Flight number record

OO 3961

SkyWest Airlines · Fort Wayne to Detroit

Route: FWA → DTW
Departs: 08:15
Flights: 341
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 341 flights, with a median arrival 5 minutes early.

On time

80.7%

Arrivals under 15 minutes late, of 337 completed flights

Avg delay

101 min

Across delayed arrivals only, not all flights

Cancelled

1.17%

National rate is 1.81%

1 hour+ late

9.2%

National rate is 8.1%

These figures cover 341 flights between July 2025 and June 2026. Beyond the headline rate, 9.2% 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 3961 flies

OO 3961 flies FWA to DTW without a single fixed slot. Its most common scheduled departure was 08:15, used on 87 of 341 flights, with 08:25 (85 flights) and 08:12 (74 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:1587 flights25.5%
Departs 08:2585 flights24.9%
Departs 08:1274 flights21.7%

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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 3961 runs 3 points worse at 80.7%. 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 3961 next to FWA to DTW

Every carrier on FWA to DTW combined arrived on time 79.9% of the time across 702 flights, so OO 3961 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 2 points.

OO 3961 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3961thin sample	341	80.7%	101 min	1.17%	B
All SkyWest Airlines on FWA–DTW	702	79.9%	110 min	0.57%	B+
All carriers on FWA–DTW	702	79.9%	110 min	0.57%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3961 quarter by quarter

OO 3961 did not run the same all year. Its best quarter was Apr–Jun 2026 at 89.6% on time and its weakest Jan–Mar 2026 at 67.8%, a swing of 22 points on roughly 85 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 202592 flights89.1%
Oct–Dec 202592 flights78.0%
Jan–Mar 202690 flights67.8%
Apr–Jun 202667 flights89.6%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3961 did best on Tuesday at 87.8% on time and worst on Sunday at 70.2%. Each day rests on about 49 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3961 runs late

One category carries most of the weight here. Carrier accounts for 76% of the 6,569 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
11%
National Airspace System
11%
Security
3%

The largest share of delay minutes, 76%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 4,982 of the 6,569 delay minutes reported here. The split is drawn from 6,569 delay minutes reported on OO 3961.

Cancellations sit at 1.17% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 (24) and PVD to DTW (24), 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. 341 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 80.7% on time with 1.17% cancelled over 341 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures