Flight number record
OO 4675
SkyWest Airlines · Colorado Springs to Denver
- Route
- COS → DEN
- Departs
- 11:31
- Flights
- 342
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4675, 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 4675 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 342 flights, with a median arrival 12 minutes early.
Set against the rest of the country, OO 4675's record is 6 points better than the US average of 77.3%. That gap is worth roughly 62 fewer late arrivals for every thousand flights.
Key figures
On time
83.5%
Arrivals under 15 minutes late, of 334 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
2.34%
National rate is 1.89%
1 hour+ late
6.0%
National rate is 8.3%
These figures cover 342 flights between September 2025 and August 2026. The median arrival is 12 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 4675 flies
OO 4675 flies COS to DEN without a single fixed slot. Its most common scheduled departure was 11:31, used on 81 of 342 flights, with 11:35 (60 flights) and 11:33 (56 flights) next.
- Departs 11:3181 flights23.7%
- Departs 11:3560 flights17.5%
- Departs 11:3356 flights16.4%
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 11:31 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4675 runs 5 points better at 83.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4675 next to COS to DEN
Every carrier on COS to DEN combined arrived on time 81.4% of the time across 4,989 flights, so OO 4675 is 2 points ahead of it. SkyWest flew 3,337 flights on the same city pair under all its flight numbers, including this one, and those ran 83.4% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4675thin sample | 342 | 83.5% | 62 min | 2.34% | B |
| All SkyWest Airlines on COS–DEN | 3,337 | 83.4% | 77 min | 1.53% | B |
| All carriers on COS–DEN | 4,989 | 81.4% | 72 min | 1.14% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4675 quarter by quarter
OO 4675 did not run the same all year. Its best quarter was Jul–Sep 2026 at 93.4% on time and its weakest Oct–Dec 2025 at 77.1%, a swing of 16 points on roughly 68 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 flights86.7%
- Oct–Dec 202591 flights77.1%
- Jan–Mar 202669 flights82.6%
- Apr–Jun 202691 flights82.4%
- Jul–Sep 202661 flights93.4%
Scale runs 70% to 100%.
By weekday, OO 4675 did best on Saturday at 95.7% on time and worst on Thursday at 74.5%. Each day rests on about 49 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4675 runs when it is late
OO 4675 often beats the schedule: 149 of 334 completed flights, 45%, arrived 15 minutes or more early. The 55 late arrivals split 20 under half an hour, 15 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early149 flights44.6%
- Within 15 min130 flights38.9%
- 15–29 min late20 flights6.0%
- 30–59 min late15 flights4.5%
- 1–2 hours late13 flights3.9%
- 2+ hours late7 flights2.1%
Scale runs 0% to 100%.
Share of 334 completed flights by arrival against schedule.
17 of 59 late departures made up the time and arrived on time, 29% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for OO 4675
The latest arrival of the period was on 30 March 2026, 5 hours 33 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 March 2026 | 5 hours 33 minutes | Carrier |
| 10 May 2026 | 3 hours 39 minutes | Carrier |
| 6 March 2026 | 3 hours 24 minutes | Late-arriving aircraft |
| 7 December 2025 | 2 hours 45 minutes | Carrier |
| 19 December 2025 | 2 hours 22 minutes | National Airspace System |
Delay causes
Why OO 4675 runs late
Carrier accounts for 53% of the 3,389 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 29%Late-arriving aircraft
- 15%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,802 of the 3,389 delay minutes reported here. The split is drawn from 3,389 delay minutes reported on OO 4675.
Cancellations sit at 2.34% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.0% 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 same number turns up on three other city pairs in the data, including SFO to MTJ (6), SFO to SEA (1) and IAH to SAT (1), but none flew often enough under OO 4675 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to COS to DEN only.
One caution: this is a thin sample. 342 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 4675
For a booking, read OO 4675 as 83.5% on time with 2.34% cancelled over 342 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- COS to DEN, every carrier and departure
- DEN to COS, the return direction
- SkyWest Airlines 5634 on the same route85.0%
- SkyWest Airlines 4696 on the same route89.7%
- SkyWest Airlines 5291 on the same route90.6%
- SkyWest Airlines 4719 on the same route67.7%
- 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.