Flight number record

UA 2248

United Airlines · San Francisco to Newark

Route: SFO → EWR
Departs: 14:45
Flights: 360
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 360 flights, with a median arrival right on schedule.

The national on-time rate over the same period is 77.6%, so UA 2248 runs 12 points behind the country as a whole. Across a thousand flights that is about 121 extra late arrivals.

On time

65.5%

Arrivals under 15 minutes late, of 351 completed flights

Avg delay

91 min

Across delayed arrivals only, not all flights

Cancelled

2.22%

National rate is 1.81%

1 hour+ late

19.1%

National rate is 8.1%

These figures cover 360 flights between July 2025 and June 2026. Beyond the headline rate, 19.1% 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 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 360 flights, with 14:55 (73 flights) and 14:30 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:45143 flights39.7%
Departs 14:5573 flights20.3%
Departs 14:3053 flights14.7%

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 14:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2248 runs 7 points worse at 65.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2248 next to SFO to EWR

Every carrier on SFO to EWR combined arrived on time 76.4% of the time across 4,401 flights, so UA 2248 is 11 points behind it. United flew 3,790 flights on the same city pair under all its flight numbers, including this one, and those ran 74.8% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 14 points.

UA 2248 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2248thin sample	360	65.5%	91 min	2.22%	C
All United Airlines on SFO–EWR	3,790	74.8%	82 min	2.24%	C
All carriers on SFO–EWR	4,401	76.4%	80 min	2.04%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	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 90 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 202592 flights63.6%
Oct–Dec 202591 flights57.8%
Jan–Mar 202690 flights62.1%
Apr–Jun 202687 flights79.1%

Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2248 did best on Tuesday at 72.5% on time and worst on Sunday at 51.0%. Each day rests on about 51 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2248 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 61% of the 11,000 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.

Late-arriving aircraft
61%
National Airspace System
21%
Carrier
18%

61% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 11,000 reported delay minutes here, that single category outweighs weather by 61 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 11,003 delay minutes reported on UA 2248.

Cancellations sit at 2.22% against a national 1.81%, which is ordinary. Diversions add another 0.28%.

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. 19.1% 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.

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. 360 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. 19.1% 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.

Where to go next

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.

Key figures