San Diego sits roughly 17 miles from the Mexican border, which means the route logic here is fundamentally different from sailing out of Los Angeles. Short Baja itineraries — typically three to four nights to Ensenada — are genuinely short because the first port is close. You are not spending a sea day getting anywhere. That proximity compresses the trip in a useful way for first-timers or anyone who wants port time without a week-long commitment, but it also means longer itineraries earn their extra nights by reaching deeper into the Riviera coast rather than simply adding buffer days.

For travelers based in Southern California, San Diego as a homeport also changes the pre- and post-cruise math. Flying into Los Angeles and busing south is straightforward, but San Diego's cruise terminal is close enough to SAN airport and downtown hotels that same-day arrivals are realistic without the anxiety of a long transfer. That practicality is most apparent on the short sailings, where a missed embarkation cannot be recovered with a port-day flight to catch the ship — the itinerary is simply too tight. Choosing San Diego over Long Beach or San Pedro is, in this context, a risk-reduction decision as much as a convenience one.