Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL3938

Operated by United Airlines

Live map

Live map filtered to UAL3938. Shown when the flight is currently airborne.

Route airports View route page →

Departure

SEA KSEA VFR

Seattle–Tacoma International Airport

Seattle, US

Local time
17:49 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
280° / 3 kt
Visibility
10 SM
Ceiling
FEW 2,500 ft, FEW 3,500 ft, BKN 6,500 ft
Temp / Dew
15°C / 8°C
Altimeter
30.08 inHg

Obs: 2026-05-29T23:53:00.000Z

Raw METAR / TAF 
METAR KSEA 292353Z 28003KT 10SM FEW025 FEW035 BKN065 15/08 A3008 RMK AO2 SLP192 60002 T01500078 10156 20089 51007 $

TAF KSEA 292339Z 3000/3106 03005KT P6SM FEW020 BKN035 FM300300 03010KT P6SM BKN050 FM301200 10005KT P6SM BKN030 FM301900 28006KT P6SM BKN070

flight Live Traffic

flight_takeoff 230 Departures
flight_land 268 Arrivals

Arrival

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
17:49 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
260° / 12 kt
Visibility
10 SM
Ceiling
FEW 600 ft, BKN 2,000 ft, BKN 3,500 ft
Temp / Dew
16°C / 11°C
Altimeter
30.08 inHg

Obs: 2026-05-29T23:56:00.000Z

Raw METAR / TAF 
METAR KSFO 292356Z 26012KT 10SM FEW006 BKN020 BKN035 16/11 A3008 RMK AO2 SLP186 60000 T01560106 10172 20150 50000

TAF KSFO 292320Z 3000/3106 27012KT P6SM BKN025 FM300400 26010KT P6SM OVC010 FM300900 26005KT P6SM BKN015 FM301700 29010KT P6SM SKC FM302000 28018KT P6SM SKC

warning FAA Advisories

  • Ground Delay: low ceilings (avg 1 hour and 5 minutes)

flight Live Traffic

flight_takeoff 252 Departures
flight_land 271 Arrivals

Recent history last 15

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-23 A56A18 SEA → SFO May 23, 05:40 UTCMay 23, 07:50 UTC2h 10m - -
2026-05-19 A44187 SEA → SFO May 19, 13:25 UTCMay 19, 18:20 UTC4h 55m - -
2026-05-18 A0A900 SEA → SFO May 18, 09:50 UTCMay 18, 16:15 UTC6h 25m - -
2026-05-10 A8AFEC SEA → SFO May 10, 14:45 UTCMay 10, 17:30 UTC2h 45m - -
2026-05-08 A8DD7B SEA → SFO May 8, 21:40 UTCMay 8, 22:00 UTC20m - -
2026-05-08 A8DD7B SEA → SFO May 8, 12:19 UTCMay 8, 21:24 UTC9h 5m +24m -16m
2026-05-08 A8DD7B SEA → SFO May 8, 12:25 UTCMay 8, 14:50 UTC2h 25m - -
2026-05-05 A7F4E7 SEA → SFO May 5, 02:25 UTCMay 5, 06:00 UTC3h 35m - -
2026-04-30 A1F1A0 SEA → SFO Apr 30, 01:59 UTCApr 30, 13:40 UTC11h 41m +29m +2m
2026-04-30 A1F1A0 SEA → SFO Apr 30, 01:50 UTCApr 30, 13:40 UTC11h 50m - -
2026-04-28 A12B2B SEA → SFO Apr 28, 07:30 UTCApr 28, 08:25 UTC55m - -
2026-04-17 A2F200 - Apr 17, 15:20 UTCApr 17, 16:50 UTC1h 30m - -
2026-04-14 AA7E74 - Apr 14, 18:55 UTCApr 14, 19:40 UTC45m - -
2026-04-14 AA7E74 - Apr 14, 16:50 UTCApr 14, 18:45 UTC1h 55m - -
2026-04-14 AA7E74 PDX → ORD Apr 14, 16:11 UTCApr 14, 19:20 UTC3h 9m +71m -10m

Performance history

Flights tracked
15
Avg arrival delay
-8m
On-time arrival
100% 100% on time
Aircraft used
10

Monthly activity 2 months

Month Flights tracked
May 2026 8
April 2026 7

UAL3938 frequently asked

Where does flight UAL3938 fly?
UAL3938 (United Airlines) flies from SEA to SFO. View the full route page.
How long is flight UAL3938?
Based on observed flights, UAL3938 takes on average 4h 14m from takeoff to landing.
How often does UAL3938 fly?
UAL3938 has been observed flying several times a week in our tracking data. We've recorded 15 flights under this callsign.
Is flight UAL3938 usually on time?
Across recent flights, UAL3938 arrives 8 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL3938?
UAL3938 has been operated by 10 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL3938 live?
Yes. When UAL3938 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.