UAL399
- Flight number
- UAL399
- Airline
- United Airlines (UAL)
- Route
- Jacksonville International Airport (JAX/KJAX) → Newark Liberty International Airport (EWR/KEWR)
- Observed take-off
- Observed landing
- Aircraft
- N27464 · BOEING 737 MAX 9
- Positions recorded
- 4088
- Time airborne
- 104 min
Source: observations by the map.flights community network of ADS-B receivers; times in UTC.