Flight number record

OO 5274

SkyWest Airlines · Chicago to South Bend

Route: ORD → SBN
Departs: 21:30
Flights: 332
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5274, 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 5274 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land close to two hours behind schedule. That rests on 332 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so OO 5274 runs 8 points behind the country as a whole. Across a thousand flights that is about 83 extra late arrivals.

On time

69.3%

Arrivals under 15 minutes late, of 316 completed flights

Avg delay

103 min

Across delayed arrivals only, not all flights

Cancelled

4.82%

National rate is 1.81%

1 hour+ late

13.0%

National rate is 8.1%

These figures cover 332 flights between July 2025 and June 2026. Beyond the headline rate, 13.0% 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 5274 flies

OO 5274 flies ORD to SBN without a single fixed slot. Its most common scheduled departure was 21:30, used on 100 of 332 flights, with 21:20 (96 flights) and 21:25 (85 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:30100 flights30.1%
Departs 21:2096 flights28.9%
Departs 21:2585 flights25.6%

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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 5274 runs level with that at 69.3%. 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 5274 next to ORD to SBN

Every carrier on ORD to SBN combined arrived on time 62.7% of the time across 2,704 flights, so OO 5274 is 7 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 62.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 10 points.

OO 5274 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5274thin sample	332	69.3%	103 min	4.82%	C−
All SkyWest Airlines on ORD–SBN	2,692	62.5%	87 min	4.27%	D−
All carriers on ORD–SBN	2,704	62.7%	87 min	4.25%	D−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5274 quarter by quarter

Quarter by quarter OO 5274 held fairly steady: 69.7% in Jul–Sep 2025, 69.9% in Oct–Dec 2025, 70.6% in Jan–Mar 2026 and 66.1% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights69.7%
Oct–Dec 202589 flights69.9%
Jan–Mar 202690 flights70.6%
Apr–Jun 202662 flights66.1%

Scale runs 60% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5274 did best on Tuesday at 77.1% on time and worst on Sunday at 52.3%. Each day rests on about 47 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5274 runs late

One category carries most of the weight here. Carrier accounts for 49% of the 9,953 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
31%
National Airspace System
13%
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 4,840 of the 9,953 delay minutes reported here. The split is drawn from 9,953 delay minutes reported on OO 5274.

Cancellations run at 4.82%, against 1.81% nationally. That is about one flight in twenty cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

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. 13.0% 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 one other city pair in the data, including CRW to ORD (29), but none flew often enough under OO 5274 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to SBN only.

One caution: this is a thin sample. 332 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 5274

For a booking, the cancellation rate is the figure to plan around on OO 5274: 4.82% of its 332 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.

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