[occitan]

I live in SF and can get door-to-door to a friend's house in San Diego in 3 hours.

Assuming both you and your friend live in the actual, respective airport terminals.

Otherwise, your numbers just don't jibe with the reality of typical fight and check-in times (let alone the time cost of, you know, actually getting to and from the airport).

[kelnos]

Don't know what to tell you; I've done it plenty of times.

15 mins to the airport (I live close to a freeway entrance), 10 mins to the gate, 40 min wait time till takeoff, 90 mins in the air, 10 mins out to the curb, 15 mins to my friend's house near Hillcrest.

Sure, if I'm traveling at the height of rush hour, the car trips to and from the airport will be longer, but the solution is to... not do that.

[danenania]

Well done on your optimized flight routine, but a true 200 MPH+ bullet train from SF to SD wouldn't take much longer.

Cross-country express trips could be done in less than a day.