Flight profile · United Airlines
UA1380
St. Louis (STL) to Denver (DEN) · scheduled 1:38 PM – 3:00 PM
How UA1380 performs
130 operations, December 2025 – July 2026.
UA1380 arrived on time 84.5% of the time, against 77.0% for all STL → DEN flights — this specific departure is 7.5 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 6.9 points better.
Source: US DOT Bureau of Transportation Statistics · 130 operations, December 2025 – July 2026 · If UA1380 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back — the refund checker walks through eligibility.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA1380 | 84.5% | 0.77% | -8 min | 3.1% | 130 |
| United Airlines on STL → DEN | 77.6% | 0.91% | -4 min | 9.1% | 3,528 |
| All STL → DEN flights | 77.0% | 0.75% | -4 min | 8.3% | 11,911 |
Source: FlyerIntel analysis of US DOT BTS data · December 2025 – July 2026
Why UA1380 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fueling — within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA1380 on STL → DEN. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2025 – July 2026
From pushback to gate
When it leaves STL late, does that still matter by the time it reaches DEN?
UA1380 pushes back an average of 6.7 minutes late and reaches the gate at DEN an average of 0.0 minutes early. The 6.7 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 15.8 minutes on the taxiways at STL, 3.6 minutes longer than a typical STL departure in the same hour.
On arrival at DEN, UA1380 spends 9.0 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 DEN 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 DEN. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 10,779 departures from STL scheduled in the clock hour UA1380 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DEN (963,027 flights), not just UA1380’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · December 2025 – July 2026
The hour it leaves STL
Part of any flight’s record belongs to the clock rather than to the flight. UA1380 has one departure time, so this is what that time is worth.
On-time arrival rate. 10,779 departures from STL are scheduled in the 1 PM–2 PM hour over the period, against 198,650 across the whole day.
UA1380 is scheduled out of STL at 1:38 PM, in the 1 PM–2 PM bank. Departures from STL in that hour arrive on time 77.7% of the time against 79.1% across the airport’s whole day, so the hour UA1380 leaves in is an ordinary one for STL and explains nothing about its record either way.
The two airport figures cover every departure from STL 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 · December 2025 – July 2026 · Hours below 120 departures are not scored.
Other routes UA1380 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 |
|---|---|---|---|
| IAH→EWR Houston to Newark | April 30, 2026 – May 20, 2026 | 21 | — |
| IAH→PHX Houston to Phoenix | March 5–28, 2026 | 24 | — |
| IAH→MIA Houston to Miami | January 8, 2026 – February 9, 2026 | 25 | — |
| DEN→EWR Denver to Newark | December 17, 2025 | 1 | — |
| DEN→SJC Denver to San Jose | August 20, 2025 – December 16, 2025 | 88 | — |
| DFW→DEN Dallas–Fort Worth to Denver | July 1, 2023 – August 18, 2025 | 738 | 83.4% |
| COS→DEN Colorado Springs to Denver | March 4, 2024 | 1 | — |
| MCO→IAH Orlando to Houston | January 9, 2024 – February 14, 2024 | 37 | — |
| EWR→DEN Newark to Denver | December 17, 2023 | 1 | — |
| EWR→DFW Newark to Dallas–Fort Worth | November 30, 2023 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1380 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.
23 min late
against a median of 8 min early
Percentiles over 130 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2025 – July 2026
Other flights on this route
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1380 this flight | United Airlines | 84.5% | 8 min early | 130 |
| UA2625 | United Airlines | 82.9% | 9 min early | 851 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA1380 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 130 records of UA1380 operating STL → DEN, 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
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