COSM 2024 and all scientific sessions, posters, and exhibits will be held at the Hyatt Regency Chicago. Evening Society events will be held at the Sheraton Hotel. 

Hyatt Regency Chicago
Access downtown Chicago and beyond from Hyatt Regency Chicago, located steps to public transportation stations, including the L train and CTA buses. Leave your car at the hotel to explore the city by foot with convenient parking options.

Chicago Midway International Airport: 13 miles
O’Hare International Airport: 17 miles

COSM has arranged special meeting discounts on United Airlines. These special discounts are available by booking with United directly, through a travel agent, or online.

United Airlines
7:00 am–9:00 pm CST; Monday–Friday
8:00 am–5:00 pm CST; Saturday–Sunday
ACS Z Code: Z
Agreement Code: 644077

Purchase your ticket online at and receive a discount off the lowest applicable fares. When booking online, please enter ZMMQ644077 to receive your discount. Area/Zone fares based on geographic location are also available with no Saturday night stay required.

Avis is designated as the official car rental company for COSM 202
3. Special meeting rates and discounts are available on a wide selection of GM and other fine cars. To receive these special rates, be sure to mention your Avis Worldwide Discount (AWD) number when you call.

Avis Online Reservations
Phone: 800-331-1600
AWD Number: B169699