Flying into Cincinnai from London (or any international departure point) beats the pants off landing at JFK or in Boston Atlanta or Miami. Baggage arrives more quickly; Immigration and customs are a breeze; and he airport is (by comparison) so small it's easy to negotiate. There are plenty of shops and eating spots. The Delta Crown Room is huge and open to first/business class passengers holders of American Express cards (gold and up) and various others. For travellers to the West Coast Cincinnati offers another advantage. Flight times from London (and I assume the continent) are just marginally longer than they are to East Coast airports -- and are less likely to be put in holding patterns. But flights from Cincinnati to the West Coast are almost an hour shorter.