Yuma Park-n-SwapOctober 27, 2016 in Arizona by robl Yuma Park-n-Swap Largest flea market in the So. Western Arizona. 30,000 weekend shoppers. 40 acres with 1,000 paved spaces. Open: Thursday through Sunday 6am – 5pm. Location: 4000 S. 4th Ave., Yuma, Arizona, 85365 Phone: 928-726-4655