The Delta SkyMiles Platinum American Express Card is a great card for Delta Air Lines frequent fliers who want added benefits and don't mind paying a big annual fee.

Airline credit cards are a great tool to earn miles. So if you're planning upcoming flights, earning rewards on one of these cards can help you save money.

Each airport lounge has its own guest policies. Here's what you need to know about bringing guests into the lounge with you before a flight.