Originally Posted by catocony

Most business customers from DCA/IAD to New York prefer to fly into LGA since it's a much faster cab ride into the city. Maybe if UA beefed up IAD-LGA they could pick up some customers. Those of us who live near Dulles don't really use Amtrak since it's a long ride down to Union Station to catch a train. So, while Acela has nearly killed off the DCA-LGA hourly shuttles, it's not a great option for everyone.

I've flown IAD-JFK a bunch of times, but usually to then drive further out on Long Island. Fares on IAD-JFK were usually a few hundred bucks cheaper than to LGA, so it got some tourist business connecting in from elsewhere at IAD.

EWR really isn't an option for a lot of people. Cab fares through the tunnels are exorbitant, and taking the train from EWR to Penn Station and then cabbing/subway from there to wherever makes for a really long day.