Flight
Monterey Airport is a regional airport convenient for those traveling from SoCal/Phoenix and some East Coast locations. Renting a car is recommended, though not necessary as there is public transportation around the Monterey Peninsula. A ride will need to be coordinated to and from the wedding venue.
Flight
SJC is the closest international airport, with multiple airlines flying in. The location is an hour away from Carmel - you will need to make additional transportation plans.