Dulles Airport (IAD) is the closest airport to the venue; about 10 minutes. You can also fly into Reagan National Airport (DCA) but this one is about 45 minutes away.
There will be shuttles on the wedding day only. Ubers are available in eastern Loudoun County (where the wedding is) but if you go west for an activity, Ubers stop servicing the further you go. If you would like to do any activities on the wedding weekend and you are coming from out of town, we suggest car rental. Turo is a great option with affordable cars and you can pick them up contactless from the airport.