Flight profile · United Airlines
UA505
San Francisco (SFO) to Houston (IAH) · scheduled 11:59 PM – 5:47 AM
How UA505 performs
992 operations, 2023-07-01 to 2026-06-30.
UA505 arrived on time 83.6% of the time, against 84.5% for all SFO → IAH flights — this specific departure is 1.0 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 1.0 points worse.
Source: US DOT Bureau of Transportation Statistics · 992 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA505 | 83.6% | 0.60% | -7 min | 4.3% | 992 |
| United Airlines on SFO → IAH | 84.5% | 0.88% | -8 min | 4.3% | 10,033 |
| All SFO → IAH flights | 84.5% | 0.88% | -8 min | 4.3% | 10,033 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA505 run worse on particular days?
Monday is historically the most reliable day and Friday the least, a gap of 10.3 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA505 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 |
|---|---|---|---|
| PIT→SFO Pittsburgh to San Francisco | 2026-03-29 – 2026-04-27 | 14 | — |
| PHX→ORD Phoenix to Chicago | 2026-01-06 – 2026-02-11 | 37 | — |
| ORD→SFO Chicago to San Francisco | 2025-12-18 – 2026-01-05 | 19 | — |
| SAN→SFO San Diego to San Francisco | 2024-09-26 – 2025-12-17 | 361 | 69.3% |
| TYS→DEN Knoxville/Maryville to Denver | 2025-05-22 – 2025-06-25 | 35 | — |
| CVG→ORD Cincinnati / Covington to Chicago | 2023-09-29 – 2023-10-28 | 27 | — |
| AUS→DEN Austin to Denver | 2023-10-19 – 2023-10-19 | 1 | — |
| DEN→RNO Denver to Reno | 2023-09-05 – 2023-09-05 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA505 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 992 records of UA505 operating SFO → IAH, 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.