Flight
San Diego (SAN) is the closest airport, clocking in at about 34 miles (35-60 mins) distance from the church where the ceremony will be held. We love Google Flights to find cheap round-trip flight options, but Southwest Airlines also has great prices flying into SAN and doesn't charge you for bags!
Hotel
You're in luck because there are many affordable hotels nearby. For large groups or families, we recommend checking Six Suitcases Travel at the link below! There you can find recommendations for affordable hotel booking for large families.
House Or Rental
There are tons of gorgeous Air-bnb rental options available in the Vista / Carlsbad / San Marcos / Oceanside areas right near Saint Elizabeth's, where the ceremony will be held. Javi and I both live in Escondido (Just southeast of Carlsbad), where you can find cheaper lodging, but be aware that some of the neighborhoods in Escondido aren't as luxurious.
Travel Note
Don't forget that San Diego is a desert climate! In November, Carlsbad will just be beginning to cool down from its summer heat. The days will be mild and warm but the Fall breeze may be beginning to pick up. Days may be in the 60's-70's with possible highs of 80, and nights may see temperatures as low as 45. Depending on where you're from, this could be extraordinarily cold or hot for you, so keep that in mind while packing!