Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL399J

Operated by United Airlines

Live map

Live map filtered to UAL399J. Shown when the flight is currently airborne.

Route airports View route page →

Departure

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
00:30 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
190° / 4 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
26°C / 23°C
Altimeter
29.88 inHg

Obs: 2026-05-30T04:53:00.000Z

Raw METAR / TAF 
METAR KIAH 300453Z 19004KT 10SM CLR 26/23 A2988 RMK AO2 SLP118 T02610228

TAF KIAH 300520Z 3006/3112 19005KT P6SM FEW045 BKN250 FM301100 VRB03KT P6SM SCT010 BKN028 FM301500 21006KT P6SM FEW015 SCT030 FM301800 17009KT P6SM SCT040 BKN250 FM310300 18006KT P6SM FEW030 BKN250 FM311000 00000KT P6SM BKN030

flight Live Traffic

flight_takeoff 237 Departures
flight_land 180 Arrivals

Arrival

SFO KSFO IFR

San Francisco International Airport

San Francisco, US

Local time
22:30 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
290° / 13 kt
Visibility
10 SM
Ceiling
FEW 300 ft, BKN 800 ft, OVC 1,100 ft
Temp / Dew
13°C / 11°C
Altimeter
30.11 inHg

Obs: 2026-05-30T04:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300456Z 29013KT 10SM FEW003 BKN008 OVC011 13/11 A3011 RMK AO2 SLP195 T01280106

TAF KSFO 300520Z 3006/3112 26009KT P6SM OVC008 FM301000 27006KT P6SM OVC012 FM301800 28012KT P6SM SKC FM302300 27022KT P6SM SKC FM310600 28012KT P6SM SKC

warning FAA Advisories

  • Ground Delay: low ceilings (avg 1 hour and 45 minutes)

flight Live Traffic

flight_takeoff 212 Departures
flight_land 247 Arrivals

Recent history last 1

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-20 A5D6F9 IAH → SFO May 20, 02:05 UTCMay 20, 05:50 UTC3h 46m - -

Performance history

Flights tracked
1
Avg arrival delay
-
On-time arrival
-
Aircraft used
1

Monthly activity 1 month

Month Flights tracked
May 2026 1

UAL399J frequently asked

Where does flight UAL399J fly?
UAL399J (United Airlines) flies from IAH to SFO. View the full route page.
How long is flight UAL399J?
Based on observed flights, UAL399J takes on average 3h 46m from takeoff to landing.
How often does UAL399J fly?
UAL399J has been observed flying rarely in our tracking data. We've recorded 1 flight under this callsign.
Can I track UAL399J live?
Yes. When UAL399J is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.