Flight number record
OO 5310
SkyWest Airlines · Denver to Santa Fe
- Route
- DEN → SAF
- Departs
- 11:20
- Flights
- 344
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5310, 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 5310 lands a B+, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 344 flights, with a median arrival 7 minutes early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
7.8%
National rate is 8.3%
These figures cover 344 flights between September 2025 and August 2026. The median arrival is 7 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 5310 flies
OO 5310 flies DEN to SAF without a single fixed slot. Its most common scheduled departure was 11:20, used on 164 of 344 flights, with 11:28 (82 flights) and 11:15 (58 flights) next.
- Departs 11:20164 flights47.7%
- Departs 11:2882 flights23.8%
- Departs 11:1558 flights16.9%
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 11:20 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 5310 runs level with that at 77.9%. 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 5310 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 5310 is 3 points behind it. Across its whole network SkyWest Airlines managed 78.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5310thin sample | 344 | 77.9% | 73 min | 0.00% | 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 5310 quarter by quarter
OO 5310 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jan–Mar 2026 at 66.7%, a swing of 17 points on roughly 69 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 202592 flights82.6%
- Jan–Mar 202690 flights66.7%
- Apr–Jun 202691 flights81.3%
- Jul–Sep 202641 flights80.5%
Scale runs 60% to 90%.
By weekday, OO 5310 did best on Saturday at 85.7% on time and worst on Sunday at 67.3%. 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 5310 runs when it is late
OO 5310 often beats the schedule: 107 of 344 completed flights, 31%, arrived 15 minutes or more early. The 76 late arrivals split 15 under half an hour, 34 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early107 flights31.1%
- Within 15 min161 flights46.8%
- 15–29 min late15 flights4.4%
- 30–59 min late34 flights9.9%
- 1–2 hours late13 flights3.8%
- 2+ hours late14 flights4.1%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 75 departures that left 15 minutes late or more, only 7 made it up before arrival. 8 flights left on time and still arrived late.
The worst days
Worst days for OO 5310
The latest arrival of the period was on 19 December 2025, 5 hours 53 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across December, January, April and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 December 2025 | 5 hours 53 minutes | Late-arriving aircraft |
| 4 January 2026 | 4 hours 20 minutes | Carrier |
| 17 April 2026 | 3 hours 45 minutes | Extreme weather |
| 11 March 2026 | 3 hours 29 minutes | Carrier |
| 6 March 2026 | 3 hours 19 minutes | Extreme weather |
Delay causes
Why OO 5310 runs late
Carrier accounts for 44% of the 5,510 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 33%Late-arriving aircraft
- 12%National Airspace System
- 10%Extreme weather
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,426 of the 5,510 delay minutes reported here. The split is drawn from 5,510 delay minutes reported on OO 5310.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
7.8% 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.
The same number turns up on one other city pair in the data, including OKC to IAH (1), but none flew often enough under OO 5310 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. 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 5310
For a booking, read OO 5310 as 77.9% on time with 0.00% cancelled over 344 flights. Those are rates from the past twelve months, not a forecast for any particular 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 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
- 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.