Sacramento International (SMF): The Complete Layover Guide

Sacramento International sits in farmland about 11 miles northwest of downtown, and it might be the lowest stress major airport in California: two terminals, short walks, and security lines that rarely test your patience.

Terminal A is the legacy carrier building. Air Canada, American, Delta and United board from its gates. Terminal B, opened in 2011, is the bigger and newer of the pair and serves Southwest, the dominant airline here, alongside Aeromexico, Alaska, Frontier, Hawaiian, JetBlue and Volaris. If you are flying Southwest, you are in B. Almost everyone else flying a major legacy carrier is in A.

The two terminals do not connect airside. They stand on either side of a parking garage, linked landside by a pedestrian walkway across that garage: leave from level 2 of Terminal A or level 3 of Terminal B and the walk takes about 7 minutes. A free shuttle also loops between the terminal curbs roughly every 10 minutes if you would rather ride. Either way, you clear TSA again in your departure terminal, because there is no sterile path between the buildings.

Terminal B has one extra wrinkle worth knowing: the check in hall and the gate concourse are separate buildings joined by an automated tram. The ride itself is quick, but it adds a few minutes each way, so do not cut a Terminal B departure as fine as the small airport vibe tempts you to.

Connection timing honesty: if both flights leave from the same terminal, 45 minutes on a single ticket is comfortable here. If your connection switches terminals, you are exiting security, walking the garage, and rescreening, so treat it as a 75 to 90 minute job, more on a Monday morning when the checkpoints back up. Cross terminal connections are rare at SMF in practice, since Southwest connects within B, but mixed ticket itineraries do produce them.

Getting downtown is cheap and quick. SacRT runs the route 142 Airport Express bus between the terminals and downtown Sacramento for $2.50, taking about 20 minutes, with departures roughly every 20 to 30 minutes from early morning until the last run around 10:30 pm. Yolobus route 42 also calls at the airport on its loop toward West Sacramento, Davis and Woodland. A taxi or ride hail covers the same trip in 20 to 25 minutes; expect roughly $25 to $40 by app, and taxi flat rates of about $35, to be confirmed at the curb. With 5 or more hours you can genuinely see the Capitol or Old Sacramento and make it back with margin.

Overnight, the terminals stay open 24 hours but the security checkpoints do not. Screening shuts down after the last departures, typically after midnight, and reopens around 4 am, so anyone staying the night waits landside. Sacramento tolerates overnight travelers, which is more than many airports this size can say.