Request a Letter of Invitation
Individuals requiring a letter of invitation to obtain travel Visas may contact OSA directly by one of the following methods:
Fax: +1 202.416.6100
Optical Society of America, Meetings Department
2010 Massachusetts Ave. NW
Washington, DC 20036
All letters of invitation will be sent electronically as a pdf file. A paper copy of a Visa invitation letter may be requested and will be sent by airmail or by fax unless a Federal Express account number or credit card number with expiration date is provided on the original request. Please allow ample time for processing requests. Requests can take 7-10 U.S. business days to process. OSA is not able to contact Embassies in support of an individual attempting to gain entry into the host country to attend an OSA meeting
The closest airport to the Hotel Palomar and the OSA Headquarters is Regan National Airport. Regan is approximately 5 miles from the Hotel Palomar and would cost approximately $10-15 in a cab. You can also take the metro from Regan to the Hotel – take the Yellow Line towards Fort Totten, transfer at Gallery Place to the Red Line towards Shady Grove and exit at DuPont Circle South. Once you exit the DuPont Circle metro, you will have a three to four block walk to the Hotel.
Another airport option is Dulles International Airport located approximately 30 miles from the Hotel Palomar. A cab will cost approximately $60 or you could use SuperShuttle as a more cost effective option. You can visit the SuperShuttle website for more information or call 1.800. 258.3826.
Visit the WMATA website for the most up to date information on the Washington, DC metro.
If you will be traveling by train, the closest Amtrak stop to the Hotel Palomar is located at Union Station in Washington, DC. Union Station is approximately 2 miles from the Hotel Palomar and should take you about 10 minutes in a cab costing you approximately $10-12.
The most up to date information can be found on the Amtrak website.
Find the most up to date information on DC weather.
Things to Do
You can find an extensive listing of things to do while in Washington, DC.