AS357

SEA → BOS · Boeing 737 MAX 9 · Alaska Airlines

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For travellers

Departure · Seattle (SEA)

Gate D4

Scheduled 07:40 · Estimated 07:45 · +5 min

Board status: On-Time

Airborne since 08:04 (ADS-B)

Arrival · Boston (BOS)

Terminal B · Gate B4 · Baggage belt 3

Scheduled 16:24 · Estimated 15:41 · early

Board status: Now 3:41 PM

In the air, ~1h 56m to go (53% of the route flown)

Board data from bos, sea, updated 25 min ago; times local to each airport.

Flight

Status

In progress

Departure

Seattle Tacoma International Airport (SEA) — Seattle, United States

Scheduled departure

2026-10-02 14:40 UTC

Departed

2026-10-02 15:04 UTC

Arrival

General Edward Lawrence Logan International Airport (BOS) — Boston, United States (scheduled)

Scheduled arrival

2026-10-02 20:24 UTC

Estimated arrival

2026-10-02 19:41 UTC

Progress

53% · ~1h 56m remaining

Distance flown

2162 km

Straight-line distance

4006 km

Aircraft

Registration

N974AK

Type

Boeing 737 MAX 9

Seats

178 total (16 Business, 24 Premium Economy, 138 Economy)

CO2 (EMEP est., total)

81.2 t (812 kg/pax Business, 498 kg/pax Premium Economy, 408 kg/pax Economy)

Altitude & speed

Max altitude

35,000 ft

Max ground speed

555 kt

Tracked

2h 16m · 2,162 km

Note

still in progress - the track so far

Altitude (ft, max 35,000)

Ground speed (kt, max 555)

Altitude (ft, max 35,000)

Ground speed (kt, max 555)

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

Alaska Airlines (ASA)

Latest flights

Departed	Flight	Route	Reg	Aircraft	Status	Distance
2026-10-02 15:04 UTC	ASA357	SEA → BOS Seattle → Boston	N974AK	Boeing 737 MAX 9	In progress	~4006 km est.
2026-10-01 16:25 UTC	ASA357	SEA → BOS Seattle → Boston	N813AK	Boeing 737 MAX 8	Completed	4191 km
2026-09-30 15:06 UTC	ASA357	SEA → BOS Seattle → Boston	N586AS	Boeing 737-800	Completed	4162 km
2026-09-29 17:01 UTC	ASA357	SEA → BOS Seattle → Boston	N845AK	Boeing 737 MAX 8	Completed	4146 km

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