There are four on-airport parking lots designated for long term parking at DTW. These are the McNamara Long-Term Parking Lot, Big Blue Deck Long Term Parking Lot, and Green Lots 1 & 2. The cost of parking in the Detroit Airport long term parking lots ranges from $26-$14. This price is subject to change, so be sure to check the airport’s official website before planning your parking costs. If you’d prefer to lock in a low price before your trip, you can always book an off-airport parking spot before your flight. These lots, such as US Park and Valet Connections, offer DTW long term parking at lower rates.