Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
DL 1791 · Atlanta (ATL) → San Juan (SJU)
Sold by Delta. Still flying: 40 of the last 56 days (Mon, Thu, Fri, Sat, Sun).
Arrives on time66%within 15 minutes, of 199 flights
Cancelled0.5%of scheduled flights
An hour or more late10%of flights that operated
When late, on average62 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves ATL
- 16:59
- Arrives SJU
- 20:43
- Flight time
- 3h 44m
- Days flown, last 8 weeks
- 40 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at ATL
All flights leaving Atlanta (ATL) at 4–5 pm, wherever they’re going: 73% left within 15 minutes and 1.7% were cancelled (22,354 flights in the year). Other Delta flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.