It operated scheduled service from its bases at Portland International Airport (PDX) (Pacific Northwest region) and Memphis International Airport (MEM) (Mid-South region). From 2013 to January 2016 it also operated a Southwest region from San Diego International Airport (SAN).

SeaPort Airlines used the callsign "Sasquatch" to communicate with air traffic controllers. The carrier played off this in early 2013 when it introduced "Roger, The SeaPort Airlines Sasquatch" as the airline's mascot.

As of November 2013 SeaPort Airlines received $13,879,930 in annual Federal subsidies for Essential Air Services that they provided to rural airports in the U.S.

On February 5, 2016 it was announced by the airline it had filed for voluntary Chapter 11 bankruptcy after being forced to reduce its route network. Normal day-to-day operations were set to continue during the company reorganization. The company filed a plan emerge from Chapter 11 on July 12, 2016.

As of September 20th 2016, the company is no longer in business after its Chapter 11 bankruptcy was converted to a Chapter 7 liquidation.

The Cessna 208 Caravan is a single turboprop engine aircraft.

SeaPort Airlines operated scheduled commuter service in two distinct geographical areas connecting rural communities to the national transportation network: the Pacific Northwest with destinations in Portland and Eastern Oregon Regional Airport in Pendleton, Oregon and the Mid-South including South Arkansas Regional Airport at Goodwin Field in El Dorado, Boone County Airport in Harrison, and Memorial Field Airport in Hot Springs, Arkansas as well as George Bush Intercontinental Airport (IAH) in Houston, Texas.

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