Some of the cheapest cities to visit in Europe this fall

Every fall in the United States, airfare prices take a dive -- after all, summer’s over, demand dries up and deals start busting out all over. This is especially true for transatlantic flights. If Europe is on your bucket list, or you know and love it well and are planning a return, now is the time to shop.

When to fly to Europe

Last week, I searched for flights to Europe for trips in late August through Dec. 15. Most were super-cheap fares for September or October (but remember, fares can and do change with little notice). Tip: Figure out the weeks or months you want to fly, then use a deal-finding tool to pinpoint the cheapest flights.