Kayak Explore is pretty good for that. Select your city in the US, then check non-stop and Europe. It's on a map and I would prefer a list, but it does the jo

Kayak Explore is pretty good for that. Select your city in the US, then check non-stop and Europe. It's on a map and I would prefer a list, but it does the job. Belfast and Copenhagen are the cheapest transatlantic in March, for instance. http://www.kayak.com/explore/ http://www.kayak.com/explore/