Flight number record
UA 2305
United Airlines · Santa Barbara to San Francisco
- Route
- SBA → SFO
- Departs
- 14:09
- Flights
- 313
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2305, check with United Airlines.
UA 2305 earns an F+, which is as low as this site's scale goes for a reason. Only 53.5% of flights arrive inside the 15-minute window, 24 points worse than the national rate of 77.6%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 313 flights, with a median arrival 12 minutes late.
The national on-time rate over the same period is 77.6%, so UA 2305 runs 24 points behind the country as a whole. Across a thousand flights that is about 241 extra late arrivals.
Key figures
On time
53.5%
Arrivals under 15 minutes late, of 312 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
0.32%
National rate is 1.81%
1 hour+ late
14.1%
National rate is 8.1%
These figures cover 313 flights between July 2025 and June 2026. Beyond the headline rate, 14.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When UA 2305 flies
UA 2305 flies SBA to SFO without a single fixed slot. Its most common scheduled departure was 14:09, used on 74 of 313 flights, with 14:17 (57 flights) and 13:58 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 14:0974 flights23.6%
- Departs 14:1757 flights18.2%
- Departs 13:5841 flights13.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:09 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2305 runs 19 points worse at 53.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 2305 next to SBA to SFO
Every carrier on SBA to SFO combined arrived on time 62.9% of the time across 1,611 flights, so UA 2305 is 9 points behind it. United flew 1,032 flights on the same city pair under all its flight numbers, including this one, and those ran 68.3% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 26 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2305thin sample | 313 | 53.5% | 71 min | 0.32% | F+ |
| All United Airlines on SBA–SFO | 1,032 | 68.3% | 71 min | 1.07% | C |
| All carriers on SBA–SFO | 1,611 | 62.9% | 70 min | 1.49% | D |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2305 quarter by quarter
UA 2305 did not run the same all year. Its best quarter was Jul–Sep 2025 at 81.4% on time and its weakest Apr–Jun 2026 at 19.8%, a swing of 62 points on roughly 78 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 202543 flights81.4%
- Oct–Dec 202592 flights57.6%
- Jan–Mar 202687 flights70.9%
- Apr–Jun 202691 flights19.8%
Scale runs 10% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2305 ranged from 48.9% on Wednesday to 60.5% on Tuesday. With about 45 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 2305 runs late
One category carries most of the weight here. National Airspace System accounts for 69% of the 10,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 69%National Airspace System
- 23%Late-arriving aircraft
- 8%Carrier
- 1%Extreme weather
69% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 7,100 minutes out of 10,000, against a national NAS share of 21%. The split is drawn from 10,251 delay minutes reported on UA 2305.
Cancellations are rare at 0.32%, below the national 1.81% 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
UA 2305 is not only a SBA to SFO flight. It also flew SFO to IAH (300 flights, 83.3% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 313 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SFO to IAHthin sample | 300 | 83.3% | 65 min | 0.00% | B+ |
What to do with this
Booking UA 2305
For a booking, UA 2305 is a flight to put a long connection behind. 14.1% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- SBA to SFO, every carrier and departure
- SFO to SBA, the return direction
- San Francisco International (SFO) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
A flight number here means United 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.