Housing for the ASTRO Annual Meeting is now closed!

Housing is now closed for the 2022 ASTRO Annual Meeting. If you need assistance with modifying an existing reservation, please contact your assigned hotel directly. New reservation requests should be directed to one of the official ASTRO hotels below. Please note that the ASTRO rate is not guaranteed at this time. Room availability and rate are at each hotel's discretion.

Hotel Phone Number
Canopy by Hilton San Antonio Riverwalk 210-404-7516
Courtyard by Marriott San Antonio Riverwalk 210-223-8888
Emily Morgan San Antonio - a Double Tree by Hilton Hotel 210-225-5100
Grand Hyatt San Antonio 210-224-1234
Hampton Inn San Antonio - Downtown 210-225-8500
Hilton Palacio del Rio 210-222-1400
Holiday Inn San Antonio Riverwalk 210-224-2500
Hotel Contessa Luxury Suites 210-229-9222
Hotel Valencia Riverwalk 210-227-9700
Hyatt Regency San Antonio Riverwalk 210-222-1234
La Quinta Inn & Suites San Antonio Riverwalk 210-222-9181
Marriott Rivercenter, San Antonio 210-223-1000
Marriott Riverwalk, San Antonio 210-224-4555
Mokara Hotel & Spa 210-396-5800
Omni La Mansion del Rio 210-518-1000
Sheraton Gunter 210-227-3241
Tru by Hilton San Antonio Downtown 210-348-2924
Westin Riverwalk, San Antonio 210-224-6500

‚ÄčASTRO 2022 Housing Agent

The official housing agent for ASTRO 2022 is SPARGO, Inc. If you are contacted by anyone who is not a representative of SPARGO, Inc., asking if you need assistance with hotel accommodations or registration for the ASTRO Annual Meeting, please get as much information as you can and pass it along to us. Learn more about our Housing Poachers and Pirates Policy.

Special Requests

Hotels will not guarantee room types or special requests. Please confirm your request at check-in.

Hotel Changes and Cancellations

On or before Thursday, September 29, 2022, you must submit your cancellations or changes online or in writing to the ASTRO Housing Center. A confirmation will be sent to you within five (5) business days after receipt of your written request. If you do not receive this confirmation, please contact the ASTRO Housing Center to verify that your change or cancellation request was received. Beginning Wednesday, October 5, 2022, you must call the hotel directly for any changes and/or cancellation.

If you do not cancel at least seventy-two (72) hours prior to your scheduled arrival date, you will be assessed a cancellation fee equivalent to one (1) night's room and tax. Please retain the cancellation confirmation from the ASTRO Housing Center or the cancellation number provided to you by the hotel. This proof of cancellation will be required to resolve any credit card disputes.

Canceling your hotel reservation does not automatically cancel your meeting registration to attend the ASTRO Annual Meeting. To cancel your meeting registration, please contact astroregistration@spargoinc.com.

Group Attendee Housing

For your convenience, a group housing website has been created for international travel groups or other entities who plan to bring a delegation to the ASTRO Annual Meeting. The group housing website allows group organizers to reserve a block of three or more rooms for their delegation. If you would like to create a group room block, please contact Amanda Tokarski. Please note that the group housing website is for attendee reservations only and all rooms must be prepaid. Exhibitors who need to request a room block must secure their reservations via the exhibitor housing website.

Hotel Reservation Disclosure

By reserving a room at one of ASTRO’s official hotels for the 2022 Annual Meeting, you agree to permit ASTRO and its agents, and your assigned hotel(s) to exchange your personal information for the purpose of facilitating your hotel reservation. You agree to release ASTRO and its agents, ASTRO’s official hotels and their respective officers, directors, employees and agents from any liability relating to the disclosure of your personal information for this purpose.


For housing questions, contact the ASTRO Housing Center:
1-800-541-6058 or 703-449-6418

American Society for Radiation Oncology
251 18th Street South, 8th Floor
Arlington, VA 22202
Telephone: 703-502-1550


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