Existing Customers Use a single account to access Quark Expeditions's online services. Travel agents: Use your agency's IATA number and password or your personal email and password to log in. Other Customers: Use your email and password to log in. Use a single account to access Quark Expeditions's online services. Travel agents: Use your agency's IATA number and password or your personal email and password to log in. Other Customers: Use your email and password to log in. Use a single account to access Quark Expeditions's online services. Travel agents: Use your agency's IATA number and password or your personal email and password to log in. Other Customers: Use your email and password to log in and request a brochure.   Email Address/IATA: Password:   Forgot Your Password? Enter your email address or IATA in the login prompt and click here.