Flight number record
OO 3929
SkyWest Airlines · Los Angeles to Reno
- Route
- LAX → RNO
- Departs
- 21:59
- Flights
- 356
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3929, 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 3929 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 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 356 flights, with a median arrival 11 minutes early.
Set against the rest of the country, OO 3929's record is 11 points better than the US average of 77.3%. That gap is worth roughly 114 fewer late arrivals for every thousand flights.
Key figures
On time
88.7%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
3.1%
National rate is 8.3%
These figures cover 356 flights between September 2025 and August 2026. The median arrival is 11 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 3929 flies
OO 3929 flies LAX to RNO without a single fixed slot. Its most common scheduled departure was 21:59, used on 81 of 356 flights, with 20:45 (61 flights) and 21:20 (53 flights) next.
- Departs 21:5981 flights22.8%
- Departs 20:4561 flights17.1%
- Departs 21:2053 flights14.9%
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 21:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 3929 runs 19 points better at 88.7%. 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 3929 next to LAX to RNO
Every carrier on LAX to RNO combined arrived on time 89.1% of the time across 2,470 flights, so OO 3929 is about level with it. SkyWest flew 1,973 flights on the same city pair under all its flight numbers, including this one, and those ran 91.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3929thin sample | 356 | 88.7% | 64 min | 0.28% | A+ |
| All SkyWest Airlines on LAX–RNO | 1,973 | 91.7% | 63 min | 0.30% | A+ |
| All carriers on LAX–RNO | 2,470 | 89.1% | 56 min | 0.40% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3929 quarter by quarter
Quarter by quarter OO 3929 held fairly steady: 90.0% in Jul–Sep 2025, 90.9% in Oct–Dec 2025, 89.7% in Jan–Mar 2026, 86.5% in Apr–Jun 2026 and 86.9% in Jul–Sep 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202588 flights90.9%
- Jan–Mar 202688 flights89.7%
- Apr–Jun 202689 flights86.5%
- Jul–Sep 202661 flights86.9%
Scale runs 80% to 95%.
By weekday, OO 3929 did best on Tuesday at 94.2% on time and worst on Saturday at 81.2%. Each day rests on about 51 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3929 runs when it is late
OO 3929 often beats the schedule: 145 of 355 completed flights, 41%, arrived 15 minutes or more early. The 40 late arrivals split 16 under half an hour, 13 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early145 flights40.8%
- Within 15 min170 flights47.9%
- 15–29 min late16 flights4.5%
- 30–59 min late13 flights3.7%
- 1–2 hours late7 flights2.0%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
4 of 33 late departures made up the time and arrived on time, 12% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for OO 3929
The latest arrival of the period was on 24 March 2026, 12 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 March 2026 | 12 hours 25 minutes | Carrier |
| 12 June 2026 | 2 hours 14 minutes | Carrier |
| 2 May 2026 | 2 hours 1 minute | Carrier |
| 14 September 2025 | 2 hours | Carrier |
| 17 February 2026 | 1 hour 59 minutes | Carrier |
Delay causes
Why OO 3929 runs late
Carrier accounts for 85% of the 2,540 delay minutes carriers reported here, and the remaining four split what is left.
- 85%Carrier
- 11%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 11% 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 2,540 delay minutes reported on OO 3929.
Cancellations are rare at 0.28%, 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 3.1% 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 two other city pairs in the data, including CLE to DTW (1) and DTW to CLE (1), but none flew often enough under OO 3929 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to RNO only.
One caution: this is a thin sample. 356 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 3929
For a booking, OO 3929 has one of the better records a US domestic flight can show: 88.7% on time and 0.28% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAX to RNO, every carrier and departure
- RNO to LAX, the return direction
- SkyWest Airlines 4099 on the same route95.3%
- SkyWest Airlines 4126 on the same route89.4%
- SkyWest Airlines 5410 on the same route94.8%
- Los Angeles International (LAX) 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.