Flight number record
OO 3375
SkyWest Airlines · San Francisco to Boise
- Route
- SFO → BOI
- Departs
- 19:25
- Flights
- 275
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3375, 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 3375 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 275 flights, with a median arrival 10 minutes early.
Key figures
On time
75.2%
Arrivals under 15 minutes late, of 274 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
11.3%
National rate is 8.3%
These figures cover 275 flights between September 2025 and August 2026. Beyond the headline rate, 11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 3375 flies
OO 3375 flies SFO to BOI without a single fixed slot. Its most common scheduled departure was 19:25, used on 89 of 275 flights, with 19:24 (62 flights) and 18:56 (34 flights) next.
- Departs 19:2589 flights32.4%
- Departs 19:2462 flights22.5%
- Departs 18:5634 flights12.4%
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 19:25 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3375 runs 7 points better at 75.2%. 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 3375 next to SFO to BOI
Every carrier on SFO to BOI combined arrived on time 75.4% of the time across 1,740 flights, so OO 3375 is about level with it. SkyWest flew 1,510 flights on the same city pair under all its flight numbers, including this one, and those ran 75.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3375thin sample | 275 | 75.2% | 77 min | 0.00% | B+ |
| All SkyWest Airlines on SFO–BOI | 1,510 | 75.7% | 75 min | 0.26% | B+ |
| All carriers on SFO–BOI | 1,740 | 75.4% | 72 min | 0.29% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3375 quarter by quarter
OO 3375 did not run the same all year. Its best quarter was Jan–Mar 2026 at 80.0% on time and its weakest Apr–Jun 2026 at 63.8%, a swing of 16 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.
- Oct–Dec 202565 flights75.0%
- Jan–Mar 202690 flights80.0%
- Apr–Jun 202658 flights63.8%
- Jul–Sep 202662 flights79.0%
Scale runs 55% to 85%.
By weekday, OO 3375 did best on Friday at 82.5% on time and worst on Thursday at 62.2%. Each day rests on about 39 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3375 runs when it is late
OO 3375 often beats the schedule: 105 of 274 completed flights, 38%, arrived 15 minutes or more early. The 68 late arrivals split 20 under half an hour, 17 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early105 flights38.3%
- Within 15 min101 flights36.9%
- 15–29 min late20 flights7.3%
- 30–59 min late17 flights6.2%
- 1–2 hours late16 flights5.8%
- 2+ hours late15 flights5.5%
Scale runs 0% to 100%.
Share of 274 completed flights by arrival against schedule.
11 of 73 late departures made up the time and arrived on time, 15% of them. 6 flights left on time and still arrived late.
The worst days
Worst days for OO 3375
The latest arrival of the period was on 14 December 2025, 5 hours 55 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 December 2025 | 5 hours 55 minutes | Carrier |
| 2 January 2026 | 4 hours 46 minutes | Late-arriving aircraft |
| 23 December 2025 | 4 hours 24 minutes | National Airspace System |
| 11 July 2026 | 3 hours 55 minutes | Late-arriving aircraft |
| 19 March 2026 | 3 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why OO 3375 runs late
Late-arriving aircraft accounts for 48% of the 5,244 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Late-arriving aircraft
- 35%National Airspace System
- 12%Carrier
- 5%Extreme weather
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,244 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 5,244 delay minutes reported on OO 3375.
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
11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 522 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on three other city pairs in the data, including BLI to SEA (33), EUG to SEA (27) and SJC to BOI (2), but none flew often enough under OO 3375 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to BOI only.
One caution: this is a thin sample. 275 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 3375
For a booking, read OO 3375 as 75.2% on time with 0.00% cancelled over 275 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SFO to BOI, every carrier and departure
- BOI to SFO, the return direction
- San Francisco International (SFO) 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.