Flight number record
OO 3450
SkyWest Airlines · San Francisco to Santa Ana
- Route
- SFO → SNA
- Departs
- 09:28
- Flights
- 280
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3450, 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 3450 lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That rests on 280 flights, with a median arrival 4 minutes early.
Key figures
On time
76.4%
Arrivals under 15 minutes late, of 276 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.07%
National rate is 1.89%
1 hour+ late
7.2%
National rate is 8.3%
These figures cover 280 flights between September 2025 and August 2026. The median arrival is 4 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 3450 flies
OO 3450 flies SFO to SNA without a single fixed slot. Its most common scheduled departure was 09:28, used on 81 of 280 flights, with 07:00 (71 flights) and 08:14 (33 flights) next.
- Departs 09:2881 flights28.9%
- Departs 07:0071 flights25.4%
- Departs 08:1433 flights11.8%
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 09:28 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 3450 runs 8 points worse at 76.4%. 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 3450 next to SFO to SNA
Every carrier on SFO to SNA combined arrived on time 77.4% of the time across 4,701 flights, so OO 3450 is about level with it. SkyWest flew 3,497 flights on the same city pair under all its flight numbers, including this one, and those ran 76.9% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3450thin sample | 280 | 76.4% | 53 min | 1.07% | B |
| All SkyWest Airlines on SFO–SNA | 3,497 | 76.9% | 61 min | 1.69% | B |
| All carriers on SFO–SNA | 4,701 | 77.4% | 61 min | 1.43% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3450 quarter by quarter
OO 3450 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 54.8%, a swing of 39 points on roughly 56 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 flights93.3%
- Oct–Dec 202561 flights82.8%
- Jan–Mar 202687 flights87.4%
- Apr–Jun 202660 flights61.0%
- Jul–Sep 202642 flights54.8%
Scale runs 45% to 100%.
By weekday, OO 3450 did best on Wednesday at 83.3% on time and worst on Sunday at 67.7%. Each day rests on about 40 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3450 runs when it is late
The 65 late arrivals split 24 under half an hour, 21 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early55 flights19.9%
- Within 15 min156 flights56.5%
- 15–29 min late24 flights8.7%
- 30–59 min late21 flights7.6%
- 1–2 hours late15 flights5.4%
- 2+ hours late5 flights1.8%
Scale runs 0% to 100%.
Share of 276 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 60 departures that left 15 minutes late or more, only 7 made it up before arrival. 12 flights left on time and still arrived late.
The worst days
Worst days for OO 3450
The latest arrival of the period was on 22 December 2025, 4 hours 23 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 December 2025 | 4 hours 23 minutes | Late-arriving aircraft |
| 19 February 2026 | 2 hours 48 minutes | Late-arriving aircraft |
| 26 February 2026 | 2 hours 43 minutes | Late-arriving aircraft |
| 19 May 2026 | 2 hours 35 minutes | National Airspace System |
| 1 August 2026 | 2 hours 7 minutes | Late-arriving aircraft |
Delay causes
Why OO 3450 runs late
Late-arriving aircraft accounts for 49% of the 3,422 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 37%National Airspace System
- 12%Carrier
- 2%Extreme weather
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,422 reported delay minutes here, that single category outweighs weather by 27 to one. The split is drawn from 3,422 delay minutes reported on OO 3450.
Cancellations sit at 1.07% against a national 1.89%, which is ordinary. Diversions add another 0.36%.
Connections and routes
What a delay on this flight costs
7.2% 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 roughly 55 minutes, which a normal layover absorbs.
The same number turns up on three other city pairs in the data, including SNA to SFO (157), SJC to SNA (28) and OAK to SNA (2), but none flew often enough under OO 3450 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to SNA only.
One caution: this is a thin sample. 280 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 3450
For a booking, read OO 3450 as 76.4% on time with 1.07% cancelled over 280 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SFO to SNA, every carrier and departure
- SNA to SFO, the return direction
- SkyWest Airlines 5440 on the same route77.3%
- United Airlines 589 on the same route88.2%
- United Airlines 643 on the same route78.8%
- SkyWest Airlines 3494 on the same route80.6%
- San Francisco International (SFO) delay statistics
- John Wayne Airport (SNA) 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.