Flight number record

OO 4663

SkyWest Airlines · Denver to Bismarck

Route: DEN → BIS
Departs: 10:05
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4663, 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 4663 lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 363 flights, with a median arrival 8 minutes early.

Set against the rest of the country, OO 4663's record is 6 points better than the US average of 77.6%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.

On time

83.3%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

5.6%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When OO 4663 flies

OO 4663 flies DEN to BIS without a single fixed slot. Its most common scheduled departure was 10:05, used on 115 of 363 flights, with 10:10 (81 flights) and 10:09 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:05115 flights31.7%
Departs 10:1081 flights22.3%
Departs 10:0949 flights13.5%

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 10:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4663 runs level with that at 83.3%. 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 4663 next to DEN to BIS

Every carrier on DEN to BIS combined arrived on time 76.2% of the time across 1,502 flights, so OO 4663 is 7 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 4 points.

OO 4663 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4663thin sample	363	83.3%	57 min	0.55%	B+
All SkyWest Airlines on DEN–BIS	1,502	76.2%	88 min	0.73%	B+
All carriers on DEN–BIS	1,502	76.2%	88 min	0.73%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4663 quarter by quarter

Quarter by quarter OO 4663 held fairly steady: 80.4% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 81.8% in Jan–Mar 2026 and 90.0% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights80.4%
Oct–Dec 202592 flights81.1%
Jan–Mar 202689 flights81.8%
Apr–Jun 202690 flights90.0%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4663 did best on Tuesday at 92.3% on time and worst on Monday at 69.2%. Each day rests on about 52 flights, so a gap of 23 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4663 runs late

One category carries most of the weight here. Carrier accounts for 56% of the 3,436 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
56%
Late-arriving aircraft
32%
National Airspace System
11%
Extreme weather
0%

The largest share of delay minutes, 56%, 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 1,923 of the 3,436 delay minutes reported here. The split is drawn from 3,436 delay minutes reported on OO 4663.

Cancellations are rare at 0.55%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

5.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The 516 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on two other city pairs in the data, including CID to DEN (1) and MLI to ORD (1), but none flew often enough under OO 4663 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to BIS only.

One caution: this is a thin sample. 363 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 4663

For a booking, read OO 4663 as 83.3% on time with 0.55% cancelled over 363 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