Set against the rest of the country, OO 4239's record is 8 points better than the US average of 77.6%. That gap is worth roughly 84 fewer late arrivals for every thousand flights.

On time

86.0%

Arrivals under 15 minutes late, of 250 completed flights

Avg delay

108 min

Across delayed arrivals only, not all flights

Cancelled

4.58%

National rate is 1.81%

1 hour+ late

8.4%

National rate is 8.1%

These figures cover 262 flights between July 2025 and June 2026. Beyond the headline rate, 8.4% 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 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 262 flights, with 08:50 (81 flights) and 09:00 (44 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:55115 flights43.9%
Departs 08:5081 flights30.9%
Departs 09:0044 flights16.8%

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 08:55 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4239 runs level with that at 86.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4239 next to MSP to ESC

Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 7 points.

OO 4239 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4239thin sample	262	86.0%	108 min	4.58%	A−
All SkyWest Airlines on MSP–ESCthin sample	262	86.0%	108 min	4.58%	A−
All carriers on MSP–ESCthin sample	262	86.0%	108 min	4.58%	A−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4239 quarter by quarter

Quarter by quarter OO 4239 held fairly steady: 90.9% in Jul–Sep 2025, 82.3% in Oct–Dec 2025, 86.4% in Jan–Mar 2026 and 84.1% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202566 flights90.9%
Oct–Dec 202566 flights82.3%
Jan–Mar 202664 flights86.4%
Apr–Jun 202666 flights84.1%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4239 did best on Thursday at 95.8% on time and worst on Sunday at 81.6%. Each day rests on about 37 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4239 runs late

One category carries most of the weight here. Carrier accounts for 58% of the 3,783 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
58%
National Airspace System
22%
Extreme weather
21%

Extreme weather accounts for 21% 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 3.3 times the usual weather exposure. The split is drawn from 3,783 delay minutes reported on OO 4239.

Cancellations run at 4.58%, against 1.81% nationally. That is roughly 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

8.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 (262 flights, 84.7% 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. 262 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 4239
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ESC to MSPthin sample	262	84.7%	113 min	4.96%	B−

What to do with this

Booking OO 4239

For a booking, the cancellation rate is the figure to plan around on OO 4239: 4.58% of its 262 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.

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