I've always thought that Newark and JFK we're a bit crowded. Washington-Dulles is a great airport and I feel it's underutilized. I personally like Boston's Logan International Airport (BOS) the best. It has numerous international airlines (Aer Lingus, Air Canada, Air France, Air Nova, Alitalia, British Airways, Koreanair, Lufthansa, Olympic, Sabena, Swissair, TAP Air Portugal, and Virgin Atlantic). American Airlines and Northwest use the airport's location to suppliment hub service to European destinations as well.
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