Flight number record

UA 379

United Airlines · Washington to Orlando

Route: IAD → MCO
Departs: 08:15
Flights: 328
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 379, check with United Airlines.

UA 379 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 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 328 flights, with a median arrival 11 minutes early.

Set against the rest of the country, UA 379's record is 12 points better than the US average of 77.6%. That gap is worth roughly 118 fewer late arrivals for every thousand flights.

On time

89.4%

Arrivals under 15 minutes late, of 322 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

1.22%

National rate is 1.81%

1 hour+ late

3.4%

National rate is 8.1%

These figures cover 328 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 379 flies

UA 379 flies IAD to MCO without a single fixed slot. Its most common scheduled departure was 08:15, used on 92 of 328 flights, with 08:30 (80 flights) and 08:25 (56 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:1592 flights28.0%
Departs 08:3080 flights24.4%
Departs 08:2556 flights17.1%

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 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 379 runs 5 points better at 89.4%. 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 379 next to IAD to MCO

Every carrier on IAD to MCO combined arrived on time 81.7% of the time across 2,176 flights, so UA 379 is 8 points ahead of it. United flew 1,897 flights on the same city pair under all its flight numbers, including this one, and those ran 83.0% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 10 points.

UA 379 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 379thin sample	328	89.4%	60 min	1.22%	A
All United Airlines on IAD–MCO	1,897	83.0%	70 min	0.58%	B+
All carriers on IAD–MCO	2,176	81.7%	71 min	0.87%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 379 quarter by quarter

Quarter by quarter UA 379 held fairly steady: 87.6% in Jul–Sep 2025, 86.8% in Oct–Dec 2025, 87.3% in Jan–Mar 2026 and 96.2% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights87.6%
Oct–Dec 202592 flights86.8%
Jan–Mar 202665 flights87.3%
Apr–Jun 202679 flights96.2%

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

By weekday, UA 379 ranged from 84.0% on Monday to 94.6% on Wednesday. With about 47 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 379 runs late

One category carries most of the weight here. Carrier accounts for 54% of the 2,054 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.

Carrier
54%
National Airspace System
32%
Late-arriving aircraft
12%
Extreme weather
2%

The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,113 of the 2,054 delay minutes reported here. The split is drawn from 2,054 delay minutes reported on UA 379.

Cancellations sit at 1.22% against a national 1.81%, which is ordinary. Diversions add another 0.61%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.4% 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 758 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 seven other city pairs in the data, including CVG to IAD (17), ORD to PDX (6) and IAD to CHS (4), but none flew often enough under UA 379 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to MCO only.

One caution: this is a thin sample. 328 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 379

For a booking, UA 379 has one of the better records a US domestic flight can show: 89.4% on time and 1.22% 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