Want to pad your AAdvantage mileage balance without even flying? Bask Bank lets you earn American Airlines AAdvantage miles simply by keeping money in their savings account. It's a pretty cool concept – think of it as getting rewarded for saving, which is a win-win! They also have a cash-interest savings account if you're not into miles. Bask Bank has been upping its game since it launched in 2020, increasing interest rates on both its miles and cash accounts several times. This is worth paying attention to because it provides another avenue for accumulating miles, especially if you're trying to boost your balance for a dream redemption. Right now, Bask Bank is offering a bonus of 10,000 AAdvantage miles if you sign up by February 28, 2026, and meet certain deposit requirements. If you have some cash sitting around, this could be a no-brainer way to earn miles for your next vacation. You’ll need to weigh whether earning miles or cash back makes more sense for your financial situation, but having options is always a good thing!