Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL438

Operated by United Airlines

Live map

Live map filtered to UAL438. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BOI KBOI VFR

Boise Air Terminal/Gowen Field

Boise, US

Local time
21:30 MDT
Timezone
America/Boise
Type
Large Airport
Elevation
2,871 ft
Coordinates
43.5644, -116.2230

cloud Weather

Wind
280° / 9 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
21°C / 3°C
Altimeter
29.85 inHg

Obs: 2026-05-30T02:53:00.000Z

Raw METAR / TAF 
METAR KBOI 300253Z 28009KT 10SM CLR 21/03 A2985 RMK AO2 SLP087 T02110033 53016

TAF KBOI 292333Z 3000/3024 30014G23KT P6SM SCT150 FM300800 29011KT P6SM SCT200

flight Live Traffic

flight_takeoff 19 Departures
flight_land 30 Arrivals

Arrival

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
20:30 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 14 kt
Visibility
10 SM
Ceiling
FEW 300 ft, BKN 1,000 ft, BKN 3,500 ft
Temp / Dew
14°C / 11°C
Altimeter
30.09 inHg

Obs: 2026-05-30T02:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300256Z 27014KT 10SM FEW003 BKN010 BKN035 14/11 A3009 RMK AO2 SLP188 T01390111 53002

TAF KSFO 300301Z 3003/3106 27012KT P6SM BKN013 FM300600 26010KT P6SM OVC009 FM300900 26005KT P6SM BKN012 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 238 Departures
flight_land 258 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-28 A12711 BOI → SFO May 28, 23:25 UTCMay 29, 11:15 UTC11h 50m - -
2026-05-27 A5CBF3 BOI → SFO May 27, 05:01 UTCMay 27, 11:08 UTC6h 7m +21m +13m
2026-05-25 A2B196 BOI → SFO May 25, 23:24 UTCMay 26, 11:30 UTC12h 5m - -
2026-05-24 A1244D BOI → SFO May 24, 06:56 UTCMay 24, 12:48 UTC5h 52m +136m -10m
2026-05-24 A1244D BOI → SFO May 24, 07:15 UTCMay 24, 12:55 UTC5h 40m - -
2026-05-22 A1244D BOI → SFO May 22, 05:05 UTCMay 22, 11:06 UTC6h 1m +25m -9m
2026-05-21 A1244D BOI → SFO May 21, 22:00 UTCMay 22, 11:10 UTC13h 10m - -
2026-05-20 A2B176 BOI → SFO May 20, 05:15 UTCMay 20, 10:50 UTC5h 35m - -
2026-05-18 A5CC15 BOI → SFO May 18, 23:00 UTCMay 19, 11:00 UTC12h 0m - -
2026-05-17 A5CC11 BOI → SFO May 17, 05:00 UTCMay 17, 10:40 UTC5h 40m - -
2026-05-15 A5CF19 BOI → SFO May 15, 05:05 UTCMay 15, 11:00 UTC5h 55m - -
2026-05-13 A2B156 BOI → SFO May 13, 05:00 UTCMay 13, 10:50 UTC5h 50m - -
2026-05-13 A2B156 BOI → SFO May 13, 05:01 UTCMay 13, 10:50 UTC5h 49m +21m -12m
2026-05-12 A1277A BOI → SFO May 12, 05:20 UTCMay 12, 11:05 UTC5h 45m - -
2026-05-12 A1277A BOI → SFO May 12, 05:06 UTCMay 12, 11:04 UTC5h 58m +26m -9m
2026-05-10 A12778 BOI → SFO May 10, 09:20 UTCMay 10, 10:40 UTC1h 20m - -
2026-05-08 A2B176 BOI → SFO May 8, 05:09 UTCMay 8, 10:49 UTC5h 40m - -
2026-05-08 A2B176 BOI → SFO May 8, 05:01 UTCMay 8, 10:49 UTC5h 48m +21m -10m
2026-05-06 A126E7 BOI → SFO May 6, 05:00 UTCMay 6, 10:25 UTC5h 24m - -
2026-05-06 A126E7 BOI → SFO May 6, 05:01 UTCMay 6, 10:26 UTC5h 25m +21m -18m
2026-05-02 A2B12D BOI → SFO May 2, 22:00 UTCMay 3, 10:55 UTC12h 54m - -
2026-05-01 A126C3 BOI → SFO May 1, 05:48 UTCMay 1, 12:02 UTC6h 14m +68m +4m
2026-04-30 A126C3 BOI → SFO Apr 30, 23:00 UTCMay 1, 11:55 UTC12h 55m - -
2026-04-29 A12731 BOI → SFO Apr 29, 05:20 UTCApr 29, 11:00 UTC5h 41m - -
2026-04-29 A12731 BOI → SFO Apr 29, 05:01 UTCApr 29, 10:57 UTC5h 56m +21m -3m
2026-04-27 A12777 BOI → SFO Apr 27, 21:50 UTCApr 28, 10:55 UTC13h 5m - -
2026-04-26 A5CC37 BOI → SFO Apr 26, 05:46 UTCApr 26, 11:47 UTC6h 1m +66m -17m
2026-04-24 A2B10C BOI → SFO Apr 24, 05:10 UTCApr 24, 10:50 UTC5h 40m - -
2026-04-24 A2B10C BOI → SFO Apr 24, 05:01 UTCApr 24, 10:49 UTC5h 48m +21m -8m
2026-04-22 A126ED BOI → SFO Apr 22, 10:25 UTCApr 22, 12:45 UTC2h 20m - -

Performance history

Flights tracked
43 showing last 30
Avg arrival delay
-7m
On-time arrival
100% 100% on time
Aircraft used
19

Monthly activity 2 months

Month Flights tracked
May 2026 22
April 2026 21

UAL438 frequently asked

Where does flight UAL438 fly?
UAL438 (United Airlines) flies from BOI to SFO. View the full route page.
How long is flight UAL438?
Based on observed flights, UAL438 takes on average 7h 7m from takeoff to landing.
How often does UAL438 fly?
UAL438 has been observed flying several times a week in our tracking data. We've recorded 43 flights under this callsign.
Is flight UAL438 usually on time?
Across recent flights, UAL438 arrives 7 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL438?
UAL438 has been operated by 19 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL438 live?
Yes. When UAL438 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.