Flight number record
OO 4731
SkyWest Airlines · Denver to Santa Fe
- Route
- DEN → SAF
- Departs
- 08:25
- Flights
- 283
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4731, 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 4731 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 283 flights, with a median arrival 12 minutes early.
Set against the rest of the country, OO 4731's record is 12 points better than the US average of 77.3%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.
Key figures
On time
89.6%
Arrivals under 15 minutes late, of 280 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
1.06%
National rate is 1.89%
1 hour+ late
2.9%
National rate is 8.3%
These figures cover 283 flights between September 2025 and August 2026. The median arrival is 12 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 4731 flies
OO 4731 flies DEN to SAF without a single fixed slot. Its most common scheduled departure was 08:25, used on 103 of 283 flights, with 08:05 (80 flights) and 08:01 (53 flights) next.
- Departs 08:25103 flights36.4%
- Departs 08:0580 flights28.3%
- Departs 08:0153 flights18.7%
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 08:25 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4731 runs 6 points better at 89.6%. 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 4731 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 4731 is 9 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4731thin sample | 283 | 89.6% | 67 min | 1.06% | A |
| 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 4731 quarter by quarter
OO 4731 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Oct–Dec 2025 at 83.9%, a swing of 13 points on roughly 57 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 202564 flights83.9%
- Jan–Mar 202686 flights87.1%
- Apr–Jun 202641 flights95.1%
- Jul–Sep 202662 flights91.9%
Scale runs 75% to 100%.
By weekday, OO 4731 did best on Tuesday at 97.3% on time and worst on Sunday at 82.9%. Each day rests on about 40 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4731 runs when it is late
OO 4731 often beats the schedule: 111 of 280 completed flights, 40%, arrived 15 minutes or more early. The 29 late arrivals split 12 under half an hour, 9 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early111 flights39.6%
- Within 15 min140 flights50.0%
- 15–29 min late12 flights4.3%
- 30–59 min late9 flights3.2%
- 1–2 hours late4 flights1.4%
- 2+ hours late4 flights1.4%
Scale runs 0% to 100%.
Share of 280 completed flights by arrival against schedule.
A late pushback is often recovered here: of 32 departures that left 15 minutes late or more, 10 still arrived on time. 7 flights left on time and still arrived late.
The worst days
Worst days for OO 4731
The latest arrival of the period was on 18 March 2026, 5 hours 52 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 March 2026 | 5 hours 52 minutes | Carrier |
| 5 October 2025 | 5 hours 14 minutes | Carrier |
| 18 December 2025 | 2 hours 14 minutes | Carrier |
| 6 March 2026 | 2 hours 1 minute | National Airspace System |
| 2 August 2026 | 1 hour 49 minutes | Carrier |
Delay causes
Why OO 4731 runs late
Carrier accounts for 76% of the 1,931 delay minutes carriers reported here, and the remaining four split what is left.
- 76%Carrier
- 15%Late-arriving aircraft
- 8%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 76%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,475 of the 1,931 delay minutes reported here. The split is drawn from 1,931 delay minutes reported on OO 4731.
Cancellations sit at 1.06% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.9% 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 same number turns up on six other city pairs in the data, including ATW to ORD (29), ORD to RAP (21) and BUF to ORD (16), but none flew often enough under OO 4731 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. 283 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 4731
For a booking, OO 4731 has one of the better records a US domestic flight can show: 89.6% on time and 1.06% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to SAF, every carrier and departure
- SAF to DEN, the return direction
- SkyWest Airlines 4684 on the same route75.8%
- SkyWest Airlines 5310 on the same route77.9%
- SkyWest Airlines 5643 on the same route78.6%
- 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.