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
18:09 PDT
Timezone
America/Los_Angeles
Type
Medium Airport
Elevation
21 ft
Coordinates
47.5270, -122.2999

cloud Weather

Wind
VRB / 3 kt
Visibility
10 SM
Ceiling
BKN 5,500 ft, OVC 7,000 ft
Temp / Dew
14°C / 8°C
Altimeter
30.08 inHg

Obs: 2026-05-30T00:53:00.000Z

Raw METAR / TAF 
METAR KBFI 300053Z VRB03KT 10SM BKN055 OVC070 14/08 A3008 RMK AO2 SLP186 T01440083

TAF KBFI 292339Z 3000/3024 04005KT P6SM FEW020 BKN035 FM300300 02009KT P6SM BKN050 FM301200 13005KT P6SM BKN030 FM301900 28005KT P6SM BKN080

flight Live Traffic

flight_takeoff 20 Departures
flight_land 21 Arrivals

Arrival

SEA KSEA VFR

Seattle–Tacoma International Airport

Seattle, US

Local time
18:09 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
30° / 10 kt
Visibility
10 SM
Ceiling
FEW 5,000 ft, BKN 7,000 ft
Temp / Dew
14°C / 8°C
Altimeter
30.08 inHg

Obs: 2026-05-30T00:53:00.000Z

Raw METAR / TAF 
METAR KSEA 300053Z 03010KT 10SM FEW050 BKN070 14/08 A3008 RMK AO2 SLP192 T01440083 $

TAF KSEA 292339Z 3000/3106 03005KT P6SM FEW020 BKN035 FM300300 03010KT P6SM BKN050 FM301200 10005KT P6SM BKN030 FM301900 28006KT P6SM BKN070

flight Live Traffic

flight_takeoff 249 Departures
flight_land 289 Arrivals

Recent history last 4

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
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
4
Avg arrival delay
+90m
On-time arrival
50% 50% on time
Aircraft used
2

Monthly activity 2 months

Month Flights tracked
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 56m from takeoff to landing.
How often does UAL4212 fly?
UAL4212 has been observed flying occasionally in our tracking data. We've recorded 4 flights under this callsign.
Is flight UAL4212 usually on time?
Across recent flights, UAL4212 arrives with an average 90-minute delay. 50% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL4212?
UAL4212 has been operated by 2 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.