France in late spring or early fall is the move. April through June brings cherry blossoms in Paris, wildflowers in Provence, and long evenings that make outdoor dinners worth the trip. September cools the crowds but keeps the Mediterranean warm enough to swim. Skip August — that's when half of Europe is on holiday, prices spike, and museum lines wrap around blocks.
A two-week trip with a mid-range hotel, a few intercity trains, and decent meals typically lands around $680 per person, not counting flights. The trick most people miss is that this price tag is small enough to charge once and pay down slowly, instead of letting it sit on a high-rate card and quietly grow.
The 18-month window is a deadline, not a discount — it's the length of time you have to pay off the $680 before interest kicks in on whatever's left. At $37.78 a month you'll be at zero well before month 18, but if you skip a few payments or stretch it past the window, the leftover balance starts accruing interest at the card's standard rate, which is the part that turns a cheap trip into an expensive one. Set the autopay, check the statement once a month, and you're done.