What to know
SEA official airline directory lists Frontier at SEA. Terminal operations can move during construction, irregular operations, or seasonal schedule changes.
Airport layout
Seattle-Tacoma International Airport uses Main Terminal as its primary passenger-processing area. Follow the concourse or gate shown on the day-of-travel boarding pass.
Getting to the gate
Choose the SEA terminal shown by the operating airline, then confirm the check-in zone before curbside drop-off. Allow extra time when the gate is in a different concourse.
Connections
Connection paths at SEA depend on the concourse pair and current security controls. Follow airport signs and ask the operating airline before leaving the secure area.
