Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

ASA840

Operated by Alaska Airlines

Live map

Live map filtered to ASA840. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BOS KBOS VFR

Boston Logan International Airport

Boston, US

Local time
23:03 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
100° / 10 kt
Visibility
10 SM
Ceiling
BKN 10,000 ft
Temp / Dew
15°C / 12°C
Altimeter
29.68 inHg

Obs: 2026-05-30T02:54:00.000Z

Raw METAR / TAF 
METAR KBOS 300254Z 10010KT 10SM BKN100 15/12 A2968 RMK AO2 RAE09 SLP050 P0000 60000 T01500122 58018

TAF KBOS 292323Z 3000/3106 13008KT P6SM OVC070 FM300400 30013G25KT P6SM -SHRA OVC040 TEMPO 3004/3006 4SM SHRA FM300700 33013KT P6SM BKN020 FM301000 36020G32KT P6SM VCSH OVC020 FM301200 03025G44KT 3SM RA BR OVC010 FM302200 01017G28KT P6SM VCSH BKN050 FM310100 33005KT P6SM BKN130

flight Live Traffic

flight_takeoff 213 Departures
flight_land 207 Arrivals

Arrival

SEA KSEA VFR

Seattle–Tacoma International Airport

Seattle, US

Local time
20:03 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
433 ft
Coordinates
47.4479, -122.3103

cloud Weather

Wind
10° / 11 kt
Visibility
10 SM
Ceiling
SCT 5,000 ft, BKN 6,500 ft
Temp / Dew
13°C / 8°C
Altimeter
30.10 inHg

Obs: 2026-05-30T02:53:00.000Z

Raw METAR / TAF 
METAR KSEA 300253Z 01011KT 10SM SCT050 BKN065 13/08 A3010 RMK AO2 SLP200 T01330083 53008 $

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 242 Departures
flight_land 250 Arrivals

Recent history last 3

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-04-24 AA9136 BOS → SEA Apr 24, 15:35 UTCApr 24, 20:50 UTC5h 15m - -
2026-04-23 AA9C5B BOS → SEA Apr 23, 15:35 UTCApr 23, 20:45 UTC5h 10m - -
2026-04-22 AA9C5B BOS → SEA Apr 22, 15:40 UTCApr 22, 20:55 UTC5h 15m - -

Performance history

Flights tracked
3
Avg arrival delay
-
On-time arrival
-
Aircraft used
2

Monthly activity 1 month

Month Flights tracked
April 2026 3

ASA840 frequently asked

Where does flight ASA840 fly?
ASA840 (Alaska Airlines) flies from BOS to SEA. View the full route page.
How long is flight ASA840?
Based on observed flights, ASA840 takes on average 5h 13m from takeoff to landing.
How often does ASA840 fly?
ASA840 has been observed flying occasionally in our tracking data. We've recorded 3 flights under this callsign.
What aircraft operates flight ASA840?
ASA840 has been operated by 2 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track ASA840 live?
Yes. When ASA840 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.