It would take a lot of money, engineering expertise, political maneuvering, and FAA approval.
finally reopened after 9/11, the FAA wouldn't allow any aircraft over a certain size to fly into DCA
. I don't know what the exact number was, but I do know that 757s were not allowed to fly to DCA
at that time (I think they are now, but I'm not sure). The FAA believes (rightly or wrongly) that the larger the plane, the more danger there is to the surrounding area (Pentagon, Capitol, White House, etc). Therefore, that's one hurdle that would have to be overcome.
Secondly, although it is technically possible for widebodies to land at DCA
, they would be very restrictive conditions placed on it. It can be done, but probably not without weight (e.g., revenue!) restrictions and other considerations. Therefore, the runway would have to be extended -- no easy feat, since it's pretty much surrounded by water. This woud require some major engineering feat to extend the runway into the water, and I doubt the taxpayers in the area are willing to pay for it, especially since most of them are already against DCA
In short, it won't happen. DCA
is already well-served as it is, and I doubt many airlines would take the effort of trying to get widebodies there. The need is minimal, and the cost too great.