Flight profile · Delta Air Lines
DL1171
Detroit (DTW) to Boston (BOS) · scheduled 2:00 PM – 3:53 PM
How DL1171 performs
749 operations, 2024-06-07 to 2026-06-30.
DL1171 arrived on time 71.9% of the time, against 77.2% for all DTW → BOS flights — this specific departure is 5.3 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 6.0 points worse.
Source: US DOT Bureau of Transportation Statistics · 749 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1171 | 71.9% | 0.67% | -3 min | 10.8% | 749 |
| Delta Air Lines on DTW → BOS | 77.9% | 1.10% | -6 min | 8.3% | 5,110 |
| All DTW → BOS flights | 77.2% | 1.37% | -7 min | 9.2% | 8,044 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1171 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 |
|---|---|---|---|
| DTW→PWM Detroit to Portland | 2024-05-07 – 2024-06-05 | 30 | — |
| LGA→ATL New York to Atlanta | 2024-04-09 – 2024-05-06 | 24 | — |
| MCO→RDU Orlando to Raleigh–Durham | 2023-07-01 – 2024-04-08 | 220 | 74.8% |
| RDU→MCO Raleigh–Durham to Orlando | 2023-07-01 – 2024-04-08 | 195 | 77.3% |
| LAX→MSP Los Angeles to Minneapolis | 2024-01-08 – 2024-03-09 | 62 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1171 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 749 records of DL1171 operating DTW → BOS, 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.