Flight number record
OO 5306
SkyWest Airlines · Denver to Colorado Springs
- Route
- DEN → COS
- Departs
- 09:45
- Flights
- 319
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5306, 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 5306 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 a little over an hour on average. That rests on 319 flights, with a median arrival 8 minutes early.
Set against the rest of the country, OO 5306's record is 6 points better than the US average of 77.3%. That gap is worth roughly 63 fewer late arrivals for every thousand flights.
Key figures
On time
83.6%
Arrivals under 15 minutes late, of 311 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
2.51%
National rate is 1.89%
1 hour+ late
5.5%
National rate is 8.3%
These figures cover 319 flights between September 2025 and August 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.
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Schedule
When OO 5306 flies
OO 5306 flies DEN to COS without a single fixed slot. Its most common scheduled departure was 09:45, used on 76 of 319 flights, with 09:55 (61 flights) and 10:05 (53 flights) next.
- Departs 09:4576 flights23.8%
- Departs 09:5561 flights19.1%
- Departs 10:0553 flights16.6%
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 09:45 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5306 runs level with that at 83.6%. 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 5306 next to DEN to COS
Every carrier on DEN to COS combined arrived on time 76.5% of the time across 4,989 flights, so OO 5306 is 7 points ahead of it. SkyWest flew 3,338 flights on the same city pair under all its flight numbers, including this one, and those ran 76.6% 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 5306thin sample | 319 | 83.6% | 70 min | 2.51% | B |
| All SkyWest Airlines on DEN–COS | 3,338 | 76.6% | 73 min | 1.65% | B |
| All carriers on DEN–COS | 4,989 | 76.5% | 68 min | 1.26% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5306 quarter by quarter
OO 5306 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 79.2%, a swing of 14 points on roughly 64 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 flights93.3%
- Oct–Dec 202592 flights83.3%
- Jan–Mar 202653 flights79.2%
- Apr–Jun 202690 flights80.0%
- Jul–Sep 202654 flights88.9%
Scale runs 70% to 100%.
By weekday, OO 5306 did best on Saturday at 91.9% on time and worst on Friday at 75.6%. Each day rests on about 46 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5306 runs when it is late
OO 5306 often beats the schedule: 89 of 311 completed flights, 29%, arrived 15 minutes or more early. The 51 late arrivals split 19 under half an hour, 15 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early89 flights28.6%
- Within 15 min171 flights55.0%
- 15–29 min late19 flights6.1%
- 30–59 min late15 flights4.8%
- 1–2 hours late7 flights2.3%
- 2+ hours late10 flights3.2%
Scale runs 0% to 100%.
Share of 311 completed flights by arrival against schedule.
10 of 49 late departures made up the time and arrived on time, 20% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for OO 5306
The latest arrival of the period was on 23 March 2026, 5 hours 54 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 March 2026 | 5 hours 54 minutes | Late-arriving aircraft |
| 6 March 2026 | 5 hours 31 minutes | Extreme weather |
| 4 July 2026 | 4 hours 54 minutes | Late-arriving aircraft |
| 3 December 2025 | 3 hours 25 minutes | Extreme weather |
| 13 February 2026 | 3 hours 16 minutes | Late-arriving aircraft |
Delay causes
Why OO 5306 runs late
Late-arriving aircraft accounts for 53% of the 3,582 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 23%Carrier
- 14%Extreme weather
- 10%National Airspace System
Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.3 times the usual weather exposure. The split is drawn from 3,582 delay minutes reported on OO 5306.
Cancellations run at 2.51%, against 1.89% 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
5.5% 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 a little over an hour, which a normal layover absorbs.
The same number turns up on three other city pairs in the data, including CMH to IAH (5), SFO to ABQ (3) and PNS to IAH (1), but none flew often enough under OO 5306 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to COS only.
One caution: this is a thin sample. 319 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 5306
For a booking, the cancellation rate is the figure to plan around on OO 5306: 2.51% of its 319 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- DEN to COS, every carrier and departure
- COS to DEN, the return direction
- SkyWest Airlines 5546 on the same route80.6%
- SkyWest Airlines 5246 on the same route84.3%
- SkyWest Airlines 5861 on the same route66.5%
- SkyWest Airlines 4650 on the same route76.3%
- 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
- Why the first flight of the morning is statistically safest
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.