Flight number record

UA 1379

United Airlines · Washington to Fort Lauderdale

Route: IAD → FLL
Departs: 17:42
Flights: 253
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1379, check with United Airlines.

UA 1379 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 253 flights, with a median arrival 8 minutes early.

On time

81.0%

Arrivals under 15 minutes late, of 252 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.40%

National rate is 1.81%

1 hour+ late

8.7%

National rate is 8.1%

These figures cover 253 flights between July 2025 and June 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When UA 1379 flies

UA 1379 flies IAD to FLL without a single fixed slot. Its most common scheduled departure was 17:42, used on 73 of 253 flights, with 17:55 (48 flights) and 19:45 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:4273 flights28.9%
Departs 17:5548 flights19.0%
Departs 19:4537 flights14.6%

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 17:42 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 1379 runs 13 points better at 81.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

UA 1379 next to IAD to FLL

Every carrier on IAD to FLL combined arrived on time 82.9% of the time across 760 flights, so UA 1379 is 2 points behind it. United flew 719 flights on the same city pair under all its flight numbers, including this one, and those ran 84.4% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 2 points.

UA 1379 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1379thin sample	253	81.0%	74 min	0.40%	B+
All United Airlines on IAD–FLL	719	84.4%	67 min	0.56%	B+
All carriers on IAD–FLL	760	82.9%	69 min	0.53%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1379 quarter by quarter

UA 1379 did not run the same all year. Its best quarter was Apr–Jun 2026 at 87.1% on time and its weakest Jan–Mar 2026 at 73.6%, a swing of 14 points on roughly 63 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 202591 flights78.9%
Oct–Dec 202539 flights84.6%
Jan–Mar 202653 flights73.6%
Apr–Jun 202670 flights87.1%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1379 did best on Monday at 91.4% on time and worst on Sunday at 75.0%. Each day rests on about 36 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1379 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 3,554 reported delay minutes.

Late-arriving aircraft
37%
National Airspace System
32%
Carrier
20%
Extreme weather
11%

Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 3,554 delay minutes reported on UA 1379.

Cancellations are rare at 0.40%, 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

8.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 901 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 eight other city pairs in the data, including DEN to IAD (53), LAS to IAD (49) and IAH to FLL (37), but none flew often enough under UA 1379 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to FLL only.

One caution: this is a thin sample. 253 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 1379

For a booking, read UA 1379 as 81.0% on time with 0.40% cancelled over 253 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