Flight number record

OO 4233

SkyWest Airlines · Minneapolis to Rhinelander

Route: MSP → RHI
Departs: 20:15
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4233, 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 4233 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 9 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 365 flights, with a median arrival 18 minutes early.

Set against the rest of the country, OO 4233's record is 9 points better than the US average of 77.6%. That gap is worth roughly 91 fewer late arrivals for every thousand flights.

On time

86.7%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

117 min

Across delayed arrivals only, not all flights

Cancelled

3.01%

National rate is 1.81%

1 hour+ late

5.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 18 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.

Schedule

When OO 4233 flies

OO 4233 flies MSP to RHI without a single fixed slot. Its most common scheduled departure was 20:15, used on 271 of 365 flights, with 17:55 (91 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:15271 flights74.2%
Departs 17:5591 flights24.9%

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 20:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 4233 runs 16 points better at 86.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 4233 next to MSP to RHI

Every carrier on MSP to RHI combined arrived on time 86.8% of the time across 724 flights, so OO 4233 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 8 points.

OO 4233 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4233	365	86.7%	117 min	3.01%	A−
All SkyWest Airlines on MSP–RHI	724	86.8%	97 min	2.49%	A
All carriers on MSP–RHI	724	86.8%	97 min	2.49%	A
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4233 quarter by quarter

Quarter by quarter OO 4233 held fairly steady: 92.3% in Jul–Sep 2025, 84.4% in Oct–Dec 2025, 84.5% in Jan–Mar 2026 and 85.4% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights92.3%
Oct–Dec 202592 flights84.4%
Jan–Mar 202690 flights84.5%
Apr–Jun 202691 flights85.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4233 did best on Saturday at 94.0% on time and worst on Sunday at 76.0%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4233 runs late

One category carries most of the weight here. Carrier accounts for 76% of the 5,478 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
76%
Extreme weather
20%
National Airspace System
4%

Extreme weather accounts for 20% 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 3.2 times the usual weather exposure. The split is drawn from 5,478 delay minutes reported on OO 4233.

Cancellations run at 3.01%, 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

5.6% 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.

Every one of the 365 flights under OO 4233 in the data flew MSP to RHI. 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. 365 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 4233

For a booking, the cancellation rate is the figure to plan around on OO 4233: 3.01% of its 365 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