Flight number record
OO 3743
SkyWest Airlines · San Diego to Los Angeles
- Route
- SAN → LAX
- Departs
- 06:20
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3743, 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 3743 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 363 flights, with a median arrival 11 minutes early.
Set against the rest of the country, OO 3743's record is 17 points better than the US average of 77.3%. That gap is worth roughly 172 fewer late arrivals for every thousand flights.
Key figures
On time
94.5%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
47 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
1.1%
National rate is 8.3%
These figures cover 363 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 3743 flies
OO 3743 flies SAN to LAX without a single fixed slot. Its most common scheduled departure was 06:20, used on 185 of 363 flights, with 06:15 (113 flights) and 06:35 (61 flights) next.
- Departs 06:20185 flights51.0%
- Departs 06:15113 flights31.1%
- Departs 06:3561 flights16.8%
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 06:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 3743 runs 5 points better at 94.5%. 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 3743 next to SAN to LAX
Every carrier on SAN to LAX combined arrived on time 87.4% of the time across 2,452 flights, so OO 3743 is 7 points ahead of it. SkyWest flew 2,163 flights on the same city pair under all its flight numbers, including this one, and those ran 87.2% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3743thin sample | 363 | 94.5% | 47 min | 0.55% | A+ |
| All SkyWest Airlines on SAN–LAX | 2,163 | 87.2% | 70 min | 1.06% | A |
| All carriers on SAN–LAX | 2,452 | 87.4% | 71 min | 0.94% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3743 quarter by quarter
Quarter by quarter OO 3743 held fairly steady: 92.2% in Oct–Dec 2025, 92.1% in Jan–Mar 2026, 94.5% in Apr–Jun 2026 and 98.4% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights—
- Oct–Dec 202591 flights92.2%
- Jan–Mar 202689 flights92.1%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights98.4%
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 3743 ranged from 92.2% on Friday to 96.2% on Tuesday. With about 52 flights behind each day, a spread of 4 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 3743 runs when it is late
OO 3743 often beats the schedule: 131 of 361 completed flights, 36%, arrived 15 minutes or more early. Most of the lateness is short. 10 of the 20 late arrivals were under half an hour behind, and 4 reached an hour or more.
- 15+ min early131 flights36.3%
- Within 15 min210 flights58.2%
- 15–29 min late10 flights2.8%
- 30–59 min late6 flights1.7%
- 1–2 hours late2 flights0.6%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Only 16 of 361 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for OO 3743
The latest arrival of the period was on 9 November 2025, 2 hours 54 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 November 2025 | 2 hours 54 minutes | Extreme weather |
| 29 October 2025 | 2 hours 13 minutes | Extreme weather |
| 1 May 2026 | 1 hour 40 minutes | Carrier |
| 24 June 2026 | 1 hour 22 minutes | Carrier |
| 10 November 2025 | 59 minutes | Carrier |
Delay causes
Why OO 3743 runs late
Carrier accounts for 52% of the 943 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 41%Extreme weather
- 7%National Airspace System
Extreme weather accounts for 41% 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 6.8 times the usual weather exposure. The split is drawn from 943 delay minutes reported on OO 3743.
Cancellations are rare at 0.55%, 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 1.1% 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.
Every one of the 363 flights under OO 3743 in the data flew SAN to LAX. The number was not reused on any other city pair, which makes this a clean record of one route.
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 3743
For a booking, OO 3743 has one of the better records a US domestic flight can show: 94.5% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SAN to LAX, every carrier and departure
- LAX to SAN, the return direction
- SkyWest Airlines 4087 on the same route84.9%
- San Diego International (SAN) delay statistics
- 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.