Spokane Airport has a Main Terminal and Concourses A, B & C. Concourses A & B to the west of the main terminal share the same security checkpoint. Concourse C is to the east of the terminal. Both west and east sides of the main terminal are connected by Skybridge to the parking garage and also have individual metered parking spaces, including the center. 
The West side of the terminal houses rental car desks, baggage claims 1, 2 & 3, and ticketing desks for Concourses A & B airlines. 
The East side of the terminal houses Baggage claims 4 & 5, ticketing desks for Alaska, Frontier & Horizon, the TSA Office, a conference room, and Police & Dispatch. 

Both West and East sides of the terminal are connected by a Skybridge to the parking garage; the east, center & west sides of the terminal have also individual metered parking spaces.  
Note that WiFi access and baggage carts are free!

Concourse A serves Delta, United, United Express & US Airways with gates 11 to 15.
Concourse B serves Delta, Southwest, United, & United Express with gates 1 to 10.
Concourse C serves Alaska, Frontier & Horizon with gates 21 to 26 & on the upper level with gates 30, 31 & 32..

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