FlyerInHI: This isn’t much worse than transportation from NJ suburbs of NYC to Newark Airport. If you live on the train line that serves the Airport station, you can just get off there and take the monorail. Easy.
But if you’re taking a different line, you need to get off at another station in Newark, take the subway to Penn Station, then take a bus to the airport. Makes San Diego look like child’s play.
In the US, only DC (with National Airport), Philly, and Chicago get it right by running frequent direct trains to their airports.
AN: the north coast cities are both cities and suburbs. Call them “streetcar” or railroad suburbs, but the traffic flow in the morning is still primarily to the south and San Diego. It’s an older model of suburbanization, but still suburban.
Encinitas is population 60,000 give or take. Suburbs/cities outside of NYC like New Rochelle can be similar in size (say 80,000).