Make your way over from Pacific Beach to Half Moon Beach for a change of scenery. Delta Air Lines is offering flights from San Diego to Montego Bay, Jamaica for $408 roundtrip for travel through March.
Seats are available daily, but with a deal this good, there's scattered availability. You'll have to be flexible with travel dates. You can find fares at this price starting in late August through October and then again from January through the middle of March 2019. This books into Basic Economy, therefore no checked baggage will be included, however on Delta full sized carry-ons are still accepted.
Depending on your travel days there might be a long layover on your itinerary so take note of that while booking. As an example, I found seats departing SAN on Sunday, February 3 and returning from MBJ on Friday, February 8, 2019. You might have better luck searching in 2019 as seats during the new year seem to be more readily available.
If Jamaica isn't for you 'mon, then have a look at flight to other destinations across the globe on our San Diego (SAN) flight deals page.
Need a room near Montego Bay? Hotelwatchdog has a list of available places by the beach for the mentioned dates here.