Hotel Information

Crystal Gateway Marriott
1700 Jefferson Davis Highway 
Arlington, Virginia  22202
Phone: +1-703-920-3230
Toll Free Reservations (USA and Canada): +1-888-236-2427
Phone Reservations: +1-877-212-5752
Fax: +1-703-685-4652
Hotel web address:
Online Group Reservations ($159.00):
Online Student Reservations ($120.00)
Student ID must be presented upon check-in. SIAM is able to negotiate a limited number of special student rate rooms. Please book early as these rooms sell out quickly!

Hotel Reservation Deadline: Monday, December 7, 2015 EXTENDED to 5:00 PM Eastern Time, Monday, December 14, 2015

Hotel Reservation Alert!
SIAM received a report of an attendee being contacted via telephone from someone posing as a Marriott Representative to solicit hotel reservations. SIAM does not share or distribute personal, registration or housing details with any company or person for the purpose of solicitation by phone. Attendees should make hotel reservations as outlined in the “Reservations” section below. If you receive a similar call, please do not share information with the caller and report the call to [email protected].


Experience Crystal Gateway Marriott, located minutes from downtown Washington, D.C. and less than 1 mile from Reagan National Airport. Explore the entire Washington, D.C. area via the Metro which is connected to the Arlington hotel. Step into the spacious hotel lobby here in the heart of Crystal City, VA, and enjoy complimentary wireless Internet access.

Did you know?

Your support in staying at the Crystal Gateway Marriott helps keep the conference costs down, which directly affects your registration fees. SIAM guarantees the hotel that we will fill a certain number of “room nights” (rooms per night) during the conference. SIAM incurs penalties if too many attendees opt to stay in other hotels in the area or neglect to indicate to the hotel that they are with the SIAM conference. At this time, conference costs do not include meeting room rental. If SIAM fails to fill the contracted room block, SIAM is then charged the cost for the meeting rooms on a daily basis, along with a hefty penalty. Future registration fees could increase to cover these additional risks.


SIAM is holding a block of rooms at the Crystal Gateway Marriott. These rooms are being held on a first-come, first-served basis at the following discounted rates. Please be aware the room block fills quickly, so we suggest you make your hotel and travel plans early.

The group rate is guaranteed until the cutoff date unless the block fills prior to that.  If there are rooms available after the cutoff date, they will be available at the best rate offered at that time.

Reservation Deadline –December 7, 2015 EXTENDED to 5:00 PM Eastern Time, Monday, December 14, 2015 (or until the room block is filled)

Single/Double              $159.00 per night plus 13% tax
Student rate                $120.00 per night plus 13% tax
Student ID must be presented upon check-in. SIAM is able to negotiate a limited number of special student rate rooms. Please book early as these rooms sell out quickly!

Room rates include complimentary Internet access.
All rooms based on availability.
All rates are subject to state and local occupancy taxes.

In the event that you find a lower room rate, please make the reservation at the lower rate and notify SIAM immediately ([email protected]). By doing this you will receive the lower rate and be counted towards the SIAM room block. However, please be aware by booking outside the SIAM room block at a lower rate, you may not receive the same benefits as rooms reserved in the SIAM room block (i.e complimentary Internet access).

Reservations are not confirmed until acknowledged in writing by the hotel or verified by phone.  Be sure to get a confirmation number from the hotel and be prepared to provide that number to the front desk clerk upon check-in at the hotel.  If hotel reservations are requested by facsimile and written confirmation is not received within two weeks of sending the facsimile, please contact the hotel immediately to verify that the reservation request was received and processed.  Be sure to get a confirmation number.

When making reservations, be sure to identify yourself as an attendee of the ACM-SIAM Symposium on Discrete Algorithms (SODA16). In order to receive the SIAM group rate, please make your reservations via fax at +1-703-685-4652 or mail the Hotel Reservation Form directly to the Crystal Gateway Marriott. You may also make your reservation by phone by calling +1-888-236-2427 (USA and Canada) or +1-877-212-5752. Also online at:
Online Group Reservations ($159.00):
Online Student Reservations ($120.00)

Remember to get your confirmation number!



The Crystal Gateway Marriott requires a deposit equal to the room rate and tax for the first night of each reservation to guarantee your reservation. The hotel will provide confirmation upon request.



If you need to change or cancel your reservation, you must contact the hotel prior to 11:59 PM the day before your scheduled arrival to receive a deposit refund. You can contact the hotel at +1-888-236-2427 (USA and Canada) or +1-703-920-3230. Remember to get a cancellation number!


Check-In and Check-Out

Check-in time is 4:00 PM and check-out time is 12:00 PM.



Posted rates apply.


Health Facilities

Hotel guests will have complimentary use of the fitness center in the Crystal Gateway Marriott..


Telephone Messages

The hotel operator can be reached at +1-703-920-3230.  Telephone messages can be left in guest rooms for guests staying in the hotel.


Hotel Room Reservation Form

The hotel reservation form is now available here.


Hotel Room Sharing Form

The hotel room sharing form is available here.

To RSVP to the conference on Facebook and connect with other attendees, find roommates etc., please visit

If you are tweeting about the conference, please use the designated hashtag to enable other attendees to keep up with the Twitter conversation and to allow better archiving of our conference discussions.  The hashtag for ALENEX is #ALENEX16, and ANALCO is #ANALCO16.


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