Flight number record
UA 435
United Airlines · San Francisco to Newark
- Route
- SFO → EWR
- Departs
- 08:15
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 435, check with United Airlines.
UA 435 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 340 flights, with a median arrival 8 minutes early.
Set against the rest of the country, UA 435's record is 6 points better than the US average of 77.3%. That gap is worth roughly 64 fewer late arrivals for every thousand flights.
Key figures
On time
83.7%
Arrivals under 15 minutes late, of 326 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
2.35%
National rate is 1.89%
1 hour+ late
4.9%
National rate is 8.3%
These figures cover 340 flights between September 2025 and August 2026. The median arrival is 8 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 435 flies
UA 435 flies SFO to EWR without a single fixed slot. Its most common scheduled departure was 08:15, used on 103 of 340 flights, with 08:45 (74 flights) and 08:30 (66 flights) next.
- Departs 08:15103 flights30.3%
- Departs 08:4574 flights21.8%
- Departs 08:3066 flights19.4%
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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 435 runs level with that at 83.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 435 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 435 is 7 points ahead of 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 beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 435thin sample | 340 | 83.7% | 88 min | 2.35% | B |
| 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 435 quarter by quarter
UA 435 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.4% on time and its weakest Oct–Dec 2025 at 73.0%, a swing of 21 points on roughly 85 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 20256 flights—
- Oct–Dec 202592 flights73.0%
- Jan–Mar 202689 flights88.5%
- Apr–Jun 202691 flights94.4%
- Jul–Sep 202662 flights77.8%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 435 did best on Wednesday at 91.5% on time and worst on Saturday at 71.7%. Each day rests on about 49 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 435 runs when it is late
UA 435 often beats the schedule: 109 of 326 completed flights, 33%, arrived 15 minutes or more early. The 53 late arrivals split 19 under half an hour, 18 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early109 flights33.4%
- Within 15 min164 flights50.3%
- 15–29 min late19 flights5.8%
- 30–59 min late18 flights5.5%
- 1–2 hours late5 flights1.5%
- 2+ hours late11 flights3.4%
Scale runs 0% to 100%.
Share of 326 completed flights by arrival against schedule.
A late pushback is often recovered here: of 53 departures that left 15 minutes late or more, 20 still arrived on time. In the other direction, 20 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at EWR.
The worst days
Worst days for UA 435
The latest arrival of the period was on 18 December 2025, 13 hours 16 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 December 2025 | 13 hours 16 minutes | Late-arriving aircraft |
| 9 November 2025 | 8 hours 25 minutes | Late-arriving aircraft |
| 25 September 2025 | 4 hours 54 minutes | National Airspace System |
| 14 December 2025 | 4 hours 7 minutes | National Airspace System |
| 19 December 2025 | 3 hours 26 minutes | Late-arriving aircraft |
Delay causes
Why UA 435 runs late
Late-arriving aircraft accounts for 43% of the 4,687 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 35%National Airspace System
- 21%Carrier
- 1%Extreme weather
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,687 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 4,687 delay minutes reported on UA 435.
Cancellations sit at 2.35% against a national 1.89%, which is ordinary. Diversions add another 1.76%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.3% 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 2,565 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 five other city pairs in the data, including EWR to RSW (101), EWR to PDX (36) and SAN to SFO (15), but none flew often enough under UA 435 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. 340 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 435
For a booking, read UA 435 as 83.7% on time with 2.35% cancelled over 340 flights. Those are rates from the past twelve months, not a forecast for any particular day.
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 2248 on the same route66.1%
- 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.