Flight profile · Delta Air Lines
DL518
Atlanta (ATL) to Boston (BOS) · scheduled 7:55 PM – 10:30 PM
How DL518 performs
866 operations, 2023-07-01 to 2026-06-30.
DL518 arrived on time 70.3% of the time, against 77.1% for all ATL → BOS flights — this specific departure is 6.8 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 8.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 866 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL518 | 70.3% | 1.27% | -1 min | 11.7% | 866 |
| Delta Air Lines on ATL → BOS | 79.1% | 1.01% | -6 min | 6.5% | 10,893 |
| All ATL → BOS flights | 77.1% | 1.26% | -6 min | 7.9% | 15,009 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does DL518 run worse on particular days?
Wednesday is historically the most reliable day and Sunday the least, a gap of 11.8 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 DL518 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 |
|---|---|---|---|
| MCO→BOS Orlando to Boston | 2025-04-19 – 2026-01-04 | 15 | — |
| ECP→ATL Panama City Beach to Atlanta | 2025-08-09 – 2025-08-09 | 1 | — |
| BOS→LGA Boston to New York | 2025-05-10 – 2025-06-07 | 5 | — |
| MSP→OMA Minneapolis to Omaha | 2025-04-23 – 2025-04-23 | 1 | — |
| OMA→MSP Omaha to Minneapolis | 2025-04-23 – 2025-04-23 | 1 | — |
| ATL→GSP Atlanta to Greenville/Greer/Spartanburg | 2024-05-11 – 2024-06-01 | 5 | — |
| LGA→OMA New York to Omaha | 2024-05-04 – 2024-05-04 | 1 | — |
| CLE→MSP Cleveland to Minneapolis | 2024-04-23 – 2024-05-01 | 4 | — |
| MSP→CLE Minneapolis to Cleveland | 2024-04-23 – 2024-05-01 | 4 | — |
| MSP→BIS Minneapolis to Bismarck | 2024-01-13 – 2024-03-02 | 11 | — |
| ATL→CAE Atlanta to Columbia | 2024-01-07 – 2024-01-07 | 1 | — |
| CAE→ATL Columbia to Atlanta | 2024-01-07 – 2024-01-07 | 1 | — |
| SFO→ATL San Francisco to Atlanta | 2023-12-16 – 2023-12-30 | 13 | — |
| BOS→TPA Boston to Tampa | 2023-11-23 – 2023-11-23 | 1 | — |
| XNA→ATL Fayetteville/Springdale/Rogers to Atlanta | 2023-11-04 – 2023-11-04 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route DL518 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 866 records of DL518 operating ATL → 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.