Flight number record
UA 1777
United Airlines · Newark to San Francisco
- Route
- EWR → SFO
- Departs
- 08:45
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1777, check with United Airlines.
UA 1777 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 365 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so UA 1777 runs 5 points behind the country as a whole. Across a thousand flights that is about 48 extra late arrivals.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
2.47%
National rate is 1.89%
1 hour+ late
9.0%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1777 flies
UA 1777 flies EWR to SFO without a single fixed slot. Its most common scheduled departure was 08:45, used on 92 of 365 flights, with 08:15 (66 flights) and 08:30 (65 flights) next.
- Departs 08:4592 flights25.2%
- Departs 08:1566 flights18.1%
- Departs 08:3065 flights17.8%
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 08:45 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 1777 runs 11 points worse at 72.5%. 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 1777 next to EWR to SFO
Every carrier on EWR to SFO combined arrived on time 67.9% of the time across 4,349 flights, so UA 1777 is 5 points ahead of it. United flew 3,863 flights on the same city pair under all its flight numbers, including this one, and those ran 66.7% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1777 | 365 | 72.5% | 75 min | 2.47% | C |
| All United Airlines on EWR–SFO | 3,863 | 66.7% | 90 min | 2.43% | C |
| All carriers on EWR–SFO | 4,349 | 67.9% | 88 min | 2.30% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1777 quarter by quarter
UA 1777 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Oct–Dec 2025 at 58.4%, a swing of 32 points on roughly 73 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 flights90.0%
- Oct–Dec 202592 flights58.4%
- Jan–Mar 202690 flights76.5%
- Apr–Jun 202691 flights71.4%
- Jul–Sep 202662 flights80.3%
Scale runs 50% to 95%.
By weekday, UA 1777 did best on Wednesday at 80.4% on time and worst on Saturday at 65.4%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1777 runs when it is late
UA 1777 often beats the schedule: 91 of 356 completed flights, 26%, arrived 15 minutes or more early. The 98 late arrivals split 33 under half an hour, 33 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early91 flights25.6%
- Within 15 min167 flights46.9%
- 15–29 min late33 flights9.3%
- 30–59 min late33 flights9.3%
- 1–2 hours late18 flights5.1%
- 2+ hours late14 flights3.9%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
18 of 76 late departures made up the time and arrived on time, 24% of them. In the other direction, 40 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 SFO.
The worst days
Worst days for UA 1777
The latest arrival of the period was on 26 March 2026, 9 hours 49 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 March 2026 | 9 hours 49 minutes | Late-arriving aircraft |
| 12 January 2026 | 8 hours 37 minutes | Carrier |
| 2 February 2026 | 7 hours 32 minutes | Late-arriving aircraft |
| 22 April 2026 | 6 hours 45 minutes | Late-arriving aircraft |
| 23 May 2026 | 4 hours 52 minutes | Late-arriving aircraft |
Delay causes
Why UA 1777 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 7,392 reported delay minutes.
- 38%Carrier
- 37%Late-arriving aircraft
- 24%National Airspace System
- 0%Extreme weather
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,392 reported delay minutes here, that single category outweighs weather by 37 to one. The split is drawn from 7,392 delay minutes reported on UA 1777.
Cancellations sit at 2.47% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 four other city pairs in the data, including SFO to ORD (106), RDU to EWR (34) and ORF to EWR (25), but none flew often enough under UA 1777 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to SFO only.
One caution: this is a thin sample. 365 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 1777
For a booking, read UA 1777 as 72.5% on time with 2.47% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- EWR to SFO, every carrier and departure
- SFO to EWR, the return direction
- United Airlines 648 on the same route70.9%
- United Airlines 2328 on the same route65.4%
- United Airlines 1343 on the same route64.1%
- United Airlines 2115 on the same route83.2%
- United Airlines 1227 on the same route69.3%
- United Airlines 1960 on the same route70.8%
- Newark Liberty International (EWR) delay statistics
- San Francisco International (SFO) 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.