Newish low-cost carrier Norse Atlantic has fares to Europe from $110 one way right now — meaning it's probably cheaper to fly to Europe than to another city in the US. These are some of the lowest one-way fares we've seen to Europe in the past few years, but it's good to keep in mind that if you're traveling with more than a backpack, you'll need to pay for luggage.
This sale is set to end September 26th, so make sure to book before then.
September 2022 - March 2023
The cheapest fares we've found are on the New York, JFK to London, LGW route:
You can read more about the sale on Norse's website — keep in mind that it ends on September 26th!
Once you're in London, Berlin, or Oslo, it's generally easy and cheap to book flights or take a train to other European destinations.