Flight number record
OO 4681
SkyWest Airlines · Denver to Lexington
- Route
- DEN → LEX
- Departs
- 17:28
- Flights
- 261
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4681, 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 4681 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 roughly 50 minutes on average. That rests on 261 flights, with a median arrival 8 minutes early.
Key figures
On time
80.7%
Arrivals under 15 minutes late, of 259 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
0.77%
National rate is 1.89%
1 hour+ late
4.6%
National rate is 8.3%
These figures cover 261 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 4681 flies
OO 4681 flies DEN to LEX without a single fixed slot. Its most common scheduled departure was 17:28, used on 45 of 261 flights, with 17:25 (40 flights) and 17:40 (37 flights) next.
- Departs 17:2845 flights17.2%
- Departs 17:2540 flights15.3%
- Departs 17:4037 flights14.2%
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 17:28 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 4681 runs 13 points better at 80.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 4681 next to DEN to LEX
Every carrier on DEN to LEX combined arrived on time 71.5% of the time across 365 flights, so OO 4681 is 9 points ahead of it. 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 4681thin sample | 261 | 80.7% | 48 min | 0.77% | B+ |
| All SkyWest Airlines on DEN–LEXthin sample | 262 | 80.8% | 48 min | 0.76% | B+ |
| All carriers on DEN–LEX | 365 | 71.5% | 64 min | 0.82% | C+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4681 quarter by quarter
OO 4681 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.0% on time and its weakest Jul–Sep 2025 at 76.7%, a swing of 11 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 flights76.7%
- Oct–Dec 202591 flights81.3%
- Jan–Mar 202690 flights77.3%
- Apr–Jun 202650 flights88.0%
Scale runs 70% to 95%.
By weekday, OO 4681 did best on Tuesday at 86.8% on time and worst on Monday at 71.1%. Each day rests on about 37 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4681 runs when it is late
OO 4681 often beats the schedule: 92 of 259 completed flights, 36%, arrived 15 minutes or more early. The 50 late arrivals split 21 under half an hour, 17 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early92 flights35.5%
- Within 15 min117 flights45.2%
- 15–29 min late21 flights8.1%
- 30–59 min late17 flights6.6%
- 1–2 hours late11 flights4.2%
- 2+ hours late1 flights0.4%
Scale runs 0% to 100%.
Share of 259 completed flights by arrival against schedule.
8 of 45 late departures made up the time and arrived on time, 18% of them. In the other direction, 13 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 LEX.
The worst days
Worst days for OO 4681
The latest arrival of the period was on 17 February 2026, 2 hours 4 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across February, March, January and November, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 February 2026 | 2 hours 4 minutes | National Airspace System |
| 6 March 2026 | 1 hour 57 minutes | Late-arriving aircraft |
| 15 March 2026 | 1 hour 57 minutes | National Airspace System |
| 30 January 2026 | 1 hour 54 minutes | Carrier |
| 30 November 2025 | 1 hour 49 minutes | Extreme weather |
Delay causes
Why OO 4681 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 2,379 reported delay minutes.
- 40%Carrier
- 33%National Airspace System
- 15%Late-arriving aircraft
- 12%Extreme weather
Extreme weather accounts for 12% 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 1.9 times the usual weather exposure. The split is drawn from 2,379 delay minutes reported on OO 4681.
Cancellations are rare at 0.77%, 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
Badly late arrivals are rare here: only 4.6% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,086 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on five other city pairs in the data, including GRB to ORD (47), IAH to BNA (24) and ORD to STL (16), but none flew often enough under OO 4681 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to LEX only.
One caution: this is a thin sample. 261 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 4681
For a booking, read OO 4681 as 80.7% on time with 0.77% cancelled over 261 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- 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.