A decade ago, Delta and US Airways shuttles were the preferred mode of travel between the cities. But high fares, slow airport security and frequent flight delays — along with Amtrak’s high-speed Acela trains, online ticketing and workstation amenities — have eaten away at the airlines’ share of passengers.
Between New York and Washington, Amtrak said, 75 percent of travelers go by train, a huge share that has been building steadily since the Acela was introduced in 2000 and airport security was tightened after 2001. Before that, Amtrak had just over a third of the business between New York and Washington.
Acela didn't speed things up that much, and Amtrak's unreserved trains used to be more convenient than the current system.