There are flights to Montreal, and Toronto in Canada, Nassau, and Freeport in the Bahamas and Bermuda.
Although these are international flights there is no International arrivals or FIS facility at LGA, passengers are prescreened by US customs officials in Canada, the Bahamas and Bermuda.
Washington Reagan National (DCA) has flights to Toronto , Montreal and starting this Summer Bermuda on US Airways. Again there is no IAB or FIS at DCA either, passengers are prescreened at the aiports in Canada and Bermuda.
Eastern Air lines flt # 701, EWR-MCO Boeing 757