How much does it cost to stay at Motel 6 Marietta, GA - Atlanta Northwest? As of 5 Oct 2022, prices found for a 1-night stay for 2 adults at Motel 6 Marietta, GA - Atlanta Northwest on 11 Oct 2022 start from CA $61, excluding taxes and fees. This price is based on the lowest nightly price found in the last 24 hours for stays in the next 30 days.