Flight number record
UA 2248
United Airlines · San Francisco to Newark
- Route
- SFO → EWR
- Departs
- 14:45
- Flights
- 351
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2248, check with United Airlines.
UA 2248 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 351 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so UA 2248 runs 11 points behind the country as a whole. Across a thousand flights that is about 112 extra late arrivals.
Key figures
On time
66.1%
Arrivals under 15 minutes late, of 342 completed flights
Avg delay
94 min
Across delayed arrivals only, not all flights
Cancelled
1.99%
National rate is 1.89%
1 hour+ late
18.7%
National rate is 8.3%
These figures cover 351 flights between September 2025 and August 2026. Beyond the headline rate, 18.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2248 flies
UA 2248 flies SFO to EWR without a single fixed slot. Its most common scheduled departure was 14:45, used on 143 of 351 flights, with 15:00 (100 flights) and 14:30 (53 flights) next.
- Departs 14:45143 flights40.7%
- Departs 15:00100 flights28.5%
- Departs 14:3053 flights15.1%
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 14:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 2248 runs 6 points worse at 66.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 2248 next to SFO to EWR
Every carrier on SFO to EWR combined arrived on time 76.8% of the time across 4,348 flights, so UA 2248 is 11 points behind it. United flew 3,861 flights on the same city pair under all its flight numbers, including this one, and those ran 75.2% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2248thin sample | 351 | 66.1% | 94 min | 1.99% | C |
| All United Airlines on SFO–EWR | 3,861 | 75.2% | 79 min | 2.07% | B |
| All carriers on SFO–EWR | 4,348 | 76.8% | 78 min | 1.95% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2248 quarter by quarter
UA 2248 did not run the same all year. Its best quarter was Apr–Jun 2026 at 79.1% on time and its weakest Oct–Dec 2025 at 57.8%, a swing of 21 points on roughly 88 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 flights—
- Oct–Dec 202591 flights57.8%
- Jan–Mar 202690 flights62.1%
- Apr–Jun 202687 flights79.1%
- Jul–Sep 202653 flights64.0%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2248 did best on Tuesday at 72.0% on time and worst on Sunday at 55.1%. Each day rests on about 50 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2248 runs when it is late
UA 2248 often beats the schedule: 104 of 342 completed flights, 30%, arrived 15 minutes or more early. When UA 2248 is late it tends to be very late: 64 of its 116 late arrivals were an hour or more behind, and 31 were two hours or more.
- 15+ min early104 flights30.4%
- Within 15 min122 flights35.7%
- 15–29 min late20 flights5.8%
- 30–59 min late32 flights9.4%
- 1–2 hours late33 flights9.6%
- 2+ hours late31 flights9.1%
Scale runs 0% to 100%.
Share of 342 completed flights by arrival against schedule.
41 of 146 late departures made up the time and arrived on time, 28% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for UA 2248
The latest arrival of the period was on 16 November 2025, 6 hours 42 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 November 2025 | 6 hours 42 minutes | Carrier |
| 20 July 2026 | 6 hours 24 minutes | Late-arriving aircraft |
| 12 March 2026 | 5 hours 58 minutes | Late-arriving aircraft |
| 22 October 2025 | 5 hours 56 minutes | Late-arriving aircraft |
| 5 November 2025 | 5 hours 32 minutes | Late-arriving aircraft |
Delay causes
Why UA 2248 runs late
Late-arriving aircraft accounts for 61% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Late-arriving aircraft
- 21%Carrier
- 19%National Airspace System
61% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 61 to one. The split is drawn from 10,929 delay minutes reported on UA 2248.
Cancellations sit at 1.99% against a national 1.89%, which is ordinary. Diversions add another 0.57%.
Connections and routes
What a delay on this flight costs
18.7% 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.
At 2,565 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on three other city pairs in the data, including TPA to SFO (45), ONT to SFO (29) and COS to DEN (1), but none flew often enough under UA 2248 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to EWR only.
One caution: this is a thin sample. 351 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 UA 2248
For a booking, UA 2248 is a flight to put a long connection behind. 18.7% 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
- SFO to EWR, every carrier and departure
- EWR to SFO, the return direction
- United Airlines 1149 on the same route89.9%
- United Airlines 2416 on the same route74.6%
- United Airlines 435 on the same route83.7%
- United Airlines 698 on the same route82.1%
- United Airlines 713 on the same route73.8%
- United Airlines 2626 on the same route65.5%
- San Francisco International (SFO) delay statistics
- Newark Liberty International (EWR) 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
- Why the first flight of the morning is statistically safest
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.