Flight number record

OO 4794

SkyWest Airlines · South Bend to Chicago

Route: SBN → ORD
Departs: 09:10
Flights: 329
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4794, 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 4794 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 329 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so OO 4794 runs 7 points behind the country as a whole. Across a thousand flights that is about 67 extra late arrivals.

On time

70.9%

Arrivals under 15 minutes late, of 320 completed flights

Avg delay

86 min

Across delayed arrivals only, not all flights

Cancelled

2.43%

National rate is 1.81%

1 hour+ late

10.9%

National rate is 8.1%

These figures cover 329 flights between July 2025 and June 2026. Beyond the headline rate, 10.9% 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 4794 flies

OO 4794 flies SBN to ORD without a single fixed slot. Its most common scheduled departure was 09:10, used on 103 of 329 flights, with 09:20 (70 flights) and 09:11 (57 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:10103 flights31.3%
Departs 09:2070 flights21.3%
Departs 09:1157 flights17.3%

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 09:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4794 runs 13 points worse at 70.9%. 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 4794 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 4794 is 6 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 8 points.

OO 4794 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4794thin sample	329	70.9%	86 min	2.43%	C
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 4794 quarter by quarter

OO 4794 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.8% on time and its weakest Jan–Mar 2026 at 60.7%, a swing of 18 points on roughly 82 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 flights76.1%
Oct–Dec 202591 flights71.3%
Jan–Mar 202690 flights60.7%
Apr–Jun 202656 flights78.8%

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

By weekday, OO 4794 did best on Sunday at 78.3% on time and worst on Tuesday at 65.2%. Each day rests on about 47 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4794 runs late

One category carries most of the weight here. Carrier accounts for 49% of the 7,993 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
49%
Late-arriving aircraft
24%
National Airspace System
20%
Extreme weather
7%

The largest share of delay minutes, 49%, 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 3,897 of the 7,993 delay minutes reported here. The split is drawn from 7,993 delay minutes reported on OO 4794.

Cancellations sit at 2.43% against a national 1.81%, which is ordinary. Diversions add another 0.30%.

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. 10.9% 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 ORD to GSP (24) and ORD to COU (11), but none flew often enough under OO 4794 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SBN to ORD only.

One caution: this is a thin sample. 329 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 4794

For a booking, read OO 4794 as 70.9% on time with 2.43% cancelled over 329 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