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Plan Your Trip to ONS Congress

We can’t wait to see you in Washington, DC!

United States capitol building with blue sky and cherry blossoms in the foreground

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Night time photo of lit, glass window building

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Conference Location

The Walter E. Washington Convention Center is located in the heart of the U.S. capital. ONS Congress is the perfect place to get out and have some fun—visit the U.S. Capitol, stroll the National Mall, explore 17 Smithsonian Museums, and more.

Walter E. Washington Convention Center  
801 Allen Y. Lew Place NW 
Washington, DC 20001

Housing for ONS Congress 2024 is now closed. 

All reservations have been transferred to the hotels. Please contact the hotels directly to make any new reservations, changes, or cancellations starting on April 3, 2024.

If you still need to make a reservation, this third-party link will show you current availability.

**PLEASE NOTE: This third-party site offers available hotels that may have room rates, deposits and/or cancel policies that differ from the ONS contracted hotels. Reservations will be made through a 3rd party travel agent, therefore, any questions regarding hotel policies or payments should be directed to the travel agent or the hotel directly. Any changes or cancellations to reservations booked through aRes must be made directly with the hotel.**

Headquarter Hotel

Marriott Marquis Washington, DC  


901 Massachusetts Avenue, NW
Washington, DC 20001-4307  
Nightly Rate: $433.65* 

Hotel building at twilight

Image courtesy of Marriott Marquis, Washington, DC

Additional ONS Congress Hotels

AC Hotel Washington DC Convention Center  

601 K Street NW 
Washington, DC 20001 
Nightly Rate: $369.88* 

Courtyard Washington Downtown Convention Center

901 L Street NW  
Washington, DC 20001 
Nightly Rate: $393.07*  

Embassy Suites DC Convention Center 

900 10th Street, NW 
Washington, DC 20001 
Nightly Rate: $410.47* 

Grand Hyatt

1000 H Street NW 
Washington, DC 20001  
Nightly Rate: $451.05* 

Residence Inn Washington Downtown Convention Center 

901 L Street NW  
Washington, DC 20001 
Nightly Rate: $416.26* 

The Westin Washington, DC Downtown Hotel 

999 Ninth Street NW  
Washington, DC 20001  
Nightly Rate: $426.70* 


*Includes current tax rate (15.95%). 

ONS has negotiated special conference rates at each of the above hotels.

If you choose to not book your hotel with our housing partner, Maritz, you will be forgoing the negotiated rates.

Cancellation Policy: All reservations must be held with a credit card guarantee valid through May 2024. This guarantee is for arrival only, and a form of payment will be required upon check-in. No checks will be accepted for hotel payment. Reservation changes and/or cancellations are accepted online or in writing via email to until March 31. No cancellations will be taken over the phone. From April 1–3, changes are accepted on a space-available basis. After April 3, conference reservation information will be transferred to the hotel. Please allow the hotel up to 48 hours to have full access to your reservation. If you would like to make any changes or request your hotel confirmation number, please contact the hotel after April 5. Cancellation policies vary per hotel. 

Closest Airport

We recommend flying into the following airport, located 3.7 miles from the convention center:  

Ronald Reagan Washington National Airport (DCA)  
2401 Ronald Reagan National Airport Access Rd.  
Arlington, VA 22202 

Another nearby airport:  

Washington Dulles International Airport (IAD)  
1 Saarinen Circle 
Dulles, VA 20166 

An airport with many airplanes parked on tarmac

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Arial view of Washington DC, showing three monuments

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Local Attractions

Washington, DC is home to the country’s finest monuments and memorials, world-class museums that you can enter for free, a wealth of retail, six professional sports franchises, acclaimed theaters, a dining scene packed with culinary talent and international cuisine, and so much more.  

Learn more about DC’s top attractions and plan your trip today!  

Maritz Global Events Official Housing Provider

PLEASE NOTE: Maritz Global Events is the official housing provider for ONS 49th Annual Congress. 

ONS has worked diligently with the hotels in Washington, DC, to establish room blocks for attendees and exhibitors. Improper solicitation of hotel reservations from any company or housing provider other than Maritz Global Events is not approved by ONS. Reservations made by unaffiliated organizations may appear to be for lower rates; however, they may be illegitimate, have unreasonable cancellation or change penalties, or be nonrefundable. Please be aware of and report any unauthorized solicitation to ONS.  

For housing inquiries, please contact Maritz Global Events at 864-641-6757.