In this video: Given the nature of sports gambling and so little publicly available documented evidence in the field throughout history, it’s impossible to know for sure what the longest odds were on a sports bet that ended up having to be paid out. However, as far as known documented instances are concerned, it would seem the longest odds paid out on any sports bet were probably what ultimately amounted to 2,800,000-1 odds on a 50p ($0.66) bet placed by one Fred Craggs of the UK.