Flight profile · United Airlines
UA611
San Francisco (SFO) to Las Vegas (LAS) · scheduled 11:00 AM – 12:48 PM
How UA611 performs
754 operations, March 2024 – July 2026.
UA611 arrived on time 78.9% of the time, against 73.3% for all SFO → LAS flights, so this departure is 5.6 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 1.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 754 operations, March 2024 – July 2026 · If UA611 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA611 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 |
|---|---|---|---|---|---|
| UA611 | 78.9% | 0.53% | -3 min | 5.6% | 754 |
| United Airlines on SFO → LAS | 80.7% | 0.92% | -6 min | 6.4% | 7,598 |
| All SFO → LAS flights | 73.3% | 1.01% | -3 min | 9.6% | 18,263 |
Source: FlyerIntel analysis of US DOT BTS data · March 2024 – July 2026
Why UA611 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all 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 UA611 on SFO → LAS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering March 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA611 comes in late, and what that does to the departure.
The aircraft flying UA611 came in 15 or more minutes late on 17% 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 SFO just before it, using the tail number in the DOT file, 610 of 750 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 |
|---|---|
| UA611 | 17% |
| 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 UA611’s aircraft landed 15 or more minutes late is about the same as 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 March 2024 – July 2026
From pushback to gate
When it leaves SFO late, does that still matter by the time it reaches LAS?
On arrival at LAS, UA611 spends 10.1 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 2.4 minutes longer than a typical LAS arrival (7.7 min).
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 LAS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 27,617 departures from SFO scheduled in the clock hour UA611 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at LAS (569,643 flights), not just UA611’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · March 2024 – July 2026
The hour it leaves SFO
Part of any flight’s record belongs to the clock rather than to the flight. UA611 has one departure time, so this is what that time is worth.
On-time arrival rate. 27,617 departures from SFO are scheduled in the 11 AM–12 PM hour over the period, against 435,779 across the whole day.
UA611 is scheduled out of SFO at 11:00 AM, in the 11 AM–12 PM bank. Departures from SFO in that hour arrive on time 74.3% of the time against 78.7% across the airport’s whole day — the slot alone is worth 4.4 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from SFO 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 · March 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes UA611 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 |
|---|---|---|---|
| TPA→SFO Tampa to San Francisco | June 25, 2026 – July 31, 2026 | 37 | — |
| DTW→SFO Detroit to San Francisco | March 29, 2026 – May 20, 2026 | 53 | — |
| SFO→ORD San Francisco to Chicago | April 30, 2026 | 1 | — |
| SEA→SFO Seattle to San Francisco | July 1, 2023 – March 4, 2026 | 52 | — |
| LAS→DEN Las Vegas to Denver | February 12, 2026 – March 4, 2026 | 21 | — |
| ORD→SFO Chicago to San Francisco | June 26, 2025 – January 5, 2026 | 72 | — |
| BNA→SFO Nashville to San Francisco | May 22, 2025 – October 25, 2025 | 103 | 92.2% |
| IAH→SFO Houston to San Francisco | September 29, 2023 – May 21, 2025 | 408 | 86.3% |
| SFO→EWR San Francisco to Newark | December 19, 2024 – January 6, 2025 | 19 | — |
| SFO→EUG San Francisco to Eugene | December 21, 2023 – February 14, 2024 | 53 | — |
| EWR→PHX Newark to Phoenix | November 28, 2023 – December 20, 2023 | 23 | — |
| SFO→SBA San Francisco to Santa Barbara | July 1, 2023 – November 27, 2023 | 150 | 83.3% |
Because the same number has served different journeys, the statistics above describe only the route UA611 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.
35 min late
against a median of 3 min early
Percentiles over 754 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering March 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 |
|---|---|---|---|---|
| UA1995 | United Airlines | 83.1% | 8 min early | 781 |
| UA611 this flight | United Airlines | 78.9% | 3 min early | 754 |
| F94158 | Frontier Airlines | 64.3% | 3 min early | 654 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA611 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 754 records of UA611 operating SFO → LAS, 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