Alaska Airlines· Callsign ASA348

AS348 from Seattle to Washington, tracked live

Alaska Airlines's domestic Seattle-Washington service, 3,701 km east - tracked live here.

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Status on this page means observed ADS-B activity inside available receiver coverage. Confirm official delay, cancellation, gate and booking status with Alaska Airlines.

SEA
Seattle
Seattle - Tacoma International Airport
3,701 km · 2,300 mi
Non-stop
IAD
Washington
Washington Dulles International Airport
Aircraft
Boeing 737-900ER
typical equipment
Distance
3,701 km
1,998 nautical miles
Heading
88°
tracks east
Clock change
+3 h
on arrival
Range used
68%
of the type's book range
Length rank
#244
of 383 tracked routes

Follow AS348 in real time

The aircraft appears below whenever it is airborne and inside receiver coverage. Its planned route is drawn between the two airports.

AS348 is not transmitting right now. It may be between rotations, on the ground, or out of receiver range - Check back near departure time. The full map has the rest of the sky, and what is flying over me will name whatever is above you instead.

AS348 at a glance

  • The trip: 3,701 km (2,300 miles) from Seattle to Washington, flying east.
  • How long: no published block time for this service yet.
  • Your watch: set it 3 hours forward on arrival.
  • Window seat tip: the right (south-facing) side gets the sun on a daytime flight.
  • The plane: usually a Boeing 737-900ER. This route uses about 68% of how far it can fly.

AS348 route overview: SEA to IAD

AS348 distance and great-circle path

AS348 covers 3,701 km, or 2,300 miles. That makes it a medium-haul flight, long enough for a full meal service, short enough for narrowbodies. Of the 383 routes we track, it ranks 244 by distance.

Both ends of this route are in United States. It is 3,701 km of domestic flying east, from Seattle to Washington. Watches move 3 hours forward between the two gates.

Our guide explains how the SEA-IAD route appears on a tracker map.

Can the Boeing 737-900ER comfortably fly AS348?

Not really. It uses about 68% of the Boeing 737-900ER's range. That leaves room for a full load of passengers and bags. The full numbers are on our aircraft page for the Boeing 737-900ER.

What to know about AS348

  • Time change: you land 3 hours ahead of the time you left.

What we know about AS348

What flying SEA to IAD takes

It is a medium-haul sector, long enough for a full meal service, short enough for narrowbodies. Alaska Airlines needs a narrowbody on the longer variants, or a widebody where demand justifies it: at this distance the choice is usually about seat count rather than range. Eastbound, the jet stream is usually a tailwind, so the return leg against it tends to be the longer of the two. In daylight the sun sits on the right (south-facing) side of the cabin for most of the crossing.

How we verified this

The origin and destination on this page are the ones we verified for callsign ASA348 through adsbdb, not a schedule copied from elsewhere. We have logged it airborne on 32 days between 2026-09-20 and 2026-10-21. Timings are observations, not an official operational status: always confirm with the airline before travelling.

This page was published from our own tracking record rather than a third-party schedule feed, so it grows as we see the flight again. The seven-day log below is the raw version of the same evidence.

AS348 activity in the past 7 days

Our database contains 7 observations of AS348 across 7 UTC dates in this window, most recently 2026-10-21. Those records contain 7 distinct transponder addresses. The most frequently resolved route was SEA-IAD (7 records).

The median recorded visibility was 309 minutes. That is time inside receiver coverage, not airborne duration or an on-time-performance measurement.

Date (UTC)RouteFirst trackedLast trackedTracked for
2026-10-21 SEA → IAD 13:07 UTC 18:16 UTC 5h 9m
2026-10-20 SEA → IAD 12:59 UTC 18:08 UTC 5h 9m
2026-10-19 SEA → IAD 13:06 UTC 18:11 UTC 5h 5m
2026-10-18 SEA → IAD 13:09 UTC 18:13 UTC 5h 3m
2026-10-17 SEA → IAD 13:04 UTC 18:16 UTC 5h 12m
2026-10-16 SEA → IAD 13:02 UTC 18:26 UTC 5h 24m
2026-10-15 SEA → IAD 13:07 UTC 18:14 UTC 5h 8m

“First/last tracked” are when AS348 entered and left receiver coverage, in UTC.

Airports and aircraft on AS348

Every scheduled service we follow is listed in the tracker directory, including Alaska Airlines and other tracked flights grouped by airline.

