Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
DL 840 · Denver (DEN) → Atlanta (ATL)
Sold by Delta. Still flying: 55 of the last 56 days (Daily).
Arrives on time82%within 15 minutes, of 317 flights
Cancelled1.9%of scheduled flights
An hour or more late8%of flights that operated
When late, on average81 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Atlanta is 2 h ahead of Denver).
- Leaves DEN
- 16:43
- Arrives ATL
- 21:54
- Flight time
- 3h 11m
- Days flown, last 8 weeks
- 55 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 DEN
All flights leaving Denver (DEN) at 4–5 pm, wherever they’re going: 70% left within 15 minutes and 1.0% were cancelled (15,056 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.