Edwards Mansion is located in Redlands, CA which has several different options for airports.

The closest airport would be the San Bernardino Airport located in San Bernardino, CA (15-20 minutes away from the Edwards Mansion). However, there may not be any flights that connect to this airport if you are traveling from out of state.

The next closest airport would be the Ontario International Airport located in Ontario, CA. This airport is about 30 to 40 minutes away.

The John Wayne Airport in Santa Ana, CA is about 2-2.5 hours from the Edwards Mansion.

LAX in Los Angeles, CA is 2.5-3 hours away. Tickets are generally cheaper but the traffic and the airport can be a hassle.

There's also the Long Beach Airport located in Long Beach, CA. this airport is 2-2.5 hours away from the Edwards Mansion.