Vancouver in the summer is where the mountains meet the ocean. You can hike in the morning and hit the beach by lunch. It is bright, green, and expensive. You want to be there in July or August to miss the rain, which means booking by March to beat the crowds.
A typical week here runs about $2100. Instead of dropping all that cash today, we can use a card to break it up. It lets you pay for the flight and hotel over time without interest charges piling up while you are still at the beach.
This intro window is a deadline, not free money. If you still have a balance after the 15 months, the standard interest rate kicks in on whatever is left. Pay it off on schedule to keep the trip from getting more expensive.