One of the not-so-secret ways to get to Europe is flying with Icelandair, which offers a free stopover in Iceland for up to three days. Grabbing a day or two in Reykjavik at the start or end of your vacation is a pretty great bonus, especially if that means you wound up seeing the northern lights on your vacation to Paris.
It's a great time to take advantage of the service because Icelandair has a sale right now that could get you to Europe with a free stopover in Iceland for as little as $319 roundtrip.
In the U.S., the airline flies out of Denver, Minneapolis, New York City (JFK & EWR), San Francisco, and Washington D.C. (IAD & BWI) with sale-priced tickets to Amsterdam, Berlin, Frankfurt, Helsinki, London (LHR & LGW), Oslo, Paris, and Stockholm. The offers are available on flights taken between November 1 and March 31, 2019, as long as you book by the end of the day on September 30. (No sale prices are available between December 20 and January 7, and Minneapolis flights are only available through December 19.)