Flight profile · United Airlines
UA652
Denver (DEN) to St. Louis (STL) · scheduled 9:40 AM – 12:43 PM
How UA652 performs
906 operations, January 2024 – July 2026.
UA652 arrived on time 84.7% of the time, against 76.4% for all DEN → STL flights, so this departure is 8.3 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 6.2 points better.
Source: US DOT Bureau of Transportation Statistics · 906 operations, January 2024 – July 2026 · If UA652 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA652 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 |
|---|---|---|---|---|---|
| UA652 | 84.7% | 0.77% | -8 min | 3.7% | 906 |
| United Airlines on DEN → STL | 78.5% | 0.68% | -5 min | 8.2% | 3,529 |
| All DEN → STL flights | 76.4% | 0.69% | -4 min | 7.7% | 11,921 |
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026
Why UA652 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
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 UA652 on DEN → STL. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA652 comes in late, and what that does to the departure.
The aircraft flying UA652 came in 15 or more minutes late on 11% 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, 655 of 900 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 |
|---|---|
| UA652 | 11% |
| 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 UA652’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 January 2024 – July 2026
From pushback to gate
When it leaves DEN late, does that still matter by the time it reaches STL?
UA652 pushes back an average of 5.1 minutes late and reaches the gate at STL an average of 0.1 minutes early. The 5.2 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 18.7 minutes on the taxiways at DEN, 1.7 minutes shorter than a typical DEN departure in the same hour.
On arrival at STL, UA652 spends 5.3 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 STL 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 STL. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 70,565 departures from DEN scheduled in the clock hour UA652 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at STL (198,659 flights), not just UA652’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026
The hour it leaves DEN
Part of any flight’s record belongs to the clock rather than to the flight. UA652 has one departure time, so this is what that time is worth.
On-time arrival rate. 70,565 departures from DEN are scheduled in the 9 AM–10 AM hour over the period, against 963,099 across the whole day.
UA652 is scheduled out of DEN at 9:40 AM, in the 9 AM–10 AM bank. Departures from DEN in that hour arrive on time 82.6% of the time against 76.0% across the airport’s whole day — the slot alone is worth 6.6 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 · January 2024 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does UA652 run worse on particular days?
Tuesday is historically the most reliable day and Saturday the least, a gap of 12.4 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes UA652 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 |
|---|---|---|---|
| DEN→SAV Denver to Savannah | April 30, 2026 – May 20, 2026 | 21 | — |
| IAH→DCA Houston to Washington | March 8–29, 2025 | 4 | — |
| DEN→ABQ Denver to Albuquerque | February 15, 2025 – March 1, 2025 | 3 | — |
| ONT→DEN Ontario to Denver | October 27, 2024 – December 2, 2024 | 37 | — |
| RAP→DEN Rapid City to Denver | May 3–4, 2024 | 2 | — |
| ORD→GRR Chicago to Grand Rapids | December 21, 2023 – January 8, 2024 | 19 | — |
| SEA→ORD Seattle to Chicago | January 1–8, 2024 | 8 | — |
| CLE→EWR Cleveland to Newark | November 28, 2023 – December 20, 2023 | 23 | — |
| EWR→MIA Newark to Miami | December 2–20, 2023 | 10 | — |
| ATL→IAH Atlanta to Houston | July 1, 2023 – November 27, 2023 | 141 | 76.6% |
| IAH→RDU Houston to Raleigh–Durham | November 1–27, 2023 | 16 | — |
| SFO→ABQ San Francisco to Albuquerque | October 15, 2023 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA652 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.
25 min late
against a median of 8 min early
Percentiles over 906 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering January 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 |
|---|---|---|---|---|
| UA1315 | United Airlines | 85.4% | 8 min early | 866 |
| UA652 this flight | United Airlines | 84.7% | 8 min early | 906 |
| F93302 | Frontier Airlines | 83.8% | 11 min early | 603 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA652 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 906 records of UA652 operating DEN → STL, 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
Analysis last recomputed