Flight number record

UA 1443

United Airlines · Washington to Charlotte Amalie

Route: IAD → STT
Departs: 08:15
Flights: 307
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1443, check with United Airlines.

UA 1443 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 307 flights, with a median arrival 11 minutes early.

Set against the rest of the country, UA 1443's record is 10 points better than the US average of 77.6%. That gap is worth roughly 102 fewer late arrivals for every thousand flights.

On time

87.8%

Arrivals under 15 minutes late, of 304 completed flights

Avg delay

47 min

Across delayed arrivals only, not all flights

Cancelled

0.98%

National rate is 1.81%

1 hour+ late

2.6%

National rate is 8.1%

These figures cover 307 flights between July 2025 and June 2026. The median arrival is 11 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 1443 flies

UA 1443 flies IAD to STT without a single fixed slot. Its most common scheduled departure was 08:15, used on 175 of 307 flights, with 08:59 (116 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:15175 flights57.0%
Departs 08:59116 flights37.8%

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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 1443 runs 4 points better at 87.8%. 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 1443 next to IAD to STT

Every carrier on IAD to STT combined arrived on time 88.7% of the time across 332 flights, so UA 1443 is about level with it. Across its whole network United Airlines managed 79.0%, which this flight beats by 9 points.

UA 1443 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1443thin sample	307	87.8%	47 min	0.98%	A+
All United Airlines on IAD–STTthin sample	332	88.7%	47 min	1.20%	A
All carriers on IAD–STTthin sample	332	88.7%	47 min	1.20%	A
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1443 quarter by quarter

UA 1443 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.8% on time and its weakest Jul–Sep 2025 at 81.5%, a swing of 16 points on roughly 77 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 202555 flights81.5%
Oct–Dec 202571 flights81.7%
Jan–Mar 202690 flights86.4%
Apr–Jun 202691 flights97.8%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1443 ranged from 82.9% on Sunday to 90.7% on Monday. With about 44 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 1443 runs late

One category carries most of the weight here. National Airspace System accounts for 61% of the 1,731 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.

National Airspace System
61%
Carrier
28%
Late-arriving aircraft
10%
Extreme weather
2%

61% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,053 minutes out of 1,731, against a national NAS share of 21%. The split is drawn from 1,731 delay minutes reported on UA 1443.

Cancellations sit at 0.98% 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 2.6% 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.

At 1,606 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.

Every one of the 307 flights under UA 1443 in the data flew IAD to STT. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 307 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 1443

For a booking, UA 1443 has one of the better records a US domestic flight can show: 87.8% on time and 0.98% 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