Flight
Columbia Regional Airport (COU) is the closest airport to Jefferson City -- roughly 20 minutes! However, it is a much smaller airport compared to the other two, leading to fewer options in flights and higher pricing.
Flight
Kansas City International Airport (MCI) is another airport option; there are more options for airlines and cheaper flights are available, but it does entail having to drive 2 hours to Jefferson City. If this is something that would work for you and your family, we would definitely recommend this!
Flight
Lambert International Airport (STL) in St. Louis is equal in size and distance to Jefferson City as MCI; a 2 hour drive is necessary if flying into this airport, but it definitely has more options pertaining to flights and their prices!
Hotel
Courtyard by Marriott Jefferson City is about a 6 minute drive to the reception venue and 20 minutes to St. Joseph's.
Hotel
Hampton Inn Jefferson City at Capital Mall is about an 11 minute drive from the reception venue and a 28 minute drive to St. Joseph's.