Flight number record
OO 4663
SkyWest Airlines · Denver to Bismarck
- Route
- DEN → BIS
- Departs
- 10:05
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 363 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 4663's record is 7 points better than the US average of 77.3%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.
Key figures
On time
84.7%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
6.1%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 10 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.
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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 177 of 363 flights, with 10:10 (68 flights) and 10:20 (37 flights) next.
- Departs 10:05177 flights48.8%
- Departs 10:1068 flights18.7%
- Departs 10:2037 flights10.2%
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 10:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4663 runs level with that at 84.7%. 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 4663 next to DEN to BIS
Every carrier on DEN to BIS combined arrived on time 76.9% of the time across 1,433 flights, so OO 4663 is 8 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4663thin sample | 363 | 84.7% | 61 min | 0.55% | B+ |
| All SkyWest Airlines on DEN–BIS | 1,433 | 76.9% | 86 min | 0.70% | B+ |
| All carriers on DEN–BIS | 1,433 | 76.9% | 86 min | 0.70% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4663 quarter by quarter
Quarter by quarter OO 4663 held fairly steady: 86.7% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 81.8% in Jan–Mar 2026, 90.0% in Apr–Jun 2026 and 85.5% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights86.7%
- Oct–Dec 202592 flights81.1%
- Jan–Mar 202689 flights81.8%
- Apr–Jun 202690 flights90.0%
- Jul–Sep 202662 flights85.5%
Scale runs 75% to 95%.
By weekday, OO 4663 did best on Tuesday at 92.2% on time and worst on Monday at 77.4%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4663 runs when it is late
OO 4663 often beats the schedule: 114 of 360 completed flights, 32%, arrived 15 minutes or more early. The 55 late arrivals split 19 under half an hour, 14 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early114 flights31.7%
- Within 15 min191 flights53.1%
- 15–29 min late19 flights5.3%
- 30–59 min late14 flights3.9%
- 1–2 hours late16 flights4.4%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
13 of 53 late departures made up the time and arrived on time, 25% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for OO 4663
The latest arrival of the period was on 17 January 2026, 5 hours 33 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 January 2026 | 5 hours 33 minutes | Late-arriving aircraft |
| 23 March 2026 | 3 hours 23 minutes | Carrier |
| 6 April 2026 | 2 hours 32 minutes | Carrier |
| 17 February 2026 | 2 hours 17 minutes | Carrier |
| 10 August 2026 | 2 hours 12 minutes | Carrier |
Delay causes
Why OO 4663 runs late
Carrier accounts for 66% of the 3,344 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Carrier
- 28%Late-arriving aircraft
- 6%National Airspace System
- 0%Extreme weather
The largest share of delay minutes, 66%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,202 of the 3,344 delay minutes reported here. The split is drawn from 3,344 delay minutes reported on OO 4663.
Cancellations are rare at 0.55%, below the national 1.89% 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
6.1% of arrivals land an hour or more late, close to the national 8.3%, so 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.
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 84.7% on time with 0.55% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to BIS, every carrier and departure
- BIS to DEN, the return direction
- SkyWest Airlines 4665 on the same route69.6%
- SkyWest Airlines 4799 on the same route75.5%
- Denver International (DEN) 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
- Worst months to fly in the US, ranked by the data
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.