Credit Cards with Airport Lounge Access
Below is a list of cards that gives you access to airport lounges.

I have the
Platinum Card® from American Express and this card has the best airport lounge access of any credit card in the market. Here are the lounges you can access.
US Airways - To access US Airways lounge, you have to buy an annual membership that costs anywhere between 225 and $325 depending on your elite status
Delta SkyClub - To acesss Delta SkyClub without a Platinum Card, you have to pay an annual membership fee which ranges between $300 and $450
American Airlines Admiral Lounge - With the Platinum Card, you have to pay between $350 and $500 depending on your elite status to access the lounge
Priority Pass Lounges - Priority Pass has various tiers in their membership. With the Amex Plat, you get complimentary membership to the highest tier level. This means you do not have to pay any fees to access the lounge (vs the lower tiers). This value alone is worth $349.
The Visa Black Card from Barclays Bank provides cardholders with membership to Priority Pass Lounges. However, the complimentary membership is the lower tier one and you can only have 4 free access to their Lounges every year. After that, you need to pay the fee a $27 each time you use the lounge.
The Delta Reserve Credit Card allows you to access their lounge and to bring in two guests as well if you are flying with them. Aside from that, cardholders get an annual companion ticket (which is also valid for first class). And the main feature of this card is that if you spend $60,000 a year on the card, you can rack up enough MQMs to qualify for Silver Elite Status.