Illinois – O'Hare International Airport Cincinnati, Ohio – Greater Cincinnati International Airport Cleveland, Ohio – Hopkins International Airport Columbus, Ohio – Port Columbus International Airport Dayton, Ohio – James M. Cox International Airport Denver, Colorado – Stapleton International Airport Detroit, Michigan – Metro Airport DuBois, Pennsylvania – DuBois-Jefferson County Airport Elmira, New York – Chemung County Airport Erie, Pennsylvania – Erie International Airport Evansville, Indiana – Evansville Regional Airport Glens Falls, New York – Warren County Airport Hagerstown, Maryland – Hagerstown Regional Airport Harrisburg, Pennsylvania – Harrisburg International Airport Hartford, Connecticut – Bradley International Airport Huntington, West Virginia -Tri-State Airport Indianapolis, Indiana – Weir Cook Airport Islip, New York – Islip Airport Ithaca, New York – Tompkins County Airport Jamestown, New York – Chautauqua County-Jamestown Airport Keene, New Hampshire – Dillant–Hopkins Airport Kingsport, Tennessee – Tri-Cities Regional Airport Lawrenceville, Illinois - Lawrenceville-Vincennes International Airport Lima, Ohio – Lima Allen County Airport Lock Haven, Pennsylvania – William T. Piper Memorial Airport Louisville, Kentucky – Standiford Field Mansfield, Ohio – Mansfield Lahm Regional Airport Memphis, Tennessee – Memphis International Airport Minneapolis-St. Paul, Minnesota – Minneapolis-St. Paul International Airport Nashville, Tennessee – Berry Field Newark, New Jersey – Newark International Airport New Haven, Connecticut – Tweed New Haven Airport New Orleans, Louisiana – Moisant Field New York, New York – John F. Kennedy International Airport New York, New York – LaGuardia Airport Norfolk, Virginia - Norfolk International Airport Omