Big Transit hubs in Europe frequently are the ones that have the cheapest fares. From my own personalized experience, I’ve identified that London, Amsterdam, Frankfurt and Milan are usually cheaper to fly into than other smaller sized metropolitan areas. Glance on flight search engines like google like Kayak®⁵ or Skyscanner®⁶ https://how-to-find-cheap-flights86161.cosmicwiki.com/1488250/the_5_second_trick_for_how_to_find_cheap_flights_to_europe_from_the_us