tailodds FORECAST

Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

DELTA · FLIGHT DL 399 SCHEDULED · TYPICAL SCHEDULE

DL 399 · BOS → ATL

departs 4:30 PM ET · arrives 7:38 PM ET
Forecast issued Wed 4:00 PM ET · 48h before departure
Arrive at ATL more than 15 minutes late?
37% chance · ±6 pts +13 pts · 24h
HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 3.8d Now 1d 12h 6h Departs Lands

How late will it get to ATL?

  1. On time or early
    63%
  2. 15–30 min late
    0%
  3. 30 min–1 hour late
    19%
  4. 1–2 hours late
    9%
  5. Over 2 hours late
    8%
  6. Cancelled
    1%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.