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Book your stay at the Mainstay Suites St. Louis – Airport hotel in Bridgeton, MO. Our pet-friendly hotel offers a variety of different amenities including a fitness center, free hot breakfast, free Wi-Fi and guest laundry. All guest rooms include a fully-equipped kitchen, iron and board, and sofa bed. Stay conveniently close to the St. Louis Zoo, Missouri Botanical Garden and Gateway Arch. Book today!