Apparatus

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flight_takeoff Flight

UAL477

Operated by United Airlines

Live map

Live map filtered to UAL477. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BOS KBOS VFR

Boston Logan International Airport

Boston, US

Local time
08:45 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
220° / 4 kt
Visibility
10 SM
Ceiling
SCT 1,000 ft, BKN 14,000 ft
Temp / Dew
23°C / 21°C
Altimeter
29.99 inHg

Obs: 2026-08-28T12:15:00.000Z

Raw METAR / TAF 
SPECI KBOS 281215Z 22004KT 10SM SCT010 BKN140 23/21 A2999 RMK AO2 T02330206

TAF KBOS 281120Z 2812/2918 19007KT P6SM SCT010 SCT025 FM281500 12005KT P6SM BKN050 PROB30 2818/2821 4SM TSRA OVC040CB FM282300 21004KT P6SM BKN100 FM290300 33007KT P6SM SCT090 FM291500 04008KT P6SM FEW250

flight Live Traffic

flight_takeoff 153 Departures
flight_land 166 Arrivals

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
05:45 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
300° / 9 kt
Visibility
10 SM
Ceiling
FEW 400 ft, BKN 20,000 ft
Temp / Dew
15°C / 13°C
Altimeter
29.93 inHg

Obs: 2026-08-28T11:56:00.000Z

Raw METAR / TAF 
METAR KSFO 281156Z 30009KT 10SM FEW004 BKN200 15/13 A2993 RMK AO2 SLP133 T01500128 10156 20150 56006 $

TAF KSFO 281126Z 2812/2918 31010KT P6SM FEW004 BKN200 FM281500 28006KT P6SM VCSH OVC050 FM282100 28016KT P6SM OVC100 FM291000 27011KT P6SM SCT010

flight Live Traffic

flight_takeoff 126 Departures
flight_land 127 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A2B151 BOS → SFO Jul 26, 21:55 UTCJul 26, 22:15 UTC20m - -
2026-07-25 A4423B BOS → SFO Jul 25, 22:20 UTCJul 26, 02:35 UTC4h 15m - -
2026-07-25 AA56DB BOS → SFO Jul 25, 04:40 UTCJul 25, 09:15 UTC4h 35m - -
2026-07-25 AA56DB BOS → SFO Jul 25, 04:50 UTCJul 25, 09:18 UTC4h 28m +40m -7m
2026-07-24 A126E7 BOS → SFO Jul 24, 22:20 UTCJul 25, 02:40 UTC4h 20m - -
2026-07-24 A1242D BOS → SFO Jul 24, 04:35 UTCJul 24, 09:10 UTC4h 35m - -
2026-07-23 A2B134 BOS → SFO Jul 23, 22:55 UTCJul 24, 03:05 UTC4h 10m - -
2026-07-22 A44166 BOS → SFO Jul 22, 22:30 UTCJul 23, 02:45 UTC4h 15m - -
2026-07-21 A2B4EA BOS → SFO Jul 21, 22:15 UTCJul 22, 02:40 UTC4h 25m - -
2026-07-20 A43E60 BOS → SFO Jul 20, 22:45 UTCJul 21, 03:15 UTC4h 29m - -
2026-07-20 A126E7 BOS → SFO Jul 20, 04:50 UTCJul 20, 09:25 UTC4h 35m - -
2026-07-19 A5CC12 BOS → SFO Jul 19, 22:10 UTCJul 20, 02:30 UTC4h 20m - -
2026-07-18 A2B17A BOS → SFO Jul 18, 22:35 UTCJul 19, 02:45 UTC4h 10m - -
2026-07-18 AA4C3E BOS → SFO Jul 18, 04:30 UTCJul 18, 09:10 UTC4h 40m - -
2026-07-18 AA4C3E BOS → SFO Jul 18, 04:35 UTCJul 18, 09:20 UTC4h 45m +25m -1m
2026-07-17 A12710 BOS → SFO Jul 17, 23:00 UTCJul 18, 03:15 UTC4h 16m - -
2026-07-17 A4423B - Jul 17, 04:35 UTCJul 17, 09:15 UTC4h 40m - -
2026-07-16 A126EB ANC → SFO Jul 16, 22:40 UTCJul 17, 02:59 UTC4h 20m - -
2026-07-16 A2B12D - Jul 16, 02:30 UTCJul 16, 02:50 UTC20m - -
2026-07-15 A2B12D ANC → SFO Jul 15, 22:22 UTCJul 16, 02:15 UTC3h 53m +17m -25m
2026-07-15 A2B12D - Jul 15, 22:25 UTCJul 16, 02:50 UTC4h 25m - -
2026-07-14 A4423A - Jul 14, 22:10 UTCJul 15, 02:35 UTC4h 24m - -
2026-07-13 A441F5 ANC → SFO Jul 13, 22:22 UTCJul 14, 02:25 UTC4h 3m +17m -11m
2026-07-13 A441F5 - Jul 13, 22:15 UTCJul 14, 02:30 UTC4h 15m - -
2026-07-13 A5CF41 - Jul 13, 04:35 UTCJul 13, 09:20 UTC4h 45m - -
2026-07-12 A12711 ANC → SFO Jul 12, 22:15 UTCJul 13, 02:25 UTC4h 10m - -
2026-07-11 A12732 - Jul 11, 22:10 UTCJul 12, 02:30 UTC4h 20m - -
2026-07-11 A14AD1 - Jul 11, 04:25 UTCJul 11, 09:00 UTC4h 35m - -
2026-07-11 A14AD1 SFO → RDU Jul 11, 04:35 UTCJul 11, 08:59 UTC4h 24m +25m -3m
2026-07-10 A44212 ANC → SFO Jul 10, 22:20 UTCJul 11, 02:40 UTC4h 20m - -

Performance history

Flights tracked
171 showing last 30
Avg arrival delay
-9m
On-time arrival
100% 100% on time
Aircraft used
22

Monthly activity 4 months

Month Flights tracked
July 2026 49
June 2026 45
May 2026 45
April 2026 32

UAL477 frequently asked

Where does flight UAL477 fly?
UAL477 (United Airlines) flies from BOS to SFO. View the full route page.
How long is flight UAL477?
Based on observed flights, UAL477 takes on average 4h 7m from takeoff to landing.
How often does UAL477 fly?
UAL477 has been observed flying several times a week in our tracking data. We've recorded 171 flights under this callsign.
Is flight UAL477 usually on time?
Across recent flights, UAL477 arrives 9 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL477?
UAL477 has been operated by 22 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL477 live?
Yes. When UAL477 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.