October is the best time to visit Seoul. The summer heat breaks, leaves turn red over Gyeongbokgung Palace, and street food vendors in Myeongdong steam late into the cool night. A full trip usually runs about $2,900 for flights, hotels, and daily market trips.
Instead of dropping that cash all at once, you can spread it out. Spreading $2,900 over an 18-month zero-interest window breaks down to $161.11 per month.
Keep in mind that a zero-percent period is a repayment window, not free money. If you still owe anything when those 18 months are up, standard interest applies to whatever balance is left.