Flight
SAV airport will be the closest airport and about 20-30 mins from the city center.
Travel Note
Since both the ceremony/reception are within walking distance of each and mainly in the South Historic District, a short-term rental (Airbnb/VRBO/etc.) by Forsyth Park will be the best choice to just park and enjoy the weekend. Don't worry if you stay a few blocks away, that still works too.
Hotel
Located between Forsyth Park and River Street areas. Probably the best positioned accommodation if want downtown vibes with quick access to the south historic district as well.
Hotel
If you got it like that, definitely consider Hotel Bardo, one of Savannah’s gem. Located directly in front of Forsyth Park.