Apparatus

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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
01:41 PDT
Timezone
America/Los_Angeles
Type
Medium Airport
Elevation
21 ft
Coordinates
47.5270, -122.2999

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
18°C / 7°C
Altimeter
30.05 inHg

Obs: 2026-07-14T07:53:00.000Z

Raw METAR / TAF 
METAR KBFI 140753Z 00000KT 10SM CLR 18/07 A3005 RMK AO2 SLP177 T01780067 402560128

TAF KBFI 140520Z 1406/1506 34005KT P6SM FEW250 FM140800 VRB03KT P6SM SKC FM141700 33007KT P6SM SKC

flight Live Traffic

flight_takeoff 15 Departures
flight_land 13 Arrivals

Arrival

SEA KSEA VFR

Seattle–Tacoma International Airport

Seattle, US

Local time
01:41 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
340° / 7 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
16°C / 6°C
Altimeter
30.06 inHg

Obs: 2026-07-14T07:53:00.000Z

Raw METAR / TAF 
METAR KSEA 140753Z 34007KT 10SM CLR 16/06 A3006 RMK AO2 SLP184 T01560061 402670117 $

TAF KSEA 140520Z 1406/1512 35007KT P6SM FEW250 FM140800 01004KT P6SM SKC FM141400 34006KT P6SM SKC FM141900 31007KT P6SM SKC FM150300 34006KT P6SM SKC

flight Live Traffic

flight_takeoff 548 Departures
flight_land 420 Arrivals

Recent history last 11

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
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
11
Avg arrival delay
+68m
On-time arrival
40% 40% on time
Aircraft used
6

Monthly activity 4 months

Month Flights tracked
July 2026 2
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 30m 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 11 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 6 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.