Main transit hubs in Europe normally are those which have the cheapest fares. From my own private encounter, I’ve found that London, Amsterdam, Frankfurt and Milan tend to be cheaper to fly into than other smaller metropolitan areas. Glimpse on flight search engines like google and yahoo like Kayak®⁵ or https://bookmarkdistrict.com/story19331687/facts-about-how-to-find-cheap-flights-to-europe-from-the-us-revealed