Flight number record

UA 1366

United Airlines · Newark to Washington

Route: EWR → IAD
Departs: 06:00
Flights: 353
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1366, check with United Airlines.

UA 1366 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 19 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 353 flights, with a median arrival 10 minutes early.

Set against the rest of the country, UA 1366's record is 19 points better than the US average of 77.6%. That gap is worth roughly 186 fewer late arrivals for every thousand flights.

On time

96.2%

Arrivals under 15 minutes late, of 345 completed flights

Avg delay

94 min

Across delayed arrivals only, not all flights

Cancelled

2.27%

National rate is 1.81%

1 hour+ late

1.7%

National rate is 8.1%

These figures cover 353 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 1366 flies

UA 1366 is scheduled to leave Newark (EWR) at 06:00 local time and reach Washington (IAD) at 07:20. That slot held for 292 of the 353 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 06:00292 flights82.7%
Departs 06:1052 flights14.7%

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 1366 runs 7 points better at 96.2%. 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 1366 next to EWR to IAD

Every carrier on EWR to IAD combined arrived on time 73.9% of the time across 1,502 flights, so UA 1366 is 22 points ahead of it. United flew 1,474 flights on the same city pair under all its flight numbers, including this one, and those ran 73.9% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 17 points.

UA 1366 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1366thin sample	353	96.2%	94 min	2.27%	A
All United Airlines on EWR–IAD	1,474	73.9%	75 min	2.24%	C
All carriers on EWR–IAD	1,502	73.9%	75 min	2.33%	C
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1366 quarter by quarter

Quarter by quarter UA 1366 held fairly steady: 96.7% in Jul–Sep 2025, 94.4% in Oct–Dec 2025, 93.8% in Jan–Mar 2026 and 100.0% 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 202592 flights96.7%
Oct–Dec 202591 flights94.4%
Jan–Mar 202686 flights93.8%
Apr–Jun 202684 flights100.0%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1366 ranged from 92.2% on Thursday to 100.0% on Monday. With about 50 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 1366 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 1,223 reported delay minutes.

National Airspace System
37%
Extreme weather
28%
Carrier
22%
Late-arriving aircraft
13%

Extreme weather accounts for 28% 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 4.5 times the usual weather exposure. The split is drawn from 1,223 delay minutes reported on UA 1366.

Cancellations sit at 2.27% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 1.7% 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 same number turns up on five other city pairs in the data, including IAD to BNA (117), IAD to LAX (37) and BNA to IAH (33), but none flew often enough under UA 1366 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to IAD only.

One caution: this is a thin sample. 353 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 1366

For a booking, read UA 1366 as 96.2% on time with 2.27% cancelled over 353 flights. Those are rates from the past twelve months, not a forecast for any particular 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