Flight number record
UA 1827
United Airlines · San Diego to Newark
- Route
- SAN → EWR
- Departs
- 22:20
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1827, check with United Airlines.
UA 1827 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 364 flights, with a median arrival 13 minutes early.
Set against the rest of the country, UA 1827's record is 7 points better than the US average of 77.3%. That gap is worth roughly 72 fewer late arrivals for every thousand flights.
Key figures
On time
84.5%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
112 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 13 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.
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Schedule
When UA 1827 flies
UA 1827 flies SAN to EWR without a single fixed slot. Its most common scheduled departure was 22:20, used on 74 of 364 flights, with 14:24 (57 flights) and 22:30 (51 flights) next.
- Departs 22:2074 flights20.3%
- Departs 14:2457 flights15.7%
- Departs 22:3051 flights14.0%
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 22:20 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and UA 1827 runs 14 points better at 84.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 1827 next to SAN to EWR
Every carrier on SAN to EWR combined arrived on time 81.9% of the time across 1,557 flights, so UA 1827 is 3 points ahead of it. United flew 1,229 flights on the same city pair under all its flight numbers, including this one, and those ran 81.3% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1827thin sample | 364 | 84.5% | 112 min | 1.92% | B |
| All United Airlines on SAN–EWR | 1,229 | 81.3% | 92 min | 2.12% | B |
| All carriers on SAN–EWR | 1,557 | 81.9% | 90 min | 2.25% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1827 quarter by quarter
UA 1827 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.9% on time and its weakest Jul–Sep 2026 at 66.7%, a swing of 22 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 202530 flights—
- Oct–Dec 202592 flights87.8%
- Jan–Mar 202689 flights85.9%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights66.7%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1827 did best on Tuesday at 94.2% on time and worst on Friday at 76.9%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1827 runs when it is late
UA 1827 often beats the schedule: 168 of 354 completed flights, 47%, arrived 15 minutes or more early. The 55 late arrivals split 17 under half an hour, 11 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early168 flights47.5%
- Within 15 min131 flights37.0%
- 15–29 min late17 flights4.8%
- 30–59 min late11 flights3.1%
- 1–2 hours late14 flights4.0%
- 2+ hours late13 flights3.7%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
19 of 64 late departures made up the time and arrived on time, 30% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for UA 1827
The latest arrival of the period was on 14 August 2026, 11 hours 30 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 August 2026 | 11 hours 30 minutes | Extreme weather |
| 19 December 2025 | 11 hours 12 minutes | Extreme weather |
| 15 January 2026 | 11 hours 5 minutes | Carrier |
| 3 May 2026 | 8 hours 59 minutes | Extreme weather |
| 8 March 2026 | 7 hours 32 minutes | Late-arriving aircraft |
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 6,180 reported delay minutes.
- 33%Extreme weather
- 31%National Airspace System
- 20%Late-arriving aircraft
- 17%Carrier
Extreme weather accounts for 33% 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 5.5 times the usual weather exposure. The split is drawn from 6,180 delay minutes reported on UA 1827.
Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 0.82%.
Connections and routes
What a delay on this flight costs
7.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
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 84.5% on time with 1.92% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SAN to EWR, every carrier and departure
- EWR to SAN, the return direction
- United Airlines 427 on the same route81.6%
- United Airlines 327 on the same route78.8%
- San Diego International (SAN) 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
- The best time of day to fly, according to 7.05 million flight records
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.