Reaching DoubleTree Hotel from BWI Airport:
To utilize DoubleTree by Hilton Baltimore Airport (BWI) Hotel shuttle service, please call 410-859-8400 and wait at off-site hotel shuttle services bay, which are located near Door no:1/Door no:15. Please ask the BWI-Airport help desk for more assistance.

From Washington Dulles Airport (IAD) to DoubleTree Hotel:

There are Shared Shuttles and Taxis available from Washington Dulles Airport (IAD) to DoubleTree Hotel, BWI Baltimore. The Taxi can be booked at the ground lower ground level after crossing the custom exist. Taxi costs around $150 and shared shuttle costs $72. Both the services are available every 10 minutes and it will be 1-hour drive to DoubleTree by Hilton, Baltimore Airport.

Or

Metrorail is also available from IAD to the Greenbelt Metrorail station on the Green Line. B30 Metrobus to the BWI Airport charges $7.50 per person. The attached B30 schedule informs the departure of bus from Greenbelt Metrorail station. Then free shuttle is available from BWI Airport to DoubleTree Hotel.

Taxi is preferable to travel directly from Washington Dulles Airport (IAD) to DoubleTree Hotel, if you are traveling first time to Baltimore.

Contact:
You can contact Dr. Suds Yakkanti (Vice-President of USG) @ +1 469-353-1156 for any onsite concerns during the conference days. If you wish to contact the hotel reception, please mention the organizer "United Scientific Group" along with the conference name.

For more information from the hotel: https://doubletree3.hilton.com/en/hotels/maryland/doubletree-by-hilton-hotel-baltimore-bwi-airport-BWIBADT/index.html