Flight number record
UA 2305
United Airlines · Santa Barbara to San Francisco
- Route
- SBA → SFO
- Departs
- 13:58
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 51.2% of flights arrive inside the 15-minute window, 26 points worse than the national rate of 77.3%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 362 flights, with a median arrival 14 minutes late.
The national on-time rate over the same period is 77.3%, so UA 2305 runs 26 points behind the country as a whole. Across a thousand flights that is about 261 extra late arrivals.
Key figures
On time
51.2%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
14.7%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. Beyond the headline rate, 14.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2305 flies
UA 2305 flies SBA to SFO without a single fixed slot. Its most common scheduled departure was 13:58, used on 82 of 362 flights, with 14:09 (61 flights) and 14:17 (57 flights) next.
- Departs 13:5882 flights22.7%
- Departs 14:0961 flights16.9%
- Departs 14:1757 flights15.7%
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 13:58 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 2305 runs 27 points worse at 51.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
UA 2305 next to SBA to SFO
Every carrier on SBA to SFO combined arrived on time 61.3% of the time across 1,677 flights, so UA 2305 is 10 points behind it. United flew 985 flights on the same city pair under all its flight numbers, including this one, and those ran 65.2% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 28 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2305thin sample | 362 | 51.2% | 68 min | 0.28% | F+ |
| All United Airlines on SBA–SFO | 985 | 65.2% | 72 min | 0.71% | C+ |
| All carriers on SBA–SFO | 1,677 | 61.3% | 71 min | 1.13% | D |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | 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 83.3% on time and its weakest Apr–Jun 2026 at 19.8%, a swing of 64 points on roughly 72 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 flights83.3%
- Oct–Dec 202592 flights57.6%
- Jan–Mar 202687 flights70.9%
- Apr–Jun 202691 flights19.8%
- Jul–Sep 202662 flights45.2%
Scale runs 10% to 90%.
By weekday, UA 2305 did best on Tuesday at 61.2% on time and worst on Sunday at 48.1%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2305 runs when it is late
The 176 late arrivals split 51 under half an hour, 72 between 30 and 60 minutes, and 53 an hour or more.
- 15+ min early36 flights10.0%
- Within 15 min149 flights41.3%
- 15–29 min late51 flights14.1%
- 30–59 min late72 flights19.9%
- 1–2 hours late34 flights9.4%
- 2+ hours late19 flights5.3%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 147 departures that left 15 minutes late or more, only 15 made it up before arrival. In the other direction, 44 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for UA 2305
The latest arrival of the period was on 25 December 2025, 21 hours 1 minute behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 December 2025 | 21 hours 1 minute | National Airspace System |
| 16 March 2026 | 6 hours 14 minutes | Late-arriving aircraft |
| 3 June 2026 | 6 hours 14 minutes | Late-arriving aircraft |
| 25 January 2026 | 3 hours 59 minutes | Late-arriving aircraft |
| 27 November 2025 | 3 hours 58 minutes | Late-arriving aircraft |
Delay causes
Why UA 2305 runs late
National Airspace System accounts for 70% of the 12,000 delay minutes carriers reported here, and the remaining four split what is left.
- 70%National Airspace System
- 22%Late-arriving aircraft
- 7%Carrier
- 1%Extreme weather
70% 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 8,395 minutes out of 12,000, against a national NAS share of 21%. The split is drawn from 11,948 delay minutes reported on UA 2305.
Cancellations are rare at 0.28%, 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
14.7% 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.
UA 2305 is not only a SBA to SFO flight. It also flew SFO to IAH (328 flights, 80.8% 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. 362 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 | 328 | 80.8% | 58 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. 14.7% 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.