If your flight departs from a SEA Airport Satellite Terminal at Seattle-Tacoma International Airport, knowing how to reach your gate can save you time. SEA has 2 satellite concourses: the North Satellite (Concourse N) and South Satellite (Concourse S). Both are separate from the main terminal and connected by the airport’s underground train system. The North Satellite is closely associated with Alaska Airlines, while the South Satellite serves many international carriers. Both areas have passenger facilities including restaurants, shops, and other services. This guide explains where the satellite concourses are located.
Exploring SEA Airport Satellite Terminals
Unlike airports with separate public terminals, there is one main SEA Passenger terminal with 6 concourses. The N&S concourses are satellite facilities that passengers reach after passing through security. The satellite concourses are within the secure area. You need to check in at the main terminal, pass through security, and then follow the signs for the assigned concourse.
| Seattle Airport Satellite Terminal Information | Details |
| Airport Code | SEA |
| SEA Airport North Satellite | Concourse N |
| SEA Airport South Satellite | Concourse S |
| Location | Separate from the main terminal building |
| Access | SEA Underground train system |
| North Satellite’s main airline | Alaska Airlines |
| South Satellite’s main role | Serves many international airlines |
SEA Airport North Satellite
The SEA Airport North Satellite, now officially known as Concourse N, is an important gate for Alaska Airlines. It has its own boarding gates, dining outlets, and passenger facilities. To reach the concourse, you need to follow the airport signs to the SEA underground train and take the north loop towards the N. The official map shows gates numbered N1 through N 20. The SEA Airport North Satellite underwent major modernization, including expansion that added gates and increased dining and retail space.
Facilities available include:
- Alaska Lounge on the upper level
- Restaurants, cafés, and food outlets
- Retail shops
- Restrooms and water refill stations
- Nursing room and accessibility facilities
- Pet relief area near the N train station
- Alaska Airlines customer service
SEA Airport South Satellite
The SEA Airport South satellite, also known as Concourse S, is a major international departure area at SEA Airport. Many overseas airlines operate from this concourse, making it an important location for passengers traveling to destinations across Europe, Asia, and other regions.
You can reach SEA Airport South Satellite terminal Concourse S using the South Loop of the SEA underground train system. If you arrive internationally, the Seattle Airport South Satellite connects to the International Arrivals Facility via a dedicated elevated walkway.
Facilities available include:
- International airline boarding gates
- Restaurants and cafés
- Retail outlets
- Restrooms and water refill facilities
- Passenger seating and charging facilities
- The Club at SEA and other airline lounge options, subject to current operations and access rules
- Pet relief area near the S train station
SEA Airport Satellite Terminal Gates
The 2 satellite concourses have separate gate numbering systems. Your airline and destination determine the gate assigned to your flight, so use the table here as a general reference.
| Satellite Concourse | Gate Numbers | Main Purpose |
| North Satellite (N) | N1–N20 | Primarily Alaska Airlines flights |
| South Satellite (S) | S-numbered gates, including S1–S12 and S15–S16 on the published map | Many international departures and arrivals |
Airlines operating from SEA airport satellite terminals
The 2 SEA Airport Satellite Terminal concourses serve different groups of airlines. Alaska Airlines is the primary carrier at the North Satellite, while the South Satellite serves many International Airlines.
| Airline | Satellite Concourse Information |
| Alaska Airlines | North Satellite (N), as well as C and D |
| Aer Lingus | South Satellite (S) |
| Aeromexico | South Satellite (S) |
| Air Canada | South Satellite (S) |
| Air France | South Satellite (S) |
| ANA (All Nippon Airways) | South Satellite (S) |
| Asiana Airlines | South Satellite (S) |
| British Airways | South Satellite (S) |
| Cathay Pacific | South Satellite (S) |
| China Airlines | South Satellite (S) |
| Condor | South Satellite (S) |
| Emirates | South Satellite (S) |
| EVA Air | South Satellite (S) |
| Finnair | South Satellite (S) |
| Hawaiian Airlines | South Satellite (S) |
| Icelandair | South Satellite (S) |
| Japan Airlines | South Satellite (S) |
| Korean Air | South Satellite (S) |
| Lufthansa | South Satellite (S) |
| Philippine Airlines | South Satellite (S) |
| Singapore Airlines | South Satellite (S) |
| Turkish Airlines | South Satellite (S) |
| Virgin Atlantic | South Satellite (S) |
How to get between the main terminal and SEA satellite terminals?
The underground system connects the SEA Airport Satellite Terminal with the main concourses. The system has 3 routes. Follow the airport signs to the correct train station and line. If the train service is interrupted for maintenance or other operational reasons, SEA might use buses to transport passengers.
- South Loop (Blue Line): Connects Concourse A, Concourse B, and Concourse S.
- North Loop (Green Line): Connects Concourse C, Concourse D, and Concourse N.
- Shuttle (Yellow Line): Connects the north and south train systems through the A and D concourse areas.
SEA Airport’s North and South satellite terminals make it easier to manage domestic and international departures through dedicated gate areas, passenger facilities, and underground train connections. Before heading to your gate, check your boarding pass for the correct concourse and review the available map for dining and other services.
Know More About SEA Airport Satellite Terminals
How many satellite terminals does SEA have?
SEA has 2 satellite concourses: the North Satellite and the South Satellite.
How do I get to the north satellite at SEA airport?
After security, you need to follow the signs for the SEA underground train and take the North Loop to N Gates.
Which airlines use the South satellite at SEA airport?
Many international airlines use concourses, including Air Canada, British Airways, Emirates, Lufthansa, Singapore Airlines, and Turkish Airlines.
Does the SEA airport satellite terminal have restaurants and shops?
Yes, both satellite concourses have dining and retail options. The exact businesses and opening hours might vary, so check the current airport map for details.
Can I walk to the satellite terminals from the main terminal?
The N&S satellite concourses are separate from the main terminal and are normally reached using the SEA underground train system.