Apparatus

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flight_takeoff Flight

UAL1573

Operated by United Airlines

Live map

Live map filtered to UAL1573. Shown when the flight is currently airborne.

Route airports View route page →

Departure

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
00:29 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 10 kt
Visibility
10 SM
Ceiling
OVC 1,000 ft
Temp / Dew
13°C / 11°C
Altimeter
30.11 inHg

Obs: 2026-05-30T06:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300656Z 27010KT 10SM OVC010 13/11 A3011 RMK AO2 SLP195 T01280106

TAF KSFO 300520Z 3006/3112 26009KT P6SM OVC008 FM301000 27006KT P6SM OVC012 FM301800 28012KT P6SM SKC FM302300 27022KT P6SM SKC FM310600 28012KT P6SM SKC

flight Live Traffic

flight_takeoff 235 Departures
flight_land 165 Arrivals

Arrival

BOS KBOS VFR

Boston Logan International Airport

Boston, US

Local time
03:29 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
170° / 8 kt
Visibility
10 SM
Ceiling
SCT 5,000 ft, BKN 8,000 ft, BKN 11,000 ft
Temp / Dew
14°C / 12°C
Altimeter
29.59 inHg
Wx
-RA

Obs: 2026-05-30T06:54:00.000Z

Raw METAR / TAF 
METAR KBOS 300654Z 17008KT 10SM -RA SCT050 BKN080 BKN110 14/12 A2959 RMK AO2 RAB43 SLP019 P0000 T01390117

TAF KBOS 300537Z 3006/3112 12012G20KT P6SM -SHRA OVC040 FM300700 08013KT P6SM BKN030 FM301000 36020G32KT P6SM VCSH SCT010 OVC015 FM301200 03025G44KT 3SM RA BR SCT008 OVC010 FM302200 01017G28KT P6SM VCSH BKN020 FM310000 01013G20KT P6SM BKN060 FM310300 33010KT P6SM SCT250

flight Live Traffic

flight_takeoff 38 Departures
flight_land 43 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-30 A445F2 SFO → BOS May 30, 00:15 UTCMay 30, 04:50 UTC4h 35m - -
2026-05-29 A837A6 SFO → BOS May 29, 00:00 UTCMay 29, 04:30 UTC4h 30m - -
2026-05-29 A837A6 SFO → BOS May 29, 00:05 UTCMay 29, 04:30 UTC4h 25m +16m +4m
2026-05-28 A83782 SFO → BOS May 28, 01:00 UTCMay 28, 05:20 UTC4h 20m - -
2026-05-26 A4943F SFO → BOS May 26, 23:54 UTCMay 27, 04:19 UTC4h 25m - -
2026-05-26 A4943F SFO → BOS May 26, 00:00 UTCMay 26, 04:30 UTC4h 30m - -
2026-05-26 A4943F SFO → BOS May 26, 00:05 UTCMay 26, 04:29 UTC4h 24m +16m -2m
2026-05-24 A46D70 SFO → BOS May 24, 00:00 UTCMay 24, 04:25 UTC4h 25m - -
2026-05-23 AA2BA5 SFO → BOS May 23, 00:05 UTCMay 23, 04:35 UTC4h 29m - -
2026-05-22 A4491D SFO → BOS May 22, 00:25 UTCMay 22, 04:55 UTC4h 30m - -
2026-05-20 A4455E SFO → BOS May 20, 23:50 UTCMay 21, 04:15 UTC4h 25m - -
2026-05-19 A4455E SFO → BOS May 19, 23:55 UTCMay 20, 04:20 UTC4h 25m - -
2026-05-18 A4943F SFO → BOS May 18, 23:55 UTCMay 19, 04:30 UTC4h 35m - -
2026-05-18 A2FBF1 SFO → BOS May 18, 00:15 UTCMay 18, 04:30 UTC4h 15m - -
2026-05-16 A8D489 SFO → BOS May 16, 23:55 UTCMay 17, 04:25 UTC4h 30m - -
2026-05-15 A6C248 SFO → BOS May 15, 23:55 UTCMay 16, 04:25 UTC4h 30m - -
2026-05-15 AAA244 SFO → BOS May 15, 00:10 UTCMay 15, 04:45 UTC4h 35m - -
2026-05-14 A8AD4E SFO → BOS May 14, 00:00 UTCMay 14, 04:30 UTC4h 30m - -
2026-05-12 A85F29 SFO → BOS May 12, 23:55 UTCMay 13, 04:20 UTC4h 25m - -
2026-05-12 A4453E SFO → BOS May 12, 02:45 UTCMay 12, 04:15 UTC1h 30m - -
2026-05-11 AA1368 SFO → BOS May 11, 00:00 UTCMay 11, 04:20 UTC4h 20m - -
2026-05-09 A8D4B0 SFO → BOS May 9, 23:55 UTCMay 10, 04:15 UTC4h 20m - -
2026-05-09 A2DFFE SFO → BOS May 9, 00:05 UTCMay 9, 04:35 UTC4h 30m - -
2026-05-07 A81001 SFO → BOS May 7, 23:55 UTCMay 8, 04:14 UTC4h 20m - -
2026-05-06 A91536 SFO → BOS May 6, 23:55 UTCMay 7, 04:05 UTC4h 10m - -
2026-05-06 A91536 SFO → BOS May 6, 23:58 UTCMay 7, 04:01 UTC4h 3m +16m -5m
2026-05-05 A923A9 SFO → BOS May 5, 23:50 UTCMay 6, 03:45 UTC3h 55m - -
2026-05-05 A44565 SFO → BOS May 5, 00:10 UTCMay 5, 04:10 UTC4h 0m - -
2026-05-04 AA8A09 SFO → BOS May 4, 00:15 UTCMay 4, 04:24 UTC4h 10m - -
2026-05-02 A94AE5 SFO → BOS May 2, 23:55 UTCMay 3, 04:25 UTC4h 29m - -

Performance history

Flights tracked
61 showing last 30
Avg arrival delay
-1m
On-time arrival
100% 100% on time
Aircraft used
24

Monthly activity 2 months

Month Flights tracked
May 2026 32
April 2026 29

UAL1573 frequently asked

Where does flight UAL1573 fly?
UAL1573 (United Airlines) flies from SFO to BOS. View the full route page.
How long is flight UAL1573?
Based on observed flights, UAL1573 takes on average 4h 17m from takeoff to landing.
How often does UAL1573 fly?
UAL1573 has been observed flying several times a week in our tracking data. We've recorded 61 flights under this callsign.
Is flight UAL1573 usually on time?
Across recent flights, UAL1573 arrives 1 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL1573?
UAL1573 has been operated by 24 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL1573 live?
Yes. When UAL1573 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.