Flight number record

UA 1827

United Airlines · San Diego to Newark

Route: SAN → EWR
Departs: 22:30
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1827, check with United Airlines.

UA 1827 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 364 flights, with a median arrival 16 minutes early.

Set against the rest of the country, UA 1827's record is 12 points better than the US average of 77.6%. That gap is worth roughly 119 fewer late arrivals for every thousand flights.

On time

89.5%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

115 min

Across delayed arrivals only, not all flights

Cancelled

2.47%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 16 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When UA 1827 flies

UA 1827 flies SAN to EWR without a single fixed slot. Its most common scheduled departure was 22:30, used on 113 of 364 flights, with 22:20 (53 flights) and 22:40 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:30113 flights31.0%
Departs 22:2053 flights14.6%
Departs 22:4040 flights11.0%

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 22:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and UA 1827 runs 19 points better at 89.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

UA 1827 next to SAN to EWR

Every carrier on SAN to EWR combined arrived on time 82.9% of the time across 1,561 flights, so UA 1827 is 7 points ahead of it. United flew 1,233 flights on the same city pair under all its flight numbers, including this one, and those ran 82.9% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 11 points.

UA 1827 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1827thin sample	364	89.5%	115 min	2.47%	A
All United Airlines on SAN–EWR	1,233	82.9%	82 min	1.87%	B
All carriers on SAN–EWR	1,561	82.9%	83 min	2.24%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1827 quarter by quarter

Quarter by quarter UA 1827 held fairly steady: 95.5% in Jul–Sep 2025, 87.8% in Oct–Dec 2025, 85.9% in Jan–Mar 2026 and 88.9% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights95.5%
Oct–Dec 202592 flights87.8%
Jan–Mar 202689 flights85.9%
Apr–Jun 202691 flights88.9%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1827 did best on Tuesday at 96.2% on time and worst on Thursday at 82.7%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1827 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 4,268 reported delay minutes.

Extreme weather
32%
National Airspace System
25%
Carrier
23%
Late-arriving aircraft
20%

Extreme weather accounts for 32% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 5.2 times the usual weather exposure. The split is drawn from 4,268 delay minutes reported on UA 1827.

Cancellations sit at 2.47% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 2,425 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.

Every one of the 364 flights under UA 1827 in the data flew SAN to EWR. The number was not reused on any other city pair, which makes this a clean record of one route.

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 1827

For a booking, read UA 1827 as 89.5% on time with 2.47% 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