Vienna in late autumn has a specific mood. The summer crowds thin out, the leaves turn gold around Schönbrunn Palace, and concert season hits its stride at the Musikverein. You spend mornings walking cold streets between coffee houses and evenings listening to Mozart in rooms built for emperors.
A week of flights, hotels, and tickets runs around $2,100 from the US. If dropping that all at once puts a dent in your savings, you do not have to. Splitting it up interest-free over time makes the whole trip much easier to stomach.
Keep in mind that an intro rate is a deadline, not free money. Once that 18-month window closes, any balance left on the card gets hit with the regular ongoing interest rate. Set your autopay, clear the bill before month 18 ends, and enjoy the music.