Flight number record

UA 2366

United Airlines · Houston to Washington

Route: IAH → IAD
Departs: 12:10
Flights: 316
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2366, check with United Airlines.

UA 2366 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That is a workable record, not a spotless one. That rests on 316 flights, with a median arrival right on schedule.

Set against the rest of the country, UA 2366's record is 5 points better than the US average of 77.6%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.

On time

82.2%

Arrivals under 15 minutes late, of 315 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.32%

National rate is 1.81%

1 hour+ late

3.8%

National rate is 8.1%

These figures cover 316 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.

Schedule

When UA 2366 flies

UA 2366 flies IAH to IAD without a single fixed slot. Its most common scheduled departure was 12:10, used on 68 of 316 flights, with 12:15 (55 flights) and 12:13 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:1068 flights21.5%
Departs 12:1555 flights17.4%
Departs 12:1342 flights13.3%

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 12:10 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 2366 runs 3 points better at 82.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2366 next to IAH to IAD

Every carrier on IAH to IAD combined arrived on time 80.4% of the time across 1,867 flights, so UA 2366 is 2 points ahead of it. Across its whole network United Airlines managed 79.0%, which this flight beats by 3 points.

UA 2366 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2366thin sample	316	82.2%	45 min	0.32%	B+
All United Airlines on IAH–IAD	1,867	80.4%	59 min	0.43%	B+
All carriers on IAH–IAD	1,867	80.4%	59 min	0.43%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2366 quarter by quarter

Quarter by quarter UA 2366 held fairly steady: 86.0% in Jul–Sep 2025, 85.9% in Oct–Dec 2025, 78.7% in Jan–Mar 2026 and 80.2% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202543 flights86.0%
Oct–Dec 202592 flights85.9%
Jan–Mar 202690 flights78.7%
Apr–Jun 202691 flights80.2%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2366 did best on Tuesday at 91.3% on time and worst on Friday at 73.3%. Each day rests on about 45 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2366 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 2,518 reported delay minutes.

Carrier
34%
National Airspace System
29%
Late-arriving aircraft
24%
Extreme weather
14%

Extreme weather accounts for 14% 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 2.2 times the usual weather exposure. The split is drawn from 2,518 delay minutes reported on UA 2366.

Cancellations are rare at 0.32%, 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 3.8% 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 1,190 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.

UA 2366 is not only a IAH to IAD flight. It also flew SLC to IAH (263 flights, 93.8% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 316 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.

Other routes flown as UA 2366
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SLC to IAHthin sample	263	93.8%	86 min	1.90%	A

What to do with this

Booking UA 2366

For a booking, read UA 2366 as 82.2% on time with 0.32% cancelled over 316 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