 And booking site Hopper says airline ticket prices are down 18% from a year ago. AAA projects nearly 71 million travelers will head 50 miles or more from home over the Independence Day holiday travel period. This July 4th, hitch a free ride with Metro. Metro buses and trains are free after 5 p.m. Bring the whole family and celebrate. Say no to traffic. Say yes to a free ride after 5.