The Parking Spot has five separate locations in and around Dallas, all of which accept coupons, as of 2015. Each location has its own coupons, however, so a coupon for one Dallas location is not accepted at the others.
The best way to get a Parking Spot coupon is to visit the company's website, TheParkingSpot.com. Click on the Airport Parking Locations tab on the top-right of the page, and a list of locations pops up. Choose one of the five locations for Dallas, and a new screen tailored for that particular location appears. There is a Coupons tab on the right side of the new page. If you click on it, a new window opens with a printable coupon.
While a coupon can be acquired for any Dallas location in this manner, it is a different coupon for each. It may be for covered or uncovered parking, usable on a daily or weekly basis, offer a different discount or have other unique restrictions. Read it carefully before attempting to use it.