Flight
This is the closest international airport to St George. You will need to rent a car and drive about 2 hours into Utah.
House Or Rental
This is very close to the venue for the big day. On the property has many amenities to enjoy, pools, pickleball courts, access to cool hikes etc. There are multiple housing options if you are looking for lower cost pick a larger house and have more people stay together. Remember, all of the prices are in USD. You will want to ask for Kimber Stricker and mention you are coming in for the Barlow and D'Cunha wedding.
Travel Note
Feel free to search on Airbnb or VRBO for vacation rentals in town as it may be cheaper than a hotel and many have pools or access to pools. You are going to want to look for places that are in St George city as well as Santa Clara and Ivins as they are closer to the venue and will result in less drive time. I would advise to not secure a place in the Hurricane and Washington locations as many of those homes will make the drive to the venue 30+ minutes.