SJC/SFO -> San Diego Going to Conference in San Diego end of Aug. Thinking about flying the family down so they can hang out by the pool/beach while I'm "working". Coach Flights are $200-$250 ea, looking to see if worth using miles to fly down instead. AA/BA (Avios) can get me to LAX, but almost no availability for LAX->SAN the couple day window we want to travel. United wants 25K a ticket, which seems high. I have Chase UR Pts, but debating if would 70000 UR Points to book 4 Coach tickets... I'd rather use those for a bigger trip. Thoughts on the use of miles for short trips? Alternative is driving, but it took 13 hours the last time we drove it, and with 2 younger kids, was a LONG drive!.