Flight number record

OO 4758

SkyWest Airlines · Billings to Denver

Route: BIL → DEN
Departs: 17:57
Flights: 296
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4758, 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 4758 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 about an hour behind schedule. That rests on 296 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so OO 4758 runs 7 points behind the country as a whole. Across a thousand flights that is about 69 extra late arrivals.

On time

70.7%

Arrivals under 15 minutes late, of 287 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

2.70%

National rate is 1.81%

1 hour+ late

10.1%

National rate is 8.1%

These figures cover 296 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 4758 flies

OO 4758 flies BIL to DEN without a single fixed slot. Its most common scheduled departure was 17:57, used on 60 of 296 flights, with 17:51 (54 flights) and 17:54 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:5760 flights20.3%
Departs 17:5154 flights18.2%
Departs 17:5445 flights15.2%

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 17:57 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 4758 runs 3 points better at 70.7%. 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 4758 next to BIL to DEN

Every carrier on BIL to DEN combined arrived on time 82.3% of the time across 1,782 flights, so OO 4758 is 12 points behind it. SkyWest flew 1,052 flights on the same city pair under all its flight numbers, including this one, and those ran 81.9% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 8 points.

OO 4758 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4758thin sample	296	70.7%	66 min	2.70%	C
All SkyWest Airlines on BIL–DEN	1,052	81.9%	82 min	1.43%	B
All carriers on BIL–DEN	1,782	82.3%	76 min	0.84%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4758 quarter by quarter

OO 4758 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.9% on time and its weakest Jul–Sep 2025 at 49.2%, a swing of 30 points on roughly 74 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 202561 flights49.2%
Oct–Dec 202591 flights74.7%
Jan–Mar 202653 flights74.5%
Apr–Jun 202691 flights78.9%

Scale runs 40% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4758 did best on Wednesday at 82.1% on time and worst on Thursday at 64.1%. Each day rests on about 42 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4758 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,541 reported delay minutes.

Late-arriving aircraft
38%
Carrier
29%
National Airspace System
24%
Extreme weather
10%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,541 reported delay minutes here, that single category outweighs weather by 4 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,541 delay minutes reported on OO 4758.

Cancellations run at 2.70%, against 1.81% nationally. That is about one flight in 40 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. 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.

The same number turns up on four other city pairs in the data, including TUS to DEN (35), DEN to BIL (31) and COS to IAH (1), but none flew often enough under OO 4758 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BIL to DEN only.

One caution: this is a thin sample. 296 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 4758

For a booking, the cancellation rate is the figure to plan around on OO 4758: 2.70% of its 296 scheduled flights did not operate. A late arrival costs about an hour, 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