To reach San Antonio from Seaside, you will fly from Portland International Airport (PDX) to San Antonio International Airport (SAT). The distance is approximately 3,200 km. Air travel is the only practical method for this journey. You will typically connect through a hub like Dallas or Houston. The trip takes you across the country, spanning two time zones.
Total Distance: 3,200 km driving, 3,000 km air distance.
SAT is a short ride from downtown San Antonio.
Spring and Autumn offer the most pleasant weather for exploring the city's historic sites.