One of the best ways to make this year's summer vacation easier on the bank account is to take advantage of some lucrative credit card sign-up bonuses. By simply signing up for a new credit card and meeting a reasonable spending threshold within the first few months, consumers with good credit scores could rack up more than $500 in free travel awards to use this summer! Not sure where to start searching? Don't worry, because we've already reviewed hundreds of card offers this year in order to find the very best travel rewards credit cards with the most generous sign-up bonuses. Check out our top 5 credit cards for summer travel below and start planning your next free vacation today.