Apparatus

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flight_takeoff Flight

UAL2157

Operated by United Airlines

Live map

Live map filtered to UAL2157. Shown when the flight is currently airborne.

Route airports View route page →

Departure

SEA KSEA MVFR

Seattle–Tacoma International Airport

Seattle, US

Local time
00:36 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
220° / 4 kt
Visibility
10 SM
Ceiling
BKN 2,800 ft, OVC 5,000 ft
Temp / Dew
16°C / 11°C
Altimeter
30.01 inHg

Obs: 2026-08-29T06:53:00.000Z

Raw METAR / TAF 
METAR KSEA 290653Z 22004KT 10SM BKN028 OVC050 16/11 A3001 RMK AO2 SLP166 T01560111 $

TAF KSEA 290525Z 2906/3012 01008KT P6SM SCT050 BKN070 FM290800 19007KT P6SM -SHRA OVC030 FM291100 19006KT P6SM -SHRA BKN025 OVC030 FM291800 21007KT P6SM -SHRA SCT020 OVC030 FM292000 23008KT P6SM -SHRA SCT025 BKN040 FM300000 25008KT P6SM SCT050 BKN100

flight Live Traffic

flight_takeoff 213 Departures
flight_land 130 Arrivals

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
00:36 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
300° / 11 kt
Visibility
10 SM
Ceiling
FEW 300 ft, FEW 20,000 ft
Temp / Dew
14°C / 13°C
Altimeter
29.97 inHg

Obs: 2026-08-29T06:56:00.000Z

Raw METAR / TAF 
METAR KSFO 290656Z 30011KT 10SM FEW003 FEW200 14/13 A2997 RMK AO2 SLP148 T01390128 $

TAF KSFO 290520Z 2906/3012 28014KT P6SM FEW012 TEMPO 2906/2908 BKN012 FM290800 29008KT P6SM OVC012 FM291800 29015G25KT P6SM FEW015 FM300500 27012KT P6SM BKN010

flight Live Traffic

flight_takeoff 208 Departures
flight_land 128 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A61D00 SEA → SFO Jul 26, 01:50 UTCJul 26, 04:15 UTC2h 25m - -
2026-07-25 A55B3C SEA → SFO Jul 25, 02:10 UTCJul 25, 04:55 UTC2h 45m - -
2026-07-25 A55B3C SEA → SFO Jul 25, 02:15 UTCJul 25, 04:51 UTC2h 36m +50m -10m
2026-07-24 A611DB SEA → SFO Jul 24, 02:15 UTCJul 24, 04:50 UTC2h 35m - -
2026-07-23 A611DB SEA → SFO Jul 23, 01:50 UTCJul 23, 04:35 UTC2h 45m - -
2026-07-22 A5A2CC SEA → SFO Jul 22, 02:45 UTCJul 22, 05:20 UTC2h 35m - -
2026-07-21 A5EA5C SEA → SFO Jul 21, 01:45 UTCJul 21, 04:10 UTC2h 25m - -
2026-07-20 A5AA3A SEA → SFO Jul 20, 01:40 UTCJul 20, 04:05 UTC2h 25m - -
2026-07-19 A5A2CC - Jul 19, 02:55 UTCJul 19, 05:30 UTC2h 35m - -
2026-07-19 A5A2CC IAH → SLC Jul 19, 02:50 UTCJul 19, 05:25 UTC2h 35m +85m -7m
2026-07-18 A5AA3A - Jul 18, 01:54 UTCJul 18, 04:25 UTC2h 31m - -
2026-07-17 A5A2CC - Jul 17, 01:55 UTCJul 17, 04:35 UTC2h 40m - -
2026-07-16 A5F1CA - Jul 16, 01:45 UTCJul 16, 04:15 UTC2h 30m - -
2026-07-15 A62F93 - Jul 15, 01:40 UTCJul 15, 04:10 UTC2h 30m - -
2026-07-14 A57B4D - Jul 14, 01:55 UTCJul 14, 04:30 UTC2h 35m - -
2026-07-13 A582BB - Jul 13, 01:50 UTCJul 13, 04:25 UTC2h 35m - -
2026-07-12 A5E44C - Jul 12, 01:55 UTCJul 12, 04:30 UTC2h 35m - -
2026-07-11 A582BB IAH → SLC Jul 11, 02:05 UTCJul 11, 04:45 UTC2h 40m - -
2026-07-10 A5D927 - Jul 10, 01:55 UTCJul 10, 04:35 UTC2h 40m - -
2026-07-09 A5D927 - Jul 9, 02:00 UTCJul 9, 04:40 UTC2h 40m - -
2026-07-08 A56661 - Jul 8, 02:45 UTCJul 8, 05:25 UTC2h 40m - -
2026-07-07 A5FCEF IAH → SLC Jul 7, 02:10 UTCJul 7, 04:50 UTC2h 40m - -
2026-07-06 A61949 IAH → SLC Jul 6, 02:45 UTCJul 6, 05:35 UTC2h 50m - -
2026-07-04 A5FCEF - Jul 4, 02:00 UTCJul 4, 04:35 UTC2h 35m - -
2026-07-03 A56A18 - Jul 3, 02:40 UTCJul 3, 05:15 UTC2h 35m - -
2026-07-02 A55785 - Jul 2, 01:50 UTCJul 2, 04:20 UTC2h 30m - -
2026-07-01 A56A18 - Jul 1, 01:50 UTCJul 1, 04:30 UTC2h 40m - -
2026-06-30 A5B55F - Jun 30, 01:40 UTCJun 30, 04:20 UTC2h 40m - -
2026-06-29 AB1644 - Jun 29, 01:55 UTCJun 29, 04:30 UTC2h 35m - -
2026-06-28 A59B5E - Jun 28, 01:50 UTCJun 28, 04:29 UTC2h 40m - -

Performance history

Flights tracked
124 showing last 30
Avg arrival delay
-8m
On-time arrival
100% 100% on time
Aircraft used
20

Monthly activity 4 months

Month Flights tracked
July 2026 27
June 2026 34
May 2026 34
April 2026 29

UAL2157 frequently asked

Where does flight UAL2157 fly?
UAL2157 (United Airlines) flies from SEA to SFO. View the full route page.
How long is flight UAL2157?
Based on observed flights, UAL2157 takes on average 2h 36m from takeoff to landing.
How often does UAL2157 fly?
UAL2157 has been observed flying daily in our tracking data. We've recorded 124 flights under this callsign.
Is flight UAL2157 usually on time?
Across recent flights, UAL2157 arrives 8 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL2157?
UAL2157 has been operated by 20 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL2157 live?
Yes. When UAL2157 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.