Flight profile · United Airlines
UA347
Denver (DEN) to Washington (IAD) · scheduled 1:30 PM – 7:21 PM
How UA347 performs
685 operations, May 2024 – July 2026.
UA347 arrived on time 82.6% of the time, against 78.7% for all DEN → IAD flights, so this departure is 3.9 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 1.0 points better.
Source: US DOT Bureau of Transportation Statistics · 685 operations, May 2024 – July 2026 · If UA347 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA347 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA347 | 82.6% | 0.58% | -8 min | 6.6% | 685 |
| United Airlines on DEN → IAD | 81.6% | 1.13% | -8 min | 6.7% | 7,845 |
| All DEN → IAD flights | 78.7% | 0.97% | -5 min | 6.9% | 10,253 |
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026
Why UA347 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA347 on DEN → IAD. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA347 comes in late, and what that does to the departure.
The aircraft flying UA347 came in 15 or more minutes late on 9% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into DEN just before it, using the tail number in the DOT file, 641 of 682 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| UA347 | 9% |
| Network, same turn | 17% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often UA347’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026
From pushback to gate
When it leaves DEN late, does that still matter by the time it reaches IAD?
UA347 pushes back an average of 11.6 minutes late and reaches the gate at IAD an average of 3.6 minutes late. The 8.0 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 20.3 minutes on the taxiways at DEN, 1.9 minutes longer than a typical DEN departure in the same hour.
On arrival at IAD, UA347 spends 8.0 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at IAD spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached IAD. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 83,741 departures from DEN scheduled in the clock hour UA347 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at IAD (169,930 flights), not just UA347’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026
The hour it leaves DEN
Part of any flight’s record belongs to the clock rather than to the flight. UA347 has one departure time, so this is what that time is worth.
On-time arrival rate. 83,741 departures from DEN are scheduled in the 1 PM–2 PM hour over the period, against 963,099 across the whole day.
UA347 is scheduled out of DEN at 1:30 PM, in the 1 PM–2 PM bank. Departures from DEN in that hour arrive on time 79.4% of the time against 76.0% across the airport’s whole day — the slot alone is worth 3.4 points better before anything about this particular flight is considered.
The two airport figures cover every departure from DEN to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes UA347 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| RNO→DEN Reno to Denver | October 26, 2025 – July 31, 2026 | 256 | 90.2% |
| RAP→DEN Rapid City to Denver | August 19, 2025 – October 25, 2025 | 67 | — |
| SEA→DEN Seattle to Denver | August 1–18, 2025 | 18 | — |
| SAN→DEN San Diego to Denver | June 26, 2025 – July 31, 2025 | 36 | — |
| SFO→DEN San Francisco to Denver | May 22–31, 2025 | 10 | — |
| IAD→ATL Washington to Atlanta | March 30, 2025 – April 30, 2025 | 18 | — |
| SNA→DEN Santa Ana to Denver | February 13, 2025 – March 29, 2025 | 45 | — |
| PHL→DEN Philadelphia to Denver | December 21, 2023 – January 6, 2025 | 244 | 90.9% |
| CHS→ORD Charleston to Chicago | May 2, 2024 | 1 | — |
| CLE→EWR Cleveland to Newark | March 31, 2024 | 1 | — |
| DEN→IAH Denver to Houston | October 29, 2023 – March 30, 2024 | 154 | 79.5% |
| PHX→DEN Phoenix to Denver | November 28–29, 2023 | 2 | — |
| LAS→DEN Las Vegas to Denver | October 29, 2023 – November 27, 2023 | 20 | — |
| ORD→CLE Chicago to Cleveland | September 29, 2023 – October 27, 2023 | 25 | — |
| ORD→BNA Chicago to Nashville | September 30, 2023 | 1 | — |
| CLE→IAH Cleveland to Houston | July 1, 2023 – September 28, 2023 | 80 | — |
| IAH→SAT Houston to San Antonio | August 20, 2023 – September 3, 2023 | 3 | — |
| EWR→MYR Newark to Myrtle Beach | July 30, 2023 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA347 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
37 min late
against a median of 8 min early
Percentiles over 685 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1101 | United Airlines | 91.0% | 11 min early | 911 |
| UA347 this flight | United Airlines | 82.6% | 8 min early | 685 |
| UA2087 | United Airlines | 79.8% | 4 min early | 991 |
| UA798 | United Airlines | 79.1% | 6 min early | 946 |
| UA2408 | United Airlines | 69.0% | 0 min early | 952 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA347 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 685 records of UA347 operating DEN → IAD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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