Flight number record
OO 5576
SkyWest Airlines · Rapid City to Denver
- Route
- RAP → DEN
- Departs
- 05:00
- Flights
- 324
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5576, 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 5576 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 3.2 hours. That rests on 324 flights, with a median arrival 21 minutes early.
Set against the rest of the country, OO 5576's record is 11 points better than the US average of 77.3%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.
Key figures
On time
88.5%
Arrivals under 15 minutes late, of 322 completed flights
Avg delay
192 min
Across delayed arrivals only, not all flights
Cancelled
0.62%
National rate is 1.89%
1 hour+ late
8.4%
National rate is 8.3%
These figures cover 324 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5576 flies
OO 5576 flies RAP to DEN without a single fixed slot. Its most common scheduled departure was 05:00, used on 93 of 324 flights, with 05:15 (69 flights) and 05:30 (55 flights) next.
- Departs 05:0093 flights28.7%
- Departs 05:1569 flights21.3%
- Departs 05:3055 flights17.0%
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 05:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5576 runs level with that at 88.5%. 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 5576 next to RAP to DEN
Every carrier on RAP to DEN combined arrived on time 80.5% of the time across 2,844 flights, so OO 5576 is 8 points ahead of it. SkyWest flew 2,082 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5576thin sample | 324 | 88.5% | 192 min | 0.62% | A+ |
| All SkyWest Airlines on RAP–DEN | 2,082 | 79.3% | 94 min | 1.34% | B |
| All carriers on RAP–DEN | 2,844 | 80.5% | 90 min | 1.16% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5576 quarter by quarter
OO 5576 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 85.0%, a swing of 12 points on roughly 65 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 flights96.7%
- Oct–Dec 202589 flights85.4%
- Jan–Mar 202689 flights89.9%
- Apr–Jun 202655 flights90.7%
- Jul–Sep 202661 flights85.0%
Scale runs 75% to 100%.
By weekday, OO 5576 did best on Wednesday at 95.7% on time and worst on Monday at 83.3%. Each day rests on about 46 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5576 runs when it is late
OO 5576 often beats the schedule: 204 of 322 completed flights, 63%, arrived 15 minutes or more early. When OO 5576 is late it tends to be very late: 27 of its 37 late arrivals were an hour or more behind, and 25 were two hours or more.
- 15+ min early204 flights63.4%
- Within 15 min81 flights25.2%
- 15–29 min late6 flights1.9%
- 30–59 min late4 flights1.2%
- 1–2 hours late2 flights0.6%
- 2+ hours late25 flights7.8%
Scale runs 0% to 100%.
Share of 322 completed flights by arrival against schedule.
4 of 33 late departures made up the time and arrived on time, 12% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for OO 5576
The latest arrival of the period was on 18 December 2025, 10 hours 21 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 December 2025 | 10 hours 21 minutes | Extreme weather |
| 6 August 2026 | 9 hours 3 minutes | Late-arriving aircraft |
| 1 January 2026 | 8 hours 59 minutes | Extreme weather |
| 15 March 2026 | 7 hours 23 minutes | Carrier |
| 4 August 2026 | 6 hours 31 minutes | Extreme weather |
Delay causes
Why OO 5576 runs late
Carrier accounts for 47% of the 7,092 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 25%Late-arriving aircraft
- 24%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 24% 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 3.9 times the usual weather exposure. The split is drawn from 7,092 delay minutes reported on OO 5576.
Cancellations are rare at 0.62%, 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
8.4% 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 3.2 hours, which a normal layover absorbs.
The same number turns up on four other city pairs in the data, including FAR to ORD (23), ORD to FSD (10) and SUN to DEN (1), but none flew often enough under OO 5576 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to RAP to DEN only.
One caution: this is a thin sample. 324 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 5576
For a booking, OO 5576 has one of the better records a US domestic flight can show: 88.5% on time and 0.62% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- RAP to DEN, every carrier and departure
- DEN to RAP, the return direction
- United Airlines 1767 on the same route85.0%
- SkyWest Airlines 5884 on the same route76.8%
- SkyWest Airlines 5708 on the same route81.3%
- SkyWest Airlines 5742 on the same route89.8%
- 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
- Connecting flights: how much buffer the data says you need
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.