Train
Amtrak and MARC (for those in the Maryland/DC area) are great train options if you don't want to drive, but are too close to fly. Penn Station serves both companies, and is conveniently located in central Baltimore.
Flight
BWI is about 20 minutes from central Baltimore by car, and is also served by the cheaper (but slower) light rail. If you're flying in, feel free to ask us about the best way to get into town depending on when you land!
Travel Note
The Circulator is a great, free way to get around Baltimore. The website has bus trackers to help you plan ahead, and the wedding is located near stops 314 (northbound) and 318 (southbound) on the Purple route.