Apparatus

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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
11:56 MDT
Timezone
America/Boise
Type
Large Airport
Elevation
2,871 ft
Coordinates
43.5644, -116.2230

cloud Weather

Wind
270° / 3 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
22°C / 8°C
Altimeter
30.00 inHg

Obs: 2026-08-28T16:53:00.000Z

Raw METAR / TAF 
METAR KBOI 281653Z 27003KT 10SM CLR 22/08 A3000 RMK AO2 SLP131 T02220078

TAF KBOI 281731Z 2818/2918 23006KT P6SM BKN120 FM282300 14013G20KT P6SM VCSH OVC120 PROB30 2901/2906 14018G28KT -SHRA OVC080 FM291400 14008KT P6SM BKN100

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
10:56 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
310° / 9 kt
Visibility
10 SM
Ceiling
FEW 400 ft, BKN 12,000 ft, OVC 20,000 ft
Temp / Dew
16°C / 14°C
Altimeter
30.01 inHg

Obs: 2026-08-28T16:56:00.000Z

Raw METAR / TAF 
METAR KSFO 281656Z 31009KT 10SM FEW004 BKN120 OVC200 16/14 A3001 RMK AO2 SLP163 T01610139

TAF KSFO 281739Z 2818/2924 30012KT P6SM VCSH BKN120 FM282000 29016KT P6SM VCSH BKN100 FM290700 29010KT P6SM FEW012 FM291000 29008KT P6SM SCT012 FM291800 29015KT P6SM FEW015

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A44187 BOI → SFO Jul 26, 07:16 UTCJul 26, 12:56 UTC5h 40m +156m -4m
2026-07-25 A44187 BOI → SFO Jul 25, 23:50 UTCJul 26, 12:55 UTC13h 6m - -
2026-07-24 A5CF3C BOI → SFO Jul 24, 05:45 UTCJul 24, 11:00 UTC5h 15m - -
2026-07-24 A5CF3C BOI → SFO Jul 24, 05:31 UTCJul 24, 11:13 UTC5h 42m +51m +3m
2026-07-22 A5CF19 BOI → SFO Jul 22, 11:10 UTCJul 22, 11:20 UTC10m - -
2026-07-21 A44213 BOI → SFO Jul 21, 09:40 UTCJul 21, 11:45 UTC2h 5m - -
2026-07-21 A44213 BOI → SFO Jul 21, 09:19 UTCJul 21, 15:14 UTC5h 55m +279m -7m
2026-07-21 A44213 BOI → SFO Jul 21, 09:19 UTCJul 21, 15:14 UTC5h 55m +279m -7m
2026-07-18 A126E6 BOI → SFO Jul 18, 21:45 UTCJul 19, 11:05 UTC13h 20m - -
2026-07-17 A2B154 - Jul 17, 07:05 UTCJul 17, 12:19 UTC5h 15m - -
2026-07-17 A2B154 GEO → IAH Jul 17, 06:46 UTCJul 17, 12:21 UTC5h 35m +126m -10m
2026-07-14 A43EEA GEO → IAH Jul 14, 05:39 UTCJul 14, 11:54 UTC6h 15m +59m +21m
2026-07-13 A43EEA - Jul 13, 22:25 UTCJul 14, 12:00 UTC13h 35m - -
2026-07-11 A12755 - Jul 11, 22:01 UTCJul 12, 11:05 UTC13h 5m - -
2026-07-10 A8E9FD GEO → IAH Jul 10, 05:11 UTCJul 10, 10:54 UTC5h 43m +31m -23m
2026-07-08 A2B10B - Jul 8, 05:55 UTCJul 8, 11:15 UTC5h 20m - -
2026-07-06 A12796 - Jul 6, 23:05 UTCJul 7, 10:50 UTC11h 45m - -
2026-07-04 A2B12E - Jul 4, 21:35 UTCJul 5, 10:55 UTC13h 20m - -
2026-07-03 A441F5 - Jul 3, 05:35 UTCJul 3, 10:55 UTC5h 20m - -
2026-06-28 A5CBF3 - Jun 28, 05:34 UTCJun 28, 10:50 UTC5h 15m - -
2026-06-25 A2B133 - Jun 25, 21:44 UTCJun 26, 10:39 UTC12h 55m - -
2026-06-23 A2B110 - Jun 23, 21:59 UTCJun 24, 10:45 UTC12h 45m - -
2026-06-21 A126E7 GEO → IAH Jun 21, 05:06 UTCJun 21, 10:57 UTC5h 51m +26m -4m
2026-06-18 A126E8 - Jun 18, 21:55 UTCJun 19, 10:59 UTC13h 4m - -
2026-06-16 A5CBF3 - Jun 16, 22:50 UTCJun 17, 11:10 UTC12h 20m - -
2026-06-16 A5CF82 - Jun 16, 06:10 UTCJun 16, 11:49 UTC5h 40m - -
2026-06-13 A123BF - Jun 13, 21:55 UTCJun 14, 11:00 UTC13h 5m - -
2026-06-12 A1272F BOI → SFO Jun 12, 05:06 UTCJun 12, 10:55 UTC5h 49m +26m +1m
2026-06-11 A1272F BOI → SFO Jun 11, 21:55 UTCJun 12, 10:45 UTC12h 51m - -
2026-06-09 A5CBF3 BOI → SFO Jun 9, 21:50 UTCJun 10, 10:50 UTC13h 0m - -

Performance history

Flights tracked
80 showing last 30
Avg arrival delay
-3m
On-time arrival
89% 89% on time
Aircraft used
21

Monthly activity 4 months

Month Flights tracked
July 2026 19
June 2026 16
May 2026 24
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 8h 30m from takeoff to landing.
How often does UAL438 fly?
UAL438 has been observed flying daily in our tracking data. We've recorded 80 flights under this callsign.
Is flight UAL438 usually on time?
Across recent flights, UAL438 arrives 3 minutes early on average. 89% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL438?
UAL438 has been operated by 21 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.