When it comes to offering cheap international flights, some airports are better than others. And in the U.S., according to a new study, the best airport for travelers looking for deals is New York City's John F. Kennedy International. Scott's Cheap Flights, a subscription service for cheap flight alerts, analyzed the alerts sent to members in 2018 and found that JFK had the most frequent deals. Examples in the study include a $297 round-trip to Paris, a $555 to Sydney, and a $472 to Kuala Lumpur.