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.**

*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 ONSOC@maritz.com 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. 

_{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.}