Flight number record
OO 3975
SkyWest Airlines · Appleton to Minneapolis
- Route
- ATW → MSP
- Departs
- 06:25
- Flights
- 286
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3975, 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 3975 lands a B, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 2.6 hours on average. That rests on 286 flights, with a median arrival 8 minutes early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 280 completed flights
Avg delay
154 min
Across delayed arrivals only, not all flights
Cancelled
1.75%
National rate is 1.89%
1 hour+ late
11.8%
National rate is 8.3%
These figures cover 286 flights between September 2025 and August 2026. Beyond the headline rate, 11.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 3975 flies
OO 3975 flies ATW to MSP without a single fixed slot. Its most common scheduled departure was 06:25, used on 65 of 286 flights, with 06:20 (49 flights) and 06:00 (40 flights) next.
- Departs 06:2565 flights22.7%
- Departs 06:2049 flights17.1%
- Departs 06:0040 flights14.0%
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 06:25 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 3975 runs 11 points worse at 77.9%. 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 3975 next to ATW to MSP
Every carrier on ATW to MSP combined arrived on time 74.4% of the time across 866 flights, so OO 3975 is 4 points ahead of it. 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 3975thin sample | 286 | 77.9% | 154 min | 1.75% | B |
| All SkyWest Airlines on ATW–MSP | 866 | 74.4% | 111 min | 1.96% | C |
| All carriers on ATW–MSP | 866 | 74.4% | 111 min | 1.96% | C |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3975 quarter by quarter
OO 3975 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jan–Mar 2026 at 74.1%, 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 flights90.0%
- Oct–Dec 202592 flights78.0%
- Jan–Mar 202690 flights74.1%
- Apr–Jun 202667 flights79.1%
- Jul–Sep 20267 flights—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 3975 did best on Saturday at 87.2% on time and worst on Sunday at 66.7%. Each day rests on about 41 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3975 runs when it is late
OO 3975 often beats the schedule: 110 of 280 completed flights, 39%, arrived 15 minutes or more early. When OO 3975 is late it tends to be very late: 33 of its 62 late arrivals were an hour or more behind, and 28 were two hours or more.
- 15+ min early110 flights39.3%
- Within 15 min108 flights38.6%
- 15–29 min late20 flights7.1%
- 30–59 min late9 flights3.2%
- 1–2 hours late5 flights1.8%
- 2+ hours late28 flights10.0%
Scale runs 0% to 100%.
Share of 280 completed flights by arrival against schedule.
6 of 50 late departures made up the time and arrived on time, 12% of them. In the other direction, 18 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 MSP.
The worst days
Worst days for OO 3975
The latest arrival of the period was on 9 March 2026, 14 hours 9 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 March 2026 | 14 hours 9 minutes | Carrier |
| 1 December 2025 | 13 hours 26 minutes | Carrier |
| 18 April 2026 | 10 hours 54 minutes | Carrier |
| 19 January 2026 | 8 hours 2 minutes | Carrier |
| 30 November 2025 | 7 hours 50 minutes | Extreme weather |
Delay causes
Why OO 3975 runs late
Carrier accounts for 77% of the 9,570 delay minutes carriers reported here, and the remaining four split what is left.
- 77%Carrier
- 19%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 19% 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 9,570 delay minutes reported on OO 3975.
Cancellations sit at 1.75% against a national 1.89%, which is ordinary. Diversions add another 0.35%.
Connections and routes
What a delay on this flight costs
11.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
Every one of the 286 flights under OO 3975 in the data flew ATW to MSP. 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. 286 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 3975
For a booking, read OO 3975 as 77.9% on time with 1.75% cancelled over 286 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATW to MSP, every carrier and departure
- MSP to ATW, the return direction
- 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
- How often a connection fails at the major US hubs
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.