Flight number record

OO 3917

SkyWest Airlines · Detroit to Fort Wayne

Route: DTW → FWA
Departs: 20:00
Flights: 341
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3917, 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 3917 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 341 flights, with a median arrival right on schedule.

The national on-time rate over the same period is 77.6%, so OO 3917 runs 12 points behind the country as a whole. Across a thousand flights that is about 117 extra late arrivals.

On time

65.9%

Arrivals under 15 minutes late, of 337 completed flights

Avg delay

105 min

Across delayed arrivals only, not all flights

Cancelled

1.17%

National rate is 1.81%

1 hour+ late

18.4%

National rate is 8.1%

These figures cover 341 flights between July 2025 and June 2026. Beyond the headline rate, 18.4% 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 3917 flies

OO 3917 flies DTW to FWA without a single fixed slot. Its most common scheduled departure was 20:00, used on 75 of 341 flights, with 19:59 (62 flights) and 19:48 (57 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:0075 flights22.0%
Departs 19:5962 flights18.2%
Departs 19:4857 flights16.7%

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 20:00 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 3917 runs 5 points worse at 65.9%. 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 3917 next to DTW to FWA

Every carrier on DTW to FWA combined arrived on time 71.4% of the time across 702 flights, so OO 3917 is 6 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 13 points.

OO 3917 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3917thin sample	341	65.9%	105 min	1.17%	C
All SkyWest Airlines on DTW–FWA	702	71.4%	95 min	0.57%	C+
All carriers on DTW–FWA	702	71.4%	95 min	0.57%	C+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3917 quarter by quarter

OO 3917 did not run the same all year. Its best quarter was Apr–Jun 2026 at 80.6% on time and its weakest Jul–Sep 2025 at 59.8%, a swing of 21 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 flights59.8%
Oct–Dec 202592 flights65.9%
Jan–Mar 202690 flights60.9%
Apr–Jun 202667 flights80.6%

Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3917 did best on Thursday at 73.5% on time and worst on Sunday at 46.8%. Each day rests on about 49 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3917 runs late

One category carries most of the weight here. Carrier accounts for 72% of the 12,000 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
72%
Extreme weather
18%
National Airspace System
10%

Extreme weather accounts for 18% 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 2.9 times the usual weather exposure. The split is drawn from 12,078 delay minutes reported on OO 3917.

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. 18.4% 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.

Every one of the 341 flights under OO 3917 in the data flew DTW to FWA. 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. 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 3917

For a booking, OO 3917 is a flight to put a long connection behind. 18.4% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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