Flight profile · Delta Air Lines
DL1633
Detroit (DTW) to Houston (IAH) · scheduled 8:15 PM – 10:59 PM
How DL1633 performs
839 operations, 2023-07-01 to 2026-06-30.
DL1633 arrived on time 73.6% of the time, against 79.0% for all DTW → IAH flights — this specific departure is 5.4 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 839 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1633 | 73.6% | 1.91% | -4 min | 9.6% | 839 |
| Delta Air Lines on DTW → IAH | 77.9% | 0.94% | -6 min | 7.4% | 3,929 |
| All DTW → IAH flights | 79.0% | 1.18% | -7 min | 7.1% | 6,865 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
Other routes DL1633 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 |
|---|---|---|---|
| ATL→GRR Atlanta to Grand Rapids | 2024-05-11 – 2024-06-01 | 5 | — |
| GRR→ATL Grand Rapids to Atlanta | 2024-05-11 – 2024-06-01 | 5 | — |
| PHL→SLC Philadelphia to Salt Lake City | 2024-01-08 – 2024-03-09 | 62 | — |
| ATL→MDT Atlanta to Harrisburg | 2023-11-24 – 2023-11-24 | 1 | — |
| ATL→XNA Atlanta to Fayetteville/Springdale/Rogers | 2023-10-09 – 2023-11-04 | 27 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1633 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 839 records of DL1633 operating DTW → 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.