Flight number record
OO 4305
SkyWest Airlines · Minneapolis to Rhinelander
- Route
- MSP → RHI
- Departs
- 09:10
- Flights
- 359
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4305, 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 4305 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 359 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 4305's record is 10 points better than the US average of 77.3%. That gap is worth roughly 104 fewer late arrivals for every thousand flights.
Key figures
On time
87.7%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
1.95%
National rate is 1.89%
1 hour+ late
4.9%
National rate is 8.3%
These figures cover 359 flights between September 2025 and August 2026. The median arrival is 10 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 4305 flies
OO 4305 flies MSP to RHI without a single fixed slot. Its most common scheduled departure was 09:10, used on 177 of 359 flights, with 09:05 (110 flights) next.
- Departs 09:10177 flights49.3%
- Departs 09:05110 flights30.6%
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 09:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4305 runs 4 points better at 87.7%. 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 4305 next to MSP to RHI
Every carrier on MSP to RHI combined arrived on time 87.2% of the time across 724 flights, so OO 4305 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4305thin sample | 359 | 87.7% | 75 min | 1.95% | A |
| All SkyWest Airlines on MSP–RHI | 724 | 87.2% | 97 min | 2.35% | A |
| All carriers on MSP–RHI | 724 | 87.2% | 97 min | 2.35% | A |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4305 quarter by quarter
OO 4305 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.4% on time and its weakest Jan–Mar 2026 at 77.6%, a swing of 16 points on roughly 72 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 flights93.3%
- Oct–Dec 202587 flights87.7%
- Jan–Mar 202689 flights77.6%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights90.3%
Scale runs 70% to 100%.
By weekday, OO 4305 ranged from 83.7% on Wednesday to 91.8% on Tuesday. With about 51 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 4305 runs when it is late
OO 4305 often beats the schedule: 141 of 349 completed flights, 40%, arrived 15 minutes or more early. The 43 late arrivals split 10 under half an hour, 16 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early141 flights40.4%
- Within 15 min165 flights47.3%
- 15–29 min late10 flights2.9%
- 30–59 min late16 flights4.6%
- 1–2 hours late10 flights2.9%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 349 completed flights by arrival against schedule.
9 of 43 late departures made up the time and arrived on time, 21% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for OO 4305
The latest arrival of the period was on 7 March 2026, 6 hours 21 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 March 2026 | 6 hours 21 minutes | Carrier |
| 26 November 2025 | 3 hours 43 minutes | Extreme weather |
| 19 January 2026 | 3 hours 34 minutes | Carrier |
| 8 September 2025 | 3 hours 6 minutes | Carrier |
| 20 March 2026 | 3 hours 5 minutes | Extreme weather |
Delay causes
Why OO 4305 runs late
Carrier accounts for 60% of the 3,243 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 33%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 33% 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 5.4 times the usual weather exposure. The split is drawn from 3,243 delay minutes reported on OO 4305.
Cancellations sit at 1.95% against a national 1.89%, which is ordinary. Diversions add another 0.84%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
OO 4305 is not only a MSP to RHI flight. It also flew RHI to MSP (359 flights, 86.3% 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. 359 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 |
|---|---|---|---|---|---|
| RHI to MSPthin sample | 359 | 86.3% | 84 min | 2.51% | A |
What to do with this
Booking OO 4305
For a booking, read OO 4305 as 87.7% on time with 1.95% cancelled over 359 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- MSP to RHI, every carrier and departure
- RHI to MSP, the return direction
- SkyWest Airlines 4233 on the same route86.8%
- 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
- Worst months to fly in the US, ranked by the data
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.