Flight
This airport is closest to the Church, ten minutes in rush hour. Alternatively Baltimore Washington (BWI) and Dulles (IAD) are available but both an hour drive away.
Rental Car
There are on-airport and off-airport rental car brands to serve you including Alamo, Dollar, Enterprise, Hertz, National, Thrifty, Sixt (On-Airport), and Avis and Budget (Off-Airport). Further information and directions at this link: https://www.flyreagan.com/parking-transportation/rental-cars.
Rental Car
These are rental cars at Pentagon City mall and are cheaper than the ones available at the airport. The mall is accessable by either metro or uber. Yellow line metro from Reagan (DCA) two stops and then you are at the mall.
Hotel
Higher end hotel but situated right by the water in Old Town Alexandria and adjacent to King St. Walking distance from great resturants and walking distance from the Basilica of St. Mary for Sunday Mass (the oldest Catholic church in Virginia.)
Hotel
On the outskirts of Old Town, more affordable than staying in the heart of Alexandria.
Hotel
Much more affordable hotel very close to the church.