Flight
For those flying in, the airport is only 10-15 minutes from town. It is easy to rent a car, catch an Uber into town, or you can check out this website for taking public transportation.
Travel Note
There are numerous hotels, motels, and AirBnBs in the SLC area. Booking a place near the mountains in Cottonwood Heights would make you closer to the ceremony and somewhere closer to downtown will be near the reception.