If you are flying into Los Angeles International Airport (LAX), renting a car is the best option. The drive to Montebello takes about 35-40 minutes. Uber and Lyft are also available, and the estimated cost from LAX is about $40-$50. Once in Montebello, the best way to get around is by car. Parking is widely available throughout the area, and most attractions have their own lot.
If you have extra time, consider visiting the Roosevelt Golf Course or driving 15 minutes to the Whittier Narrows Recreation Area. If you have less time, skip the San Gabriel Mission and Montebello Town Center.