Flight number record

UA 1864

United Airlines · Miami to Newark

Route: MIA → EWR
Departs: 06:00
Flights: 360
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1864, check with United Airlines.

UA 1864 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 360 flights, with a median arrival 10 minutes early.

Set against the rest of the country, UA 1864's record is 15 points better than the US average of 77.6%. That gap is worth roughly 148 fewer late arrivals for every thousand flights.

On time

92.4%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

2.5%

National rate is 8.1%

These figures cover 360 flights between July 2025 and June 2026. The median arrival is 10 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 1864 flies

UA 1864 flies MIA to EWR without a single fixed slot. Its most common scheduled departure was 06:00, used on 59 of 360 flights, with 07:15 (56 flights) and 06:05 (47 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0059 flights16.4%
Departs 07:1556 flights15.6%
Departs 06:0547 flights13.1%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 1864 runs 3 points better at 92.4%. 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 1864 next to MIA to EWR

Every carrier on MIA to EWR combined arrived on time 71.8% of the time across 3,985 flights, so UA 1864 is 21 points ahead of it. United flew 2,253 flights on the same city pair under all its flight numbers, including this one, and those ran 74.9% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 13 points.

UA 1864 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1864thin sample	360	92.4%	87 min	0.83%	A+
All United Airlines on MIA–EWR	2,253	74.9%	88 min	2.04%	C
All carriers on MIA–EWR	3,985	71.8%	82 min	2.69%	C
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1864 quarter by quarter

Quarter by quarter UA 1864 held fairly steady: 89.8% in Jul–Sep 2025, 93.4% in Oct–Dec 2025, 90.8% in Jan–Mar 2026 and 95.6% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202589 flights89.8%
Oct–Dec 202591 flights93.4%
Jan–Mar 202689 flights90.8%
Apr–Jun 202691 flights95.6%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1864 did best on Wednesday at 98.0% on time and worst on Monday at 84.3%. Each day rests on about 51 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1864 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 2,353 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
46%
National Airspace System
25%
Carrier
24%
Extreme weather
5%

46% 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 2,353 reported delay minutes here, that single category outweighs weather by 10 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 2,353 delay minutes reported on UA 1864.

Cancellations are rare at 0.83%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.5% 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.

The 1,085 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on one other city pair in the data, including EWR to LAS (94), but none flew often enough under UA 1864 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MIA to EWR only.

One caution: this is a thin sample. 360 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 1864

For a booking, UA 1864 has one of the better records a US domestic flight can show: 92.4% on time and 0.83% cancelled. That is a base rate, not a promise about any single 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