LAX prices for business class are much better than San Diego prices. We drove up to LAX this past April, 2024, because prices were so high here.
We like British Airways new business class. We prefer to get over the pond on the first flight, on the red-eye option. Also, there's a better chance of sleeping if you have a flight that doesn't have a US connection, so you have 9-10 hours to relax.
We have been flying business class for years, and have paid between $1700 to $3000 each RT. We got lucky this past spring and paid $1850 each RT LAX to Amsterdam, British Airways. We purchased our tickets the summer before. There's no system, it's a crap shoot. I just Searched everyday for a month.
Look at Google Flights to compare prices. You can set up price alerts , price history, and look at an entire month to see how prices vary by day. You can also Search , for example, from LAX to Europe, for a certain date, and see the price for a variety of cities. Always book directly with the airlines, do not used third -party vendors, such as Expedia, etc
We used the AARP discount, stacked with the British Airways visa 10% discount . You have enough time to open a new credit card and earn signing bonuses for many airlines.
Good luck to us all. We are now starting to look for next spring. It's early yet, but I'd like to have flights by September, so I can have my choice of hotels. If there's no big fare sales, I'd say $2500 each RT from LAX is reasonable. By reasonable, I mean the chances of getting much lower could be slim. Many airlines still have a free change policy for business class. So if the prices go down after you purchase , you could rebook at the cheaper price.
Good luck!