Flight number record
OO 4684
SkyWest Airlines · Denver to Santa Fe
- Route
- DEN → SAF
- Departs
- 19:20
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4684, 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 4684 sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 363 flights, with a median arrival 7 minutes early.
Key figures
On time
75.8%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
1.65%
National rate is 1.89%
1 hour+ late
11.5%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 11.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4684 flies
OO 4684 flies DEN to SAF without a single fixed slot. Its most common scheduled departure was 19:20, used on 118 of 363 flights, with 20:40 (91 flights) and 19:05 (45 flights) next.
- Departs 19:20118 flights32.5%
- Departs 20:4091 flights25.1%
- Departs 19:0545 flights12.4%
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 19:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 4684 runs 8 points better at 75.8%. 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 4684 next to DEN to SAF
Every carrier on DEN to SAF combined arrived on time 81.0% of the time across 1,684 flights, so OO 4684 is 5 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4684thin sample | 363 | 75.8% | 93 min | 1.65% | B |
| All SkyWest Airlines on DEN–SAF | 1,684 | 81.0% | 79 min | 1.01% | B |
| All carriers on DEN–SAF | 1,684 | 81.0% | 79 min | 1.01% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4684 quarter by quarter
OO 4684 did not run the same all year. Its best quarter was Oct–Dec 2025 at 84.4% on time and its weakest Jul–Sep 2026 at 49.2%, a swing of 35 points on roughly 73 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 flights83.3%
- Oct–Dec 202591 flights84.4%
- Jan–Mar 202690 flights79.1%
- Apr–Jun 202691 flights79.1%
- Jul–Sep 202661 flights49.2%
Scale runs 40% to 90%.
By weekday, OO 4684 did best on Tuesday at 82.7% on time and worst on Thursday at 67.3%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4684 runs when it is late
OO 4684 often beats the schedule: 99 of 356 completed flights, 28%, arrived 15 minutes or more early. The 86 late arrivals split 20 under half an hour, 25 between 30 and 60 minutes, and 41 an hour or more.
- 15+ min early99 flights27.8%
- Within 15 min171 flights48.0%
- 15–29 min late20 flights5.6%
- 30–59 min late25 flights7.0%
- 1–2 hours late18 flights5.1%
- 2+ hours late23 flights6.5%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
13 of 87 late departures made up the time and arrived on time, 15% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for OO 4684
The latest arrival of the period was on 9 July 2026, 13 hours 1 minute behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across July, December, March, August and May, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 July 2026 | 13 hours 1 minute | Extreme weather |
| 13 December 2025 | 12 hours 5 minutes | Carrier |
| 6 March 2026 | 4 hours 30 minutes | National Airspace System |
| 3 August 2026 | 3 hours 42 minutes | Extreme weather |
| 22 May 2026 | 3 hours 40 minutes | Late-arriving aircraft |
Delay causes
Why OO 4684 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 8,013 reported delay minutes.
- 28%Late-arriving aircraft
- 28%Carrier
- 26%National Airspace System
- 19%Extreme weather
Extreme weather accounts for 19% 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 3.1 times the usual weather exposure. The split is drawn from 8,013 delay minutes reported on OO 4684.
Cancellations sit at 1.65% against a national 1.89%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
11.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The same number turns up on two other city pairs in the data, including OMA to IAH (1) and SFO to SLC (1), but none flew often enough under OO 4684 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to SAF only.
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 4684
For a booking, OO 4684 is one of the weaker ways to fly DEN to SAF: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- DEN to SAF, every carrier and departure
- SAF to DEN, the return direction
- SkyWest Airlines 5310 on the same route77.9%
- SkyWest Airlines 5643 on the same route78.6%
- SkyWest Airlines 4731 on the same route89.6%
- 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
- How often a connection fails at the major US hubs
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.