Flight number record
OO 5546
SkyWest Airlines · Denver to Colorado Springs
- Route
- DEN → COS
- Departs
- 15:35
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5546, 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 5546 lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 363 flights, with a median arrival 7 minutes early.
Key figures
On time
80.6%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
2.20%
National rate is 1.89%
1 hour+ late
7.0%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 7 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 5546 flies
OO 5546 flies DEN to COS without a single fixed slot. Its most common scheduled departure was 15:35, used on 269 of 363 flights, with 15:40 (78 flights) next.
- Departs 15:35269 flights74.1%
- Departs 15:4078 flights21.5%
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 15:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 5546 runs 9 points better at 80.6%. 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 5546 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 5546 is 4 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 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5546thin sample | 363 | 80.6% | 67 min | 2.20% | 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 5546 quarter by quarter
Quarter by quarter OO 5546 held fairly steady: 83.3% in Jul–Sep 2025, 85.7% in Oct–Dec 2025, 80.7% in Jan–Mar 2026, 78.0% in Apr–Jun 2026 and 75.8% in Jul–Sep 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 202530 flights83.3%
- Oct–Dec 202591 flights85.7%
- Jan–Mar 202689 flights80.7%
- Apr–Jun 202691 flights78.0%
- Jul–Sep 202662 flights75.8%
Scale runs 65% to 90%.
By weekday, OO 5546 did best on Saturday at 86.3% on time and worst on Friday at 70.0%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5546 runs when it is late
The 69 late arrivals split 23 under half an hour, 21 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early81 flights22.8%
- Within 15 min205 flights57.7%
- 15–29 min late23 flights6.5%
- 30–59 min late21 flights5.9%
- 1–2 hours late14 flights3.9%
- 2+ hours late11 flights3.1%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
14 of 63 late departures made up the time and arrived on time, 22% of them. In the other direction, 20 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at COS.
The worst days
Worst days for OO 5546
The latest arrival of the period was on 3 August 2026, 5 hours 36 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 |
|---|---|---|
| 3 August 2026 | 5 hours 36 minutes | Carrier |
| 15 August 2026 | 4 hours 23 minutes | Late-arriving aircraft |
| 29 May 2026 | 4 hours 19 minutes | Carrier |
| 12 October 2025 | 4 hours 14 minutes | Carrier |
| 26 July 2026 | 2 hours 55 minutes | Extreme weather |
Delay causes
Why OO 5546 runs late
Carrier accounts for 55% of the 4,653 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Carrier
- 23%Late-arriving aircraft
- 12%National Airspace System
- 11%Extreme weather
The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,554 of the 4,653 delay minutes reported here. The split is drawn from 4,653 delay minutes reported on OO 5546.
Cancellations sit at 2.20% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.0% 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.
Every one of the 363 flights under OO 5546 in the data flew DEN to COS. The number was not reused on any other city pair, which makes this a clean record of one route.
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 5546
For a booking, read OO 5546 as 80.6% on time with 2.20% 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 COS, every carrier and departure
- COS to DEN, the return direction
- SkyWest Airlines 5246 on the same route84.3%
- SkyWest Airlines 5861 on the same route66.5%
- SkyWest Airlines 4650 on the same route76.3%
- SkyWest Airlines 5306 on the same route83.6%
- 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.