ASTRO's 60th Annual Meeting


ASTRO housing is now closed. For assistance in creating, modifying or cancelling your hotel, please contact SPARGO Inc.

ASTRO 2018 Housing Agent

The official housing agent for ASTRO 2018 is SPARGO Inc. Attendees have the option to make their reservations online or by calling ASTRO Housing Center directly at 1-800-541-6058.

For the best hotel availability, we strongly encourage you to make your reservations early. The deadline to reserve a room is September 27, 2018, subject to room inventory availability. Hotel reservation requests received after this date will be processed on a space-available basis and may be subject to higher rates. Hotel reservations are made on a first-come, first-served basis.

View the list of ASTRO official hotels and room rates.

Member Housing Benefits

ASTRO members receive the benefit of having access to prime hotel options for this year’s Annual Meeting. The Grand Hyatt San Antonio, Marriott Rivercenter and Marriott Riverwalk hotels have been designated as member only hotels. These hotels are within walking distance to the Henry B. Gonzalez Convention Center.

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 five or more rooms for their delegation. If you would like to create a group room block, please contact Darlene Howke. Please note that the group housing website is for attendee reservations only. Exhibitors who need to request a room block must secure their reservations via the exhibitor housing website.

Hotel Confirmations

When you reserve housing online or by phone, you will receive an immediate confirmation of your reservation by email. If you do not receive your confirmation, please call the ASTRO Housing Center at 1-800-541-6058 or 703-449-6418 to verify that your request has been received.

Payment and Guarantee Information

All hotel reservations require a credit card to guarantee the room. The credit card must have an expiration date of at least October 2018. If you want to later change the guarantee method from a credit card to check, please make the check payable to the hotel in U.S. dollars and send it to the ASTRO Housing Center, 11208 Waples Mill Road, Suite 112, Fairfax, VA 22030. Do not make checks payable to ASTRO or to ASTRO Housing Center. Hotels will deposit the check in order to guarantee the room.

Housing Changes/Cancellations

You may cancel or make changes to your reservation online or in writing until 5:00 p.m. Eastern time on September 27, 2018. Written requests should be sent to the ASTRO Housing Center at and will be acknowledged with a confirmation within five business days. To change or cancel a reservation online, you will need your confirmation number and the email address you used to make your reservation. Online requests are acknowledged with an immediate email confirmation.

Starting October 3, 2018, if you need to make a change or cancel your reservation, you must call your hotel directly. Cancellations must be made at least seventy-two hours prior to your scheduled arrival date or you will be assessed a cancellation fee equivalent to one night's room and tax, which will be charged to your credit card.

This cancellation policy will be strictly enforced. Please retain the cancellation confirmation from the ASTRO Housing Center or the cancellation number provided to you by the hotel, as this proof of cancellation will be required to resolve any credit card disputes.

Cancelling your hotel reservation does not automatically cancel your meeting registration. To cancel your meeting registration, please contact

Special Assistance

All ASTRO 2018 official hotels comply with the Americans with Disabilities Act. If you require special assistance, please contact the ASTRO Housing Center at or 1-800-541-6058 or 703-449-6418.

Room Preferences and Special Requests

Hotels will not guarantee bed type or special requests. Please confirm your request at check in.

Attendee Hotel Reservation Disclosure

By reserving a room at one of ASTRO’s official hotels for the 2018 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. Further, 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

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