Flight profile · Delta Air Lines
DL1251
Atlanta (ATL) to Tucson (TUS) · scheduled 8:55 PM – 9:46 PM
How DL1251 performs
974 operations, 2023-09-05 to 2026-06-30.
DL1251 arrived on time 78.8% of the time, against 83.3% for all ATL → TUS flights — this specific departure is 4.5 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.5 points worse.
Source: US DOT Bureau of Transportation Statistics · 974 operations between 2023-09-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1251 | 78.8% | 1.33% | -4 min | 5.6% | 974 |
| Delta Air Lines on ATL → TUS | 83.3% | 1.25% | -5 min | 4.4% | 2,401 |
| All ATL → TUS flights | 83.3% | 1.25% | -5 min | 4.4% | 2,401 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30
By day of week
Does DL1251 run worse on particular days?
Saturday is historically the most reliable day and Friday the least, a gap of 13.1 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes DL1251 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 |
|---|---|---|---|
| GSP→ATL Greenville/Greer/Spartanburg to Atlanta | 2024-12-20 – 2026-01-04 | 33 | — |
| ATL→GSP Atlanta to Greenville/Greer/Spartanburg | 2024-12-19 – 2026-01-04 | 30 | — |
| ORF→ATL Norfolk to Atlanta | 2023-07-01 – 2023-09-04 | 66 | — |
| ATL→ORF Atlanta to Norfolk | 2023-07-09 – 2023-09-04 | 44 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1251 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 974 records of DL1251 operating ATL → TUS, 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.