Flight number record

OO 5723

SkyWest Airlines · South Bend to Chicago

Route: SBN → ORD
Departs: 06:05
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5723, 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 5723 lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about 2.5 hours on average. That is a workable record, not a spotless one. That rests on 362 flights, with a median arrival 7 minutes early.

On time

77.0%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

152 min

Across delayed arrivals only, not all flights

Cancelled

1.66%

National rate is 1.81%

1 hour+ late

10.1%

National rate is 8.1%

These figures cover 362 flights between July 2025 and June 2026. Beyond the headline rate, 10.1% 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 5723 flies

OO 5723 flies SBN to ORD without a single fixed slot. Its most common scheduled departure was 06:05, used on 171 of 362 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:05171 flights47.2%

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 06:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5723 runs 12 points worse at 77.0%. 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 5723 next to SBN to ORD

Every carrier on SBN to ORD combined arrived on time 65.0% of the time across 2,705 flights, so OO 5723 is 12 points ahead of it. SkyWest flew 2,692 flights on the same city pair under all its flight numbers, including this one, and those ran 65.1% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 2 points.

OO 5723 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5723thin sample	362	77.0%	152 min	1.66%	B
All SkyWest Airlines on SBN–ORD	2,692	65.1%	95 min	3.79%	C−
All carriers on SBN–ORD	2,705	65.0%	95 min	3.81%	C−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5723 quarter by quarter

OO 5723 did not run the same all year. Its best quarter was Jul–Sep 2025 at 82.4% on time and its weakest Oct–Dec 2025 at 71.1%, a swing of 11 points on roughly 91 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 flights82.4%
Oct–Dec 202591 flights71.1%
Jan–Mar 202688 flights74.4%
Apr–Jun 202691 flights79.8%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5723 did best on Wednesday at 90.0% on time and worst on Monday at 63.5%. Each day rests on about 52 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5723 runs late

One category carries most of the weight here. Carrier accounts for 67% 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
67%
National Airspace System
13%
Late-arriving aircraft
11%
Extreme weather
9%

The largest share of delay minutes, 67%, 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 8,364 of the 12,000 delay minutes reported here. The split is drawn from 12,448 delay minutes reported on OO 5723.

Cancellations sit at 1.66% 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. 10.1% 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 362 flights under OO 5723 in the data flew SBN to ORD. 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. 362 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 5723

For a booking, read OO 5723 as 77.0% on time with 1.66% cancelled over 362 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