SEA Seattle - Tacoma International Airport Seattle, United States · live radar →
IAD Washington Dulles International Airport Washington, United States · live radar →
B739 Boeing 737-900ER Typical equipment · specs →

How much CO2 does AS348 emit?

Worked from the great-circle distance and the fuel burn measured for Boeing 737-900ER, the aircraft normally flying this route. Carbon dioxide only - see the method below.

Distance flown3,701 km
AircraftBoeing 737-900ER
Fuel burn rate3.83 kg per km
Fuel burned14,171 kg
CO2, whole flight44.8 tonnes
Seats, typical layout178
Passengers carried148 at an 83% load factor
CO2 per passenger303 kg

Where that lands by cabin

The aircraft burns the same fuel whoever is aboard, so the cabins divide one total rather than each carrying their own. A seat's share is the floor it takes up, which is why an economy seat comes out below the 303 kg cabin average and a flat bed well above it.

Economy157 seats, 130 flown
250 kg CO2 per seat
Business21 seats, 17 flown
724 kg CO2 per seat

Taken whole, AS348 emits what 746 trees take back out of the air in a year. One economy seat on it accounts for about the same carbon dioxide as driving a petrol car 1,780 km, or 8,645 km of the same journey by train.

How this is worked out. Fuel burn is read from published measurements of this type, taken at a 926 km sector, the only published sector for this type, applied to this route's 3,701 km unadjusted. It counts carbon dioxide only, and the cabin split assumes the layout typical of this size of aircraft. Read the full method, sources and caveats, or put AS348 against another flight.

Other tracked flights from Seattle

FlightRouteTypical aircraft
DL2943Seattle (SEA) → San Francisco (SFO) DL2943 flight tracker →
DL2680Seattle (SEA) → San Francisco (SFO) DL2680 flight tracker →
AS100Anchorage (ANC) → Seattle (SEA) Boeing 787-9 DreamlinerAS100 flight tracker →
AS65Seattle (SEA) → Ketchikan (KTN) → Wrangell (WRG) → Petersburg (PSG) → Juneau (JNU) Boeing 737-800AS65 flight tracker →
AS7Seattle (SEA) → Tokyo (NRT) Boeing 787-9AS7 flight tracker →
AS1Seattle (SEA) → Anchorage (ANC) Boeing 737-900ERAS1 flight tracker →

Guides relevant to AS348

Chosen from this route's distance, timing, aircraft, airline and airports.

How airlines plan routes This medium-haul sector shows how aircraft size and local demand shape a network.
Boeing versus Airbus The typical aircraft is built by Boeing; these visual clues help identify it.
Airline alliances explained Alaska Airlines belongs to oneworld, which affects connections and codeshares.

Data sources and review

Reviewed 2026-07-29 by Flight-Tracker.net Editorial Team

The route and typical schedule are maintained reference data. Live ADS-B observations are evidence of receiver coverage, not proof of on-time performance. Always confirm the operating date and times with the airline.

Read our schedule and observation review process, or inspect the machine-readable reference dataset.

Put AS348 on your own site

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AS348 frequently asked questions

How long is the AS348 flight?

Seattle to Washington is 3,701 km (2,300 miles) in a straight line. Actual airborne time varies with winds, routing and holding.

What aircraft operates AS348?

Typically a Boeing 737-900ER (full specifications), using roughly 68% of that type's published range.

Does AS348 fly every day?

Frequency varies by season. Always confirm with the airline before travelling.

Can I track AS348 live?

Yes. Whenever AS348 is airborne and in receiver coverage the map above follows it live, with altitude, ground speed and heading. Between rotations, the seven-day log above shows where it has been.

More Alaska Airlines flights to watch

FlightRouteTypical aircraft
AS100 Anchorage (ANC) → Seattle (SEA) Boeing 787-9 Dreamliner AS100 flight tracker →
AS65 Seattle (SEA) → Ketchikan (KTN) → Wrangell (WRG) → Petersburg (PSG) → Juneau (JNU) Boeing 737-800 AS65 flight tracker →
AS7 Seattle (SEA) → Tokyo (NRT) Boeing 787-9 AS7 flight tracker →
AS1 Seattle (SEA) → Anchorage (ANC) Boeing 737-900ER AS1 flight tracker →
AS11 New York (JFK) → Los Angeles (LAX) Boeing 737-900ER AS11 flight tracker →
AS830 Seattle (SEA) → Honolulu (HNL) Boeing 737-900ER AS830 flight tracker →