Routes and flights · the DOT's airline reports, August 2025 to July 2026

Seattle-Tacoma International ⇄ Duluth International SEA–DLH

Airlines flew 1 flights between Seattle-Tacoma International SEA in Seattle, WA and Duluth International DLH in Duluth, MN in the twelve months to July 2026, both directions together: 159 passengers in 178 seats, 89% of them filled. 1,412 miles, about 185 minutes in the air, on 1 airline: Alaska Airlines Inc. (1). Planning to fly it yourself? The weather and winds along this route right now.

flights, twelve months

SEA-DLH: 1

159

passengers

89% of seats filled

1,412

miles

about 185 minutes airborne

airline

1 aircraft type

Flights by month both directions

By month, as a table

	flights
7/26	1

Passengers by month

By month, as a table

	passengers
7/26	159

The airlines twelve months, both directions

Airline	Flights	Passengers	Seats filled	Service
Alaska Airlines Inc. AS	1	159	89%	scheduled passenger service

The aircraft as the airlines report their types

Aircraft	Flights	Seats a flight	Passengers
Boeing 737-900ER	1	178	159

SEA → DLH this direction alone · flown July 2026 to July 2026

1 flights, 159 passengers in 178 seats. Alaska Airlines Inc. 1.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Duluth International DLH; all routes.