You can hop on just outside the airport's mainland ferry terminal building or across the street from Union Station. The downtown shuttle stop is located outside the Fairmont Royal York Hotel's western entrance on York Street, near the north-east corner of York Street and Front Street.

The complimentary Billy Bishop Toronto City Airport (YTZ) shuttle provides a vital link between downtown Toronto and the airport's mainland terminal. The primary downtown stop is located on York Street, specifically on the west side of the Fairmont Royal York Hotel, which is directly across from the York Street entrance of Union Station. The shuttle stop is easily identified by its distinctive branding and is situated at the northeast corner of Front Street and York Street. The shuttles typically run every 15 minutes, with the journey taking approximately 15 minutes depending on Toronto's often-congested traffic. At the airport end, the shuttle drops off and picks up passengers on the mainland, just in front of the terminal's pedestrian tunnel entrance. The service is free for anyone, even those not flying, and offers onboard Wi-Fi. In 2026, it remains the most convenient way for travelers to connect from the GO Train, UP Express, or TTC subway directly to the boutique airport on the Toronto Islands.