This question already has an answer here:
I'm looking for airline ticket prices, and since my route around Europe is essentially one big circle, it doesn't really matter where I start. I just want to find the cheapest tickets that will get me to Europe. Is there a way to look for airline prices for City ABC to Europe? Or City ABC to a list of any of these 30 destinations? (The choice of 30 was arbitrary, but I was thinking of pooling a list of all capitals or major cities in my route and including all the airports within, say, a 25 mile radius of each of those cities).
As of now, I'm just doing city by city and it's making it difficult to compare prices.