Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL4212

Operated by United Airlines

Live map

Live map filtered to UAL4212. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BFI KBFI VFR

King County International Airport - Boeing Field

Seattle, US

Local time
23:50 PDT
Timezone
America/Los_Angeles
Type
Medium Airport
Elevation
21 ft
Coordinates
47.5270, -122.2999

cloud Weather

Wind
150° / 6 kt
Visibility
10 SM
Ceiling
BKN 4,900 ft, BKN 6,000 ft, BKN 7,000 ft
Temp / Dew
17°C / 10°C
Altimeter
30.09 inHg

Obs: 2026-08-30T05:53:00.000Z

Raw METAR / TAF 
METAR KBFI 300553Z 15006KT 10SM BKN049 BKN060 BKN070 17/10 A3009 RMK AO2 SLP190 60000 T01670100 10206 20167 51016

TAF KBFI 300520Z 3006/3106 17005KT P6SM BKN070 FM300900 17004KT P6SM OVC050 FM301400 20006KT P6SM BKN035 FM301900 16004KT P6SM SCT025 BKN030 FM302100 25004KT P6SM BKN100

flight Live Traffic

flight_takeoff 8 Departures
flight_land 12 Arrivals

Arrival

SEA KSEA VFR

Seattle–Tacoma International Airport

Seattle, US

Local time
23:50 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
220° / 11 kt
Visibility
10 SM
Ceiling
BKN 5,500 ft
Temp / Dew
15°C / 10°C
Altimeter
30.10 inHg

Obs: 2026-08-30T05:53:00.000Z

Raw METAR / TAF 
METAR KSEA 300553Z 22011KT 10SM BKN055 15/10 A3010 RMK AO2 SLP199 60000 T01500100 10200 20150 51014 $

TAF KSEA 300520Z 3006/3112 22008KT P6SM SCT070 SCT090 FM300900 19005KT P6SM OVC050 FM301500 21006KT P6SM BKN025 OVC035 FM301900 23005KT P6SM SCT025 OVC035 FM302100 27006KT P6SM BKN070 FM310000 01005KT P6SM SCT100 FM310300 36007KT P6SM SCT100

flight Live Traffic

flight_takeoff 353 Departures
flight_land 337 Arrivals

Recent history last 12

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-16 A9823D BFI → SEA Jul 16, 22:55 UTCJul 16, 23:55 UTC1h 0m - -
2026-07-07 A533BD BFI → SEA Jul 7, 13:35 UTCJul 7, 15:00 UTC1h 25m - -
2026-07-07 A533BD BFI → SEA Jul 7, 13:43 UTCJul 7, 14:55 UTC1h 12m +103m +22m
2026-06-30 A12B4D BFI → SEA Jun 30, 21:00 UTCJun 30, 22:00 UTC1h 0m - -
2026-06-14 A1239C BFI → SEA Jun 14, 18:15 UTCJun 14, 18:35 UTC20m - -
2026-06-14 A1239C BFI → SEA Jun 14, 18:18 UTCJun 14, 18:30 UTC12m +168m +143m
2026-06-05 A747CB BFI → SEA Jun 5, 16:50 UTCJun 5, 19:10 UTC2h 20m - -
2026-06-05 A747CB BFI → SEA Jun 5, 16:40 UTCJun 5, 18:56 UTC2h 16m +220m -2m
2026-05-18 A52C4F BFI → SEA May 18, 23:20 UTCMay 19, 01:25 UTC2h 5m - -
2026-05-18 A52C4F BFI → SEA May 18, 20:17 UTCMay 19, 01:09 UTC4h 52m +17m +186m
2026-04-24 A05DBA BFI → SEA Apr 24, 13:05 UTCApr 24, 13:35 UTC30m - -
2026-04-24 A05DBA BFI → SEA Apr 24, 13:15 UTCApr 24, 13:32 UTC17m +45m -7m

Performance history

Flights tracked
12
Avg arrival delay
+68m
On-time arrival
40% 40% on time
Aircraft used
7

Monthly activity 4 months

Month Flights tracked
July 2026 3
June 2026 5
May 2026 2
April 2026 2

UAL4212 frequently asked

Where does flight UAL4212 fly?
UAL4212 (United Airlines) flies from BFI to SEA. View the full route page.
How long is flight UAL4212?
Based on observed flights, UAL4212 takes on average 1h 27m from takeoff to landing.
How often does UAL4212 fly?
UAL4212 has been observed flying several times a week in our tracking data. We've recorded 12 flights under this callsign.
Is flight UAL4212 usually on time?
Across recent flights, UAL4212 arrives with an average 68-minute delay. 40% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL4212?
UAL4212 has been operated by 7 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL4212 live?
Yes. When UAL4212 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.