Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL3821

Live map

Live map filtered to UAL3821. Shown when the flight is currently airborne.

Route airports View route page →

Departure

PDX KPDX VFR

Portland International Airport

Portland, US

Local time
16:06 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
31 ft
Coordinates
45.5887, -122.5980

cloud Weather

Wind
320° / 4 kt
Visibility
10 SM
Ceiling
FEW 4,500 ft
Temp / Dew
24°C / 9°C
Altimeter
30.00 inHg

Obs: 2026-08-28T22:53:00.000Z

Raw METAR / TAF 
METAR KPDX 282253Z 32004KT 10SM FEW045 24/09 A3000 RMK AO2 SLP156 T02440094 $

TAF KPDX 282059Z 2821/2918 31010KT P6SM FEW045 SCT250 FM290800 VRB04KT P6SM SCT050 FM291200 21005KT P6SM VCSH BKN040

flight Live Traffic

flight_takeoff 94 Departures
flight_land 90 Arrivals

Arrival

BFI KBFI VFR

King County International Airport - Boeing Field

Seattle, US

Local time
16:06 PDT
Timezone
America/Los_Angeles
Type
Medium Airport
Elevation
21 ft
Coordinates
47.5270, -122.2999

cloud Weather

Wind
230° / 7 kt
Visibility
10 SM
Ceiling
BKN 6,000 ft
Temp / Dew
23°C / 11°C
Altimeter
30.00 inHg

Obs: 2026-08-28T22:53:00.000Z

Raw METAR / TAF 
METAR KBFI 282253Z 23007KT 180V260 10SM BKN060 23/11 A3000 RMK AO2 SLP159 T02330111

TAF KBFI 282034Z 2821/2918 VRB04KT P6SM SCT025 BKN035 FM290400 31005KT P6SM BKN050 FM290800 12003KT P6SM -SHRA OVC030 FM291200 17005KT P6SM -SHRA OVC015

flight Live Traffic

flight_takeoff 24 Departures
flight_land 31 Arrivals

Recent history last 5

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-07 A12B4D PDX → BFI Jul 7, 20:40 UTCJul 7, 21:28 UTC48m +40m +59m
2026-07-07 A12B4D PDX → BFI Jul 7, 20:30 UTCJul 7, 21:05 UTC35m - -
2026-06-02 AC0831 SEA → PAE Jun 2, 20:40 UTCJun 2, 21:10 UTC30m - -
2026-05-14 AA79A6 SEA → PAE May 14, 22:03 UTCMay 14, 23:56 UTC1h 53m +23m +7m
2026-05-14 AA79A6 SEA → PAE May 14, 22:15 UTCMay 14, 23:30 UTC1h 15m - -

Performance history

Flights tracked
5
Avg arrival delay
+33m
On-time arrival
50% 50% on time
Aircraft used
3

Monthly activity 3 months

Month Flights tracked
July 2026 2
June 2026 1
May 2026 2

UAL3821 frequently asked

Where does flight UAL3821 fly?
UAL3821 flies from PDX to BFI. View the full route page.
How long is flight UAL3821?
Based on observed flights, UAL3821 takes on average 1h 0m from takeoff to landing.
How often does UAL3821 fly?
UAL3821 has been observed flying occasionally in our tracking data. We've recorded 5 flights under this callsign.
Is flight UAL3821 usually on time?
Across recent flights, UAL3821 arrives with an average 33-minute delay. 50% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL3821?
UAL3821 has been operated by 3 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL3821 live?
Yes. When UAL3821 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.