Flight number record

UA 2019

United Airlines · Los Angeles to San Francisco

Route: LAX → SFO
Departs: 16:10
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2019, check with United Airlines.

UA 2019 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 364 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so UA 2019 runs 7 points behind the country as a whole. Across a thousand flights that is about 73 extra late arrivals.

On time

70.3%

Arrivals under 15 minutes late, of 364 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

7.4%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.

Schedule

When UA 2019 flies

UA 2019 flies LAX to SFO without a single fixed slot. Its most common scheduled departure was 16:10, used on 112 of 364 flights, with 16:15 (92 flights) and 15:40 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:10112 flights30.8%
Departs 16:1592 flights25.3%
Departs 15:4053 flights14.6%

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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2019 runs 2 points worse at 70.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2019 next to LAX to SFO

Every carrier on LAX to SFO combined arrived on time 64.8% of the time across 11,013 flights, so UA 2019 is 6 points ahead of it. United flew 3,257 flights on the same city pair under all its flight numbers, including this one, and those ran 66.3% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 9 points.

UA 2019 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2019thin sample	364	70.3%	56 min	0.00%	C+
All United Airlines on LAX–SFO	3,257	66.3%	57 min	0.25%	C+
All carriers on LAX–SFO	11,013	64.8%	59 min	0.83%	D+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2019 quarter by quarter

UA 2019 did not run the same all year. Its best quarter was Jan–Mar 2026 at 80.9% on time and its weakest Apr–Jun 2026 at 49.5%, a swing of 31 points on roughly 91 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 flights78.3%
Oct–Dec 202592 flights72.8%
Jan–Mar 202689 flights80.9%
Apr–Jun 202691 flights49.5%

Scale runs 40% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2019 did best on Tuesday at 77.4% on time and worst on Thursday at 57.7%. Each day rests on about 52 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2019 runs late

One category carries most of the weight here. National Airspace System accounts for 54% of the 6,052 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.

National Airspace System
54%
Late-arriving aircraft
29%
Carrier
16%

54% 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 3,296 minutes out of 6,052, against a national NAS share of 21%. The split is drawn from 6,052 delay minutes reported on UA 2019.

Cancellations are rare at 0.00%, below the national 1.81% 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

7.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The same number turns up on seven other city pairs in the data, including SFO to SEA (215), SFO to DEN (41) and SEA to IAD (37), but none flew often enough under UA 2019 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to SFO only.

One caution: this is a thin sample. 364 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 2019

For a booking, read UA 2019 as 70.3% on time with 0.00% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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