Flight number record

OO 3961

SkyWest Airlines · Fort Wayne to Detroit

Route: FWA → DTW
Departs: 08:12
Flights: 279
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3961, 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 3961 lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 279 flights, with a median arrival 5 minutes early.

On time

79.6%

Arrivals under 15 minutes late, of 275 completed flights

Avg delay

95 min

Across delayed arrivals only, not all flights

Cancelled

1.43%

National rate is 1.89%

1 hour+ late

9.8%

National rate is 8.3%

These figures cover 279 flights between September 2025 and August 2026. Beyond the headline rate, 9.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When OO 3961 flies

OO 3961 flies FWA to DTW without a single fixed slot. Its most common scheduled departure was 08:12, used on 74 of 279 flights, with 08:10 (65 flights) and 08:25 (64 flights) next.

Departs 08:1274 flights26.5%
Departs 08:1065 flights23.3%
Departs 08:2564 flights22.9%

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 08:12 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 3961 runs 4 points worse at 79.6%. 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 3961 next to FWA to DTW

Every carrier on FWA to DTW combined arrived on time 78.9% of the time across 649 flights, so OO 3961 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, close to this flight's figure.

OO 3961 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3961thin sample	279	79.6%	95 min	1.43%	B
All SkyWest Airlines on FWA–DTW	649	78.9%	108 min	0.62%	B+
All carriers on FWA–DTW	649	78.9%	108 min	0.62%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 3961 quarter by quarter

OO 3961 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 67.8%, a swing of 29 points on roughly 70 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 flights96.7%
Oct–Dec 202592 flights78.0%
Jan–Mar 202690 flights67.8%
Apr–Jun 202667 flights89.6%

Scale runs 60% to 100%.

By weekday, OO 3961 did best on Tuesday at 85.0% on time and worst on Sunday at 68.4%. Each day rests on about 40 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 3961 runs when it is late

The 56 late arrivals split 15 under half an hour, 14 between 30 and 60 minutes, and 27 an hour or more.

15+ min early55 flights20.0%
Within 15 min164 flights59.6%
15–29 min late15 flights5.5%
30–59 min late14 flights5.1%
1–2 hours late10 flights3.6%
2+ hours late17 flights6.2%

Scale runs 0% to 100%.

Share of 275 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 42 departures that left 15 minutes late or more, only 1 made it up before arrival. In the other direction, 15 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 DTW.

The worst days

Worst days for OO 3961

The latest arrival of the period was on 17 March 2026, 7 hours 10 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.

The latest arrivals of OO 3961 in the period
Date	Arrived late by	Largest filed cause
17 March 2026	7 hours 10 minutes	Carrier
1 March 2026	6 hours 52 minutes	Carrier
10 January 2026	5 hours 16 minutes	Extreme weather
5 December 2025	4 hours	Carrier
18 March 2026	3 hours 52 minutes	Carrier

Delay causes

Why OO 3961 runs late

Carrier accounts for 71% of the 5,340 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
71%
Extreme weather
13%
National Airspace System
13%
Security
3%

Extreme weather accounts for 13% 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 2.2 times the usual weather exposure. The split is drawn from 5,340 delay minutes reported on OO 3961.

Cancellations sit at 1.43% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

9.8% 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.

The same number turns up on two other city pairs in the data, including DTW to PVD (82) and PVD to DTW (82), but none flew often enough under OO 3961 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to FWA to DTW only.

One caution: this is a thin sample. 279 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 3961

For a booking, read OO 3961 as 79.6% on time with 1.43% cancelled over 279 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures