For wedding guests visiting from outside of California, these are the airports closest to the wedding venue.
Los Angeles Airport
LAX is approximately 133 miles from the Ritz Carlton Rancho Mirage. Depending on traffic that could calculate to a two and a half hour drive.
John Wayne Airport
SNA is approximately 104 miles from the Ritz Carlton Rancho Mirage. Depending on traffic the drive could be an hour and a half to two hours.
Palm Springs International Airport
PSP is around 7 miles from the Ritz Carlton Rancho Mirage. It is an estimated 18 minute drive. While it is a smaller airport they do have flight options depending on where you are located and what airline you would like to fly.
For those interested in other options, AirBnB and VRBO have an excellent variety of places to stay, with a wide range of budgetary options.