Flight number record
OO 3846
SkyWest Airlines · Los Angeles to Tucson
- Route
- LAX → TUS
- Departs
- 19:00
- Flights
- 289
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3846, 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 3846 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 289 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 3846's record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 289 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
6.9%
National rate is 8.3%
These figures cover 289 flights between September 2025 and August 2026. The median arrival is 10 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 3846 flies
OO 3846 flies LAX to TUS without a single fixed slot. Its most common scheduled departure was 19:00, used on 64 of 289 flights, with 19:21 (57 flights) and 19:35 (36 flights) next.
- Departs 19:0064 flights22.1%
- Departs 19:2157 flights19.7%
- Departs 19:3536 flights12.5%
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 19:00 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3846 runs 16 points better at 84.4%. 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 3846 next to LAX to TUS
Every carrier on LAX to TUS combined arrived on time 79.7% of the time across 2,619 flights, so OO 3846 is 5 points ahead of it. SkyWest flew 2,127 flights on the same city pair under all its flight numbers, including this one, and those ran 83.4% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3846thin sample | 289 | 84.4% | 69 min | 0.00% | B+ |
| All SkyWest Airlines on LAX–TUS | 2,127 | 83.4% | 84 min | 0.42% | B+ |
| All carriers on LAX–TUS | 2,619 | 79.7% | 73 min | 0.38% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3846 quarter by quarter
Quarter by quarter OO 3846 held fairly steady: 80.9% in Oct–Dec 2025, 84.3% in Jan–Mar 2026, 85.7% in Apr–Jun 2026 and 90.3% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202517 flights—
- Oct–Dec 202568 flights80.9%
- Jan–Mar 202651 flights84.3%
- Apr–Jun 202691 flights85.7%
- Jul–Sep 202662 flights90.3%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 3846 did best on Tuesday at 97.7% on time and worst on Sunday at 75.6%. Each day rests on about 41 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3846 runs when it is late
OO 3846 often beats the schedule: 97 of 289 completed flights, 34%, arrived 15 minutes or more early. The 45 late arrivals split 13 under half an hour, 12 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early97 flights33.6%
- Within 15 min147 flights50.9%
- 15–29 min late13 flights4.5%
- 30–59 min late12 flights4.2%
- 1–2 hours late13 flights4.5%
- 2+ hours late7 flights2.4%
Scale runs 0% to 100%.
Share of 289 completed flights by arrival against schedule.
6 of 47 late departures made up the time and arrived on time, 13% of them. Only 4 left on time and still arrived late.
The worst days
Worst days for OO 3846
The latest arrival of the period was on 30 July 2026, 5 hours 55 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 July 2026 | 5 hours 55 minutes | Carrier |
| 6 June 2026 | 3 hours 24 minutes | Carrier |
| 13 March 2026 | 2 hours 46 minutes | Carrier |
| 20 June 2026 | 2 hours 21 minutes | Extreme weather |
| 12 October 2025 | 2 hours 19 minutes | Extreme weather |
Delay causes
Why OO 3846 runs late
Carrier accounts for 74% of the 3,106 delay minutes carriers reported here, and the remaining four split what is left.
- 74%Carrier
- 23%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 23% 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 3.8 times the usual weather exposure. The split is drawn from 3,106 delay minutes reported on OO 3846.
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
6.9% 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 three other city pairs in the data, including MSP to MCI (19), MCI to MSP (19) and SLC to BOI (5), but none flew often enough under OO 3846 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to TUS only.
One caution: this is a thin sample. 289 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 3846
For a booking, read OO 3846 as 84.4% on time with 0.00% cancelled over 289 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAX to TUS, every carrier and departure
- TUS to LAX, the return direction
- SkyWest Airlines 3766 on the same route91.6%
- SkyWest Airlines 3776 on the same route81.0%
- 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.