Before that, the Delaware residents could only bet (and still can bet on) on parlay cards put out by the Delaware Lottery, which oversees all sports betting in DE. In June 2018, Delaware became the first state outside of Nevada to fully legalize sports betting-allowing select locations to start accepting single-game bets. The response MUST include an Allow header containing a list of valid methods for the requested resource. 405 - Method Not Allowed The method specified in the Request-Line is not allowed for the resource identified by the Request-URI. On Sale Online Delaware Sports Betting Parlay Cards Worth It,Best Place To Buy Online Delaware Sports Betting Parlay Cards Review. You must be 21 years of age or older to play Video Lottery, Sports Lottery, Table Games and Internet Games. It's the Law - You must be 18 years of age or older to purchase Delaware Lottery tickets. Play Responsibly - If you or someone you know has a gambling problem, call the Delaware Council on Gambling Problems Helpline: 1-88 or visit.