We here are my thoughts ---

If you fly from San Diego....Southwest has the most flights per day, the best prices, and the best frequent flier program. Yes, they have no FC; but they are safe, dependendable, and if you don't realize are worth more (market cap) than AA, UA, DL, NW, CO, US, AK , HP combined...$14Billion!)

BA has eliminated the NS to London.

Also, if you wanna go somewhere cool, go where Conde Naste consistently ranks the best place in the world.....Florence and Venice Italy...also Southern Italy is great...You can fly there this was way:

AA from SAN to LAX
DL/AX from LAX to MXP.

Take care!