Terminals & gates at SEA
Seattle, Washington
Terminal layout at SEA
Seattle Tacoma International Airport is organized into 5 terminals. Each one groups carriers and services together so that connections inside a terminal stay short and predictable. Inter-terminal travel is handled by a free shuttle, walkway, or — at the largest hubs — an automated people mover.
The terminal layout below reflects the standard configuration for SEA. Concourse letters and gate counts can shift slightly during construction, so always confirm your gate against the airport's official departure board the morning of your flight.
Terminal A · 46 gates
Terminal A is one of the primary departure halls at SEA. It holds approximately 46 active gates and a full slate of pre- and post-security amenities. Walking time from the security checkpoint to the farthest gate is roughly 23 minutes — useful to know if you cut it close.
Airlines based here
On-site amenities
- Pet relief area
- Wellness rooms with massage chairs
- CLEAR enrollment
- Currency exchange
- Duty-free shopping
Terminal B · 41 gates
Terminal B is one of the primary departure halls at SEA. It holds approximately 41 active gates and a full slate of pre- and post-security amenities. Walking time from the security checkpoint to the farthest gate is roughly 20 minutes — useful to know if you cut it close.
Airlines based here
On-site amenities
- Sit-down dining concourse
- Currency exchange
- TSA PreCheck lanes
- Wellness rooms with massage chairs
- Family restrooms and nursing rooms
Terminal C · 37 gates
Terminal C is one of the primary departure halls at SEA. It holds approximately 37 active gates and a full slate of pre- and post-security amenities. Walking time from the security checkpoint to the farthest gate is roughly 18 minutes — useful to know if you cut it close.
Airlines based here
On-site amenities
- International arrivals hall
- USB and AC charging at every gate
- Self-bag-drop kiosks
- Duty-free shopping
- Wellness rooms with massage chairs
Terminal D · 32 gates
Terminal D is one of the primary departure halls at SEA. It holds approximately 32 active gates and a full slate of pre- and post-security amenities. Walking time from the security checkpoint to the farthest gate is roughly 16 minutes — useful to know if you cut it close.
Airlines based here
On-site amenities
- Family restrooms and nursing rooms
- TSA PreCheck lanes
- USB and AC charging at every gate
- International arrivals hall
- Duty-free shopping
Terminal E · 28 gates
Terminal E is one of the primary departure halls at SEA. It holds approximately 28 active gates and a full slate of pre- and post-security amenities. Walking time from the security checkpoint to the farthest gate is roughly 14 minutes — useful to know if you cut it close.
Airlines based here
On-site amenities
- Self-bag-drop kiosks
- Interfaith chapel
- Duty-free shopping
- Children's play area
- Sit-down dining concourse
Connecting between terminals
If your itinerary routes you between terminals at SEA, give yourself extra time. Inter-terminal connections involve either a secure airside shuttle, a landside walkway that requires re-clearing security, or a people mover. Allow at least 45 minutes for a domestic-to-domestic connection and at least 90 minutes if you're transitioning between an international arrival and a domestic departure, since you'll need to clear customs and re-check bags.
Signage inside the terminal will direct you to the connection point. Look for "Inter-Terminal Transit" or the airport's branded shuttle name. Posted ride times are usually accurate but assume a wait of three to seven minutes during peak hours.