Flight number record

UA 1777

United Airlines · Newark to San Francisco

Route: EWR → SFO
Departs: 08:30
Flights: 347
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. The late ones land a little over an hour behind schedule. That rests on 347 flights, with a median arrival 4 minutes early.

The national on-time rate over the same period is 77.6%, so UA 1777 runs 5 points behind the country as a whole. Across a thousand flights that is about 52 extra late arrivals.

On time

72.4%

Arrivals under 15 minutes late, of 337 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

2.88%

National rate is 1.81%

1 hour+ late

9.5%

National rate is 8.1%

These figures cover 347 flights between July 2025 and June 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When UA 1777 flies

UA 1777 flies EWR to SFO without a single fixed slot. Its most common scheduled departure was 08:30, used on 106 of 347 flights, with 08:45 (92 flights) and 08:50 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:30106 flights30.5%
Departs 08:4592 flights26.5%
Departs 08:5055 flights15.9%

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 08:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 1777 runs 12 points worse at 72.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 1777 next to EWR to SFO

Every carrier on EWR to SFO combined arrived on time 69.8% of the time across 4,403 flights, so UA 1777 is 3 points ahead of it. United flew 3,793 flights on the same city pair under all its flight numbers, including this one, and those ran 68.9% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 7 points.

UA 1777 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1777thin sample	347	72.4%	78 min	2.88%	C
All United Airlines on EWR–SFO	3,793	68.9%	92 min	2.53%	C
All carriers on EWR–SFO	4,403	69.8%	89 min	2.32%	C
United Airlines, whole network	821,041	79.0%	72 min	1.01%	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 86.1% on time and its weakest Oct–Dec 2025 at 58.4%, a swing of 28 points on roughly 87 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 202574 flights86.1%
Oct–Dec 202592 flights58.4%
Jan–Mar 202690 flights76.5%
Apr–Jun 202691 flights71.4%

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1777 did best on Wednesday at 80.0% on time and worst on Saturday at 65.3%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1777 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 42% of the 7,222 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.

Late-arriving aircraft
42%
Carrier
35%
National Airspace System
22%
Extreme weather
0%

42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 7,222 reported delay minutes here, that single category outweighs weather by 42 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 7,222 delay minutes reported on UA 1777.

Cancellations run at 2.88%, against 1.81% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 RDU to EWR (65), SFO to ORD (65) 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. 347 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, the cancellation rate is the figure to plan around on UA 1777: 2.88% of its 347 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

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