Most Americans are not taking advantage of applying for travel credit cards that can allow them to travel for free, a new survey revealed.

The U.S. News Summer Travel Survey found that a little more than half (54%) of Americans are intending to go on a vacation. But nearly half (45%) of the respondents are not planning to use a credit card for their trip.

Moreover, 61% of them do not have a travel credit card, and 70% do not intend to apply for a credit card to help pay for their vacations.

Of the people who use a travel credit card, only 49% have redeemed rewards amounting to $1,051 or more over the past year.

In general, men have more tendency than women to open a travel credit card and redeem travel and other rewards.

Purchasing highly expensive items like vacations using a credit card may seem risky, but it can give cardholders financial advantages. Responsible use of credit card can lead to benefits such as travel rewards like cash back, free hotels accommodations, or free flights, Beverly Harzog, credit card expert and consumer finance analyst at U.S. News, advised.

The only group that appears to maximize the use of travel credit cards are millennials, according to a CreditCards.com study. While the cash back feature attracts one third (31%) of Americans, only a few millennials showed interest in them. The cohort is more interested in sign-up bonuses enabling them to book trips.

Around 36% of millennial tourists are choosing cards that provide sign-up bonuses worth $500 in cash or $1,200 in travel credit.

Meanwhile, travelers aged 39 or older are more interested in looking for credit cards with zero percent offers. Sign-up bonuses do not attract interest to the older generation as they do to millennials, because millennials appear to travel more. More than half of (57%) of millennials toured at least once last year and many used their sign-up bonuses for their vacation.