That would be a load of DOT stats. You can check their site, but you would have to dig a lot.
I can tell you this, BOS is the 9th largest airport in the United States for O&D. BOS is the 5th largest O&D airport for Europe. Considering that BOS sees leakage to PVD, MHT, BDL and PWM, that is pretty good. You can check a site like faremeasure.com or farereport.com to find out average fares and the number of passengers flying between certain markets.
I can't wait until we get a non-stop flight to Asia, that market will see even more stimulation.
These markets alll have on average over 1,000 daily passengers
New York
Washintgon, D.C.
Chicago
Atlanta
Los Angeles
Baltimore
Denver
Orlando
Tampa
Ft. Lauderdale
Dallas/Ft. Worth
Las Vegas(seasonal)
San Francisco
Ft. Meyers (seasonal)
West Palm Beach (seasonal)
Washington, D.C., New York, Chicago, Los Angeles, San Francisco, Orlando, Ft. Lauderdale, Atlanta, Baltimore and Dallas/Ft. Worth are the 10 largest markets from BOS.
London, England is the largest European market.