Flight number record
OO 5723
SkyWest Airlines · South Bend to Chicago
- Route
- SBN → ORD
- Departs
- 06:05
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about 2.3 hours on average. That rests on 362 flights, with a median arrival 6 minutes early.
Key figures
On time
76.6%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
140 min
Across delayed arrivals only, not all flights
Cancelled
1.66%
National rate is 1.89%
1 hour+ late
9.9%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. Beyond the headline rate, 9.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 122 of 362 flights, with 05:45 (71 flights) and 06:00 (57 flights) next.
- Departs 06:05122 flights33.7%
- Departs 05:4571 flights19.6%
- Departs 06:0057 flights15.7%
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 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 13 points worse at 76.6%. 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 5723 next to SBN to ORD
Every carrier on SBN to ORD combined arrived on time 65.5% of the time across 2,790 flights, so OO 5723 is 11 points ahead of it. SkyWest flew 2,777 flights on the same city pair under all its flight numbers, including this one, and those ran 65.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5723thin sample | 362 | 76.6% | 140 min | 1.66% | B |
| All SkyWest Airlines on SBN–ORD | 2,777 | 65.7% | 100 min | 3.85% | C− |
| All carriers on SBN–ORD | 2,790 | 65.5% | 99 min | 3.87% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 93.3% on time and its weakest Oct–Dec 2025 at 71.1%, a swing of 22 points on roughly 72 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 flights93.3%
- Oct–Dec 202591 flights71.1%
- Jan–Mar 202688 flights74.4%
- Apr–Jun 202691 flights79.8%
- Jul–Sep 202662 flights75.0%
Scale runs 65% to 100%.
By weekday, OO 5723 did best on Thursday at 88.2% on time and worst on Sunday at 69.2%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5723 runs when it is late
OO 5723 often beats the schedule: 135 of 355 completed flights, 38%, arrived 15 minutes or more early. The 83 late arrivals split 23 under half an hour, 25 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early135 flights38.0%
- Within 15 min137 flights38.6%
- 15–29 min late23 flights6.5%
- 30–59 min late25 flights7.0%
- 1–2 hours late6 flights1.7%
- 2+ hours late29 flights8.2%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
9 of 59 late departures made up the time and arrived on time, 15% of them. In the other direction, 33 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 ORD.
The worst days
Worst days for OO 5723
The latest arrival of the period was on 18 May 2026, 10 hours 2 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across May, August, March, January and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 May 2026 | 10 hours 2 minutes | Carrier |
| 11 August 2026 | 9 hours 38 minutes | National Airspace System |
| 7 March 2026 | 9 hours 17 minutes | Carrier |
| 19 January 2026 | 9 hours 10 minutes | Extreme weather |
| 13 December 2025 | 8 hours 57 minutes | Late-arriving aircraft |
Delay causes
Why OO 5723 runs late
Carrier accounts for 63% of the 12,000 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 18%National Airspace System
- 10%Extreme weather
- 9%Late-arriving aircraft
The largest share of delay minutes, 63%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 7,342 of the 12,000 delay minutes reported here. The split is drawn from 11,577 delay minutes reported on OO 5723.
Cancellations sit at 1.66% against a national 1.89%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
9.9% 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.
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 76.6% on time with 1.66% cancelled over 362 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SBN to ORD, every carrier and departure
- ORD to SBN, the return direction
- SkyWest Airlines 5231 on the same route70.3%
- SkyWest Airlines 5675 on the same route51.2%
- SkyWest Airlines 4794 on the same route68.9%
- SkyWest Airlines 5489 on the same route61.2%
- Chicago O'Hare International (ORD) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
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 ; recomputed monthly. How this data is collected.