Flight number record

UA 347

United Airlines · Denver to Washington

Route: DEN → IAD
Departs: 13:53
Flights: 325
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 347, check with United Airlines.

UA 347 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 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 325 flights, with a median arrival 10 minutes early.

Set against the rest of the country, UA 347's record is 10 points better than the US average of 77.3%. That gap is worth roughly 97 fewer late arrivals for every thousand flights.

On time

87.0%

Arrivals under 15 minutes late, of 323 completed flights

Avg delay

89 min

Across delayed arrivals only, not all flights

Cancelled

0.62%

National rate is 1.89%

1 hour+ late

5.3%

National rate is 8.3%

These figures cover 325 flights between September 2025 and August 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.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Schedule

When UA 347 flies

UA 347 flies DEN to IAD without a single fixed slot. Its most common scheduled departure was 13:53, used on 82 of 325 flights, with 13:30 (72 flights) and 14:02 (37 flights) next.

Departs 13:5382 flights25.2%
Departs 13:3072 flights22.2%
Departs 14:0237 flights11.4%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 13:53 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 347 runs 9 points better at 87.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Against the route

UA 347 next to DEN to IAD

Every carrier on DEN to IAD combined arrived on time 81.8% of the time across 3,385 flights, so UA 347 is 5 points ahead of it. United flew 2,790 flights on the same city pair under all its flight numbers, including this one, and those ran 84.8% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 8 points.

UA 347 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 347thin sample	325	87.0%	89 min	0.62%	A+
All United Airlines on DEN–IAD	2,790	84.8%	66 min	0.50%	B+
All carriers on DEN–IAD	3,385	81.8%	60 min	0.59%	B+
United Airlines, whole network	830,825	78.8%	73 min	1.02%	B

Across the year

UA 347 quarter by quarter

UA 347 did not run the same all year. Its best quarter was Oct–Dec 2025 at 97.4% on time and its weakest Jul–Sep 2026 at 75.4%, a swing of 22 points on roughly 81 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 20256 flights—
Oct–Dec 202576 flights97.4%
Jan–Mar 202690 flights83.1%
Apr–Jun 202691 flights89.0%
Jul–Sep 202662 flights75.4%

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 347 did best on Wednesday at 95.6% on time and worst on Sunday at 73.9%. Each day rests on about 46 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late UA 347 runs when it is late

UA 347 often beats the schedule: 120 of 323 completed flights, 37%, arrived 15 minutes or more early. The 42 late arrivals split 8 under half an hour, 17 between 30 and 60 minutes, and 17 an hour or more.

15+ min early120 flights37.2%
Within 15 min161 flights49.8%
15–29 min late8 flights2.5%
30–59 min late17 flights5.3%
1–2 hours late8 flights2.5%
2+ hours late9 flights2.8%

Scale runs 0% to 100%.

Share of 323 completed flights by arrival against schedule.

12 of 43 late departures made up the time and arrived on time, 28% of them. 11 flights left on time and still arrived late.

The worst days

Worst days for UA 347

The latest arrival of the period was on 6 March 2026, 8 hours 50 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of UA 347 in the period
Date	Arrived late by	Largest filed cause
6 March 2026	8 hours 50 minutes	Carrier
17 February 2026	6 hours 26 minutes	Carrier
16 January 2026	5 hours 45 minutes	Late-arriving aircraft
16 April 2026	3 hours 28 minutes	Late-arriving aircraft
2 February 2026	2 hours 48 minutes	Late-arriving aircraft

Delay causes

Why UA 347 runs late

Late-arriving aircraft accounts for 59% of the 3,731 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
59%
Carrier
25%
National Airspace System
14%
Extreme weather
2%

59% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,731 reported delay minutes here, that single category outweighs weather by 33 to one. The split is drawn from 3,731 delay minutes reported on UA 347.

Cancellations are rare at 0.62%, below the national 1.89% 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

5.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

The 1,452 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.

UA 347 is not only a DEN to IAD flight. It also flew RNO to DEN (287 flights, 89.1% 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. 325 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 347
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
RNO to DENthin sample	287	89.1%	53 min	0.70%	A+

What to do with this

Booking UA 347

For a booking, UA 347 has one of the better records a US domestic flight can show: 87.0% on time and 0.62% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures