Connecting LaGuardia Airport to Penn Station and Grand Central Terminal would require the acquisition of just one lot.

A new rail connection could run express from the tunnels at Penn Station or Grand Central Terminal, via the new East Side Access Tunnels, through Sunnyside Yards toward the Hell Gate Bridge along the same right-of-way. The rail line would pass through one private lot before running along the Grand Central Parkway, then onto Port Authority of New York and New Jersey property, before stopping at each of the main LaGuardia Airport terminals.

The total cost of the rail line would be $1.4 billion dollars, according to a 2005 Parsons Brinckerhoff study.