Modify or Cancel a Reservation

Need to change or cancel a reservation booked through The Cosmopolitan website? Here's how.

  • If you booked your reservation by phone...

    Please call 877.551.7778.

  • If your reservation was booked on our website...

    • Locate the Web Reservation Number listed in your confirmation email

    • Visit our Online Room Reservations Site (from a desktop computer or mobile device)

    • Click on the Modify/Cancel link at the bottom of the page:


    • Enter your Reservation Number and last name to access your reservation:


  • If your reservation was booked by a third party...

    If your reservation was booked on a third-party website or by a travel agent, please contact them directly regarding changes to your reservation.

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