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
12:03 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
31 ft
Coordinates
45.5887, -122.5980

cloud Weather

Wind
290° / 5 kt
Visibility
10 SM
Ceiling
FEW 20,000 ft, FEW 25,000 ft
Temp / Dew
24°C / 9°C
Altimeter
30.07 inHg

Obs: 2026-07-14T18:53:00.000Z

Raw METAR / TAF 
METAR KPDX 141853Z 29005KT 10SM FEW200 FEW250 24/09 A3007 RMK AO2 SLP183 T02440094 $

TAF KPDX 141720Z 1418/1518 27003KT P6SM FEW200 SCT250 FM150200 34007KT P6SM SKC FM150800 VRB04KT P6SM SCT200

flight Live Traffic

flight_takeoff 185 Departures
flight_land 162 Arrivals

Arrival

BFI KBFI VFR

King County International Airport - Boeing Field

Seattle, US

Local time
12:03 PDT
Timezone
America/Los_Angeles
Type
Medium Airport
Elevation
21 ft
Coordinates
47.5270, -122.2999

cloud Weather

Wind
VRB / 5 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
23°C / 9°C
Altimeter
30.09 inHg

Obs: 2026-07-14T18:53:00.000Z

Raw METAR / TAF 
METAR KBFI 141853Z VRB05KT 10SM CLR 23/09 A3009 RMK AO2 SLP188 T02330089

TAF KBFI 141720Z 1418/1518 32002KT P6SM SKC FM141900 31007KT P6SM SKC FM150500 32002KT P6SM BKN120 FM151200 VRB02KT P6SM FEW250

flight Live Traffic

flight_takeoff 26 Departures
flight_land 23 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.