Iceland in the shoulder seasons of spring and fall is quiet, cold, and incredibly beautiful. You get the roaring waterfalls and massive glaciers without the summer crowds, and the flights are usually much cheaper. A solid trip runs about $3200, which is a lot of money to spend all at once.
We can break that cost down into smaller steps to make it manageable. By using the Citi Simplicity® Credit Card (Citi), you get 0% for 18 months on purchases and balance transfers from date of account opening. That lets you pay $177.78 a month to cover the trip without paying extra in interest.
Remember that the 18-month window is a hard deadline, not free money. If you still have a balance when the 0% for 18 months on purchases and balance transfers from date of account opening ends, the remaining amount will start racking up interest at the regular high rate immediately.