American Airlines is handing out 100 AAdvantage miles just for registering for their latest hotel and car rental promo! It's a super easy win, and every little bit helps, right? You need to register by December 31, 2025. But the real potential lies in the bonus miles you can earn if you actually book a hotel or car rental through the promotion. You can snag 750 miles for a hotel stay, 750 miles for a car rental, or a sweet 1,500 miles if you do both! Just make sure your bookings are completed by February 28, 2026 to qualify. While these miles aren’t going to fund your round-the-world trip, they can be incredibly useful. Mainly, any activity in your AAdvantage account extends the life of your miles by 24 months. So, if you're worried about your AA miles expiring, registering for this promotion (and potentially doing a hotel stay or car rental) is an easy way to keep them alive. Think of it as a cheap insurance policy for your AAdvantage balance!