Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL673

Operated by United Airlines

Live map

Live map filtered to UAL673. Shown when the flight is currently airborne.

Route airports View route page →

Departure

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
08:13 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
290° / 9 kt
Visibility
10 SM
Ceiling
FEW 400 ft, BKN 12,000 ft, OVC 20,000 ft
Temp / Dew
16°C / 13°C
Altimeter
30.00 inHg
Wx
-RA

Obs: 2026-08-28T14:56:00.000Z

Raw METAR / TAF 
METAR KSFO 281456Z 29009KT 10SM -RA FEW004 BKN120 OVC200 16/13 A3000 RMK AO2 RAB52 SLP157 P0000 60000 T01610133 53024

TAF KSFO 281447Z 2815/2918 28009KT P6SM VCSH OVC150 FM282000 28016KT P6SM OVC100 FM291000 27011KT P6SM SCT010

flight Live Traffic

flight_takeoff 108 Departures
flight_land 220 Arrivals

Arrival

BOS KBOS MVFR

Boston Logan International Airport

Boston, US

Local time
11:13 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
280° / 7 kt
Visibility
10 SM
Ceiling
BKN 2,500 ft, BKN 3,300 ft, BKN 16,000 ft, BKN 25,000 ft
Temp / Dew
27°C / 19°C
Altimeter
30.00 inHg

Obs: 2026-08-28T14:54:00.000Z

Raw METAR / TAF 
METAR KBOS 281454Z 28007KT 10SM BKN025 BKN033 BKN160 BKN250 27/19 A3000 RMK AO2 SLP158 T02670194 53002

TAF KBOS 281449Z 2815/2918 27006KT P6SM FEW025 FM281600 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 235 Departures
flight_land 212 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A75103 SFO → BOS Jul 26, 14:40 UTCJul 26, 21:55 UTC7h 15m - -
2026-07-25 AABA9A SFO → BOS Jul 25, 15:20 UTCJul 26, 03:10 UTC11h 50m - -
2026-07-24 AAC136 SFO → BOS Jul 24, 14:35 UTCJul 24, 23:30 UTC8h 55m - -
2026-07-24 AAC136 SFO → BOS Jul 24, 14:31 UTCJul 25, 02:09 UTC11h 38m +21m -5m
2026-07-23 AACC5B SFO → BOS Jul 23, 14:45 UTCJul 24, 02:35 UTC11h 50m - -
2026-07-23 AACC5B SFO → BOS Jul 23, 14:31 UTCJul 24, 02:29 UTC11h 58m +21m +9m
2026-07-22 A1D546 SFO → BOS Jul 22, 14:30 UTCJul 23, 02:00 UTC11h 30m - -
2026-07-21 AA4440 SFO → BOS Jul 21, 14:55 UTCJul 22, 02:20 UTC11h 25m - -
2026-07-21 AA4440 SFO → BOS Jul 21, 15:01 UTCJul 22, 02:14 UTC11h 13m +51m -5m
2026-07-20 AAC4ED SFO → BOS Jul 20, 14:30 UTCJul 20, 15:15 UTC45m - -
2026-07-20 AAC4ED SFO → BOS Jul 20, 14:31 UTCJul 21, 02:02 UTC11h 31m +21m -8m
2026-07-19 AACC5B - Jul 19, 14:50 UTCJul 19, 16:45 UTC1h 55m - -
2026-07-19 AACC5B SFO → BOS Jul 19, 14:51 UTCJul 20, 02:18 UTC11h 27m +41m +9m
2026-07-18 AA99B7 BCN → SFO Jul 18, 14:45 UTCJul 19, 02:30 UTC11h 45m - -
2026-07-17 AA92F8 - Jul 17, 15:25 UTCJul 17, 17:25 UTC2h 0m - -
2026-07-17 AA92F8 BCN → SFO Jul 17, 15:12 UTCJul 18, 02:58 UTC11h 46m +62m -11m
2026-07-17 AA92F8 BCN → SFO Jul 17, 15:12 UTCJul 18, 02:44 UTC11h 32m +62m -25m
2026-07-16 AACC5B - Jul 16, 14:50 UTCJul 17, 02:34 UTC11h 45m - -
2026-07-15 A43667 BCN → SFO Jul 15, 14:31 UTCJul 16, 02:04 UTC11h 33m +21m -6m
2026-07-15 A43667 - Jul 15, 14:35 UTCJul 16, 02:10 UTC11h 35m - -
2026-07-14 AA92F8 BCN → SFO Jul 14, 14:31 UTCJul 15, 01:39 UTC11h 8m +21m -26m
2026-07-14 AA92F8 - Jul 14, 14:20 UTCJul 15, 01:50 UTC11h 29m - -
2026-07-13 AAC8A4 - Jul 13, 14:35 UTCJul 14, 02:20 UTC11h 45m - -
2026-07-12 AABA9A - Jul 12, 14:45 UTCJul 13, 02:35 UTC11h 50m - -
2026-07-11 AAD3C9 BCN → SFO Jul 11, 17:21 UTCJul 12, 04:54 UTC11h 33m +191m +6m
2026-07-11 AAD3C9 - Jul 11, 17:30 UTCJul 12, 04:55 UTC11h 25m - -
2026-07-10 AABD7F - Jul 10, 15:25 UTCJul 11, 03:10 UTC11h 45m - -
2026-07-09 AA441C BCN → SFO Jul 9, 14:31 UTCJul 10, 01:59 UTC11h 28m +21m -4m
2026-07-09 AA441C BCN → SFO Jul 9, 14:31 UTCJul 10, 01:56 UTC11h 25m +21m -7m
2026-07-09 AA441C - Jul 9, 14:30 UTCJul 9, 17:55 UTC3h 25m - -

Performance history

Flights tracked
158 showing last 30
Avg arrival delay
-6m
On-time arrival
100% 100% on time
Aircraft used
14

Monthly activity 4 months

Month Flights tracked
July 2026 45
June 2026 43
May 2026 46
April 2026 24

UAL673 frequently asked

Where does flight UAL673 fly?
UAL673 (United Airlines) flies from SFO to BOS. View the full route page.
How long is flight UAL673?
Based on observed flights, UAL673 takes on average 10h 5m from takeoff to landing.
How often does UAL673 fly?
UAL673 has been observed flying several times a week in our tracking data. We've recorded 158 flights under this callsign.
Is flight UAL673 usually on time?
Across recent flights, UAL673 arrives 6 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL673?
UAL673 has been operated by 14 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL673 live?
Yes. When UAL673 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.