Portugal in November gives you empty coastal cliffs, mild afternoon sun, and warm pastéis de nata fresh out of bakery ovens without summer crowds. The Atlantic beach towns quiet down, hotel rates drop, and you actually get room to breathe.
A solid trip exploring the coast runs around $3,100 for flights, lodging, trains, and all the tarts you can eat. You can pay that all at once, or you can park it on a card with a zero-interest intro period and pay it off in predictable chunks over time.
Keep in mind that a 0% intro APR window is a strict deadline, not free money. If you still owe money after the 15 months are up, the card's regular interest rate kicks in on the remaining balance, and that debt gets expensive fast.