Flight number record
OO 4797
SkyWest Airlines · Denver to Casper
- Route
- DEN → CPR
- Departs
- 13:25
- Flights
- 344
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4797, 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 4797 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 344 flights, with a median arrival 9 minutes early.
Set against the rest of the country, OO 4797's record is 8 points better than the US average of 77.3%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.
Key figures
On time
85.2%
Arrivals under 15 minutes late, of 338 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
1.16%
National rate is 1.89%
1 hour+ late
5.6%
National rate is 8.3%
These figures cover 344 flights between September 2025 and August 2026. The median arrival is 9 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 4797 flies
OO 4797 is scheduled to leave Denver (DEN) at 13:25 local time and reach Casper (CPR) at 14:40. That slot held for 281 of the 344 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 13:25281 flights81.7%
- Departs 13:3036 flights10.5%
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 13:25 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4797 runs 7 points better at 85.2%. 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 4797 next to DEN to CPR
Every carrier on DEN to CPR combined arrived on time 77.7% of the time across 2,629 flights, so OO 4797 is 8 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4797thin sample | 344 | 85.2% | 71 min | 1.16% | A |
| All SkyWest Airlines on DEN–CPR | 2,629 | 77.7% | 82 min | 0.95% | B+ |
| All carriers on DEN–CPR | 2,629 | 77.7% | 82 min | 0.95% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4797 quarter by quarter
OO 4797 did not run the same all year. Its best quarter was Jul–Sep 2026 at 90.2% on time and its weakest Apr–Jun 2026 at 79.8%, a swing of 10 points on roughly 86 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 flights—
- Oct–Dec 202592 flights89.1%
- Jan–Mar 202690 flights80.5%
- Apr–Jun 202691 flights79.8%
- Jul–Sep 202641 flights90.2%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4797 did best on Wednesday at 91.8% on time and worst on Friday at 73.9%. Each day rests on about 49 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4797 runs when it is late
OO 4797 often beats the schedule: 104 of 338 completed flights, 31%, arrived 15 minutes or more early. The 50 late arrivals split 20 under half an hour, 11 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early104 flights30.8%
- Within 15 min184 flights54.4%
- 15–29 min late20 flights5.9%
- 30–59 min late11 flights3.3%
- 1–2 hours late8 flights2.4%
- 2+ hours late11 flights3.3%
Scale runs 0% to 100%.
Share of 338 completed flights by arrival against schedule.
10 of 52 late departures made up the time and arrived on time, 19% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for OO 4797
The latest arrival of the period was on 23 October 2025, 4 hours 18 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across October, June, January, December and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 October 2025 | 4 hours 18 minutes | National Airspace System |
| 25 June 2026 | 3 hours 42 minutes | Extreme weather |
| 23 January 2026 | 3 hours 37 minutes | Carrier |
| 19 December 2025 | 3 hours 23 minutes | Late-arriving aircraft |
| 24 July 2026 | 3 hours 15 minutes | Carrier |
Delay causes
Why OO 4797 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,540 reported delay minutes.
- 41%Carrier
- 33%Late-arriving aircraft
- 16%National Airspace System
- 9%Extreme weather
- 1%Security
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,454 of the 3,540 delay minutes reported here. The split is drawn from 3,540 delay minutes reported on OO 4797.
Cancellations sit at 1.16% against a national 1.89%, which is ordinary. Diversions add another 0.58%.
Connections and routes
What a delay on this flight costs
5.6% 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.
Every one of the 344 flights under OO 4797 in the data flew DEN to CPR. 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. 344 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 4797
For a booking, OO 4797 has one of the better records a US domestic flight can show: 85.2% on time and 1.16% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to CPR, every carrier and departure
- CPR to DEN, the return direction
- SkyWest Airlines 4687 on the same route78.8%
- SkyWest Airlines 5294 on the same route73.7%
- SkyWest Airlines 5802 on the same route71.5%
- SkyWest Airlines 5743 on the same route82.4%
- SkyWest Airlines 5226 on the same route79.6%
- 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
- 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.