Flight
Reagan National is the most accessible airport in the area - it's just a 10-minute taxi/Uber ride away. If you're feeling particularly local, you can also take the Metro. Board at the Ronald Reagan Washington National Airport stop (attached to the airport itself) and head to Metro Center station, just three blocks from The Willard.
Flight
It's an easy trip between the BWI airport and downtown D.C. A free airport shuttle will take you across the street to the MARC/Amtrak station, where you can board a ~30 minute train into D.C. on MARC's Penn Line. You can buy and scan your ticket straight from your smartphone. You might also choose to rent a car/use a rideshare service, but expect around a 45-minute trip.
Hotel
You may book online using the direct link here or call 888-424-6835.
Discount Code - CSM
Hotel
You may book online using the direct link here or call 202-393-2000.