Springhill Suites by Marriott St. Louis Airport Earth City is located approximately six miles from St. Louis/Lambert International Airport and near the Verizon Wireless Amphitheater, Cabelas Outfitters, and Harrah's Casino.All Springhill Suites by Marriott in the USA and Canada have a smoke-free policy that applies to guest rooms, restaurants, lounges, meeting rooms, public space and associate work areas. To accommodate the needs of smoking guests, hotels will have designated smoking areas outside of the property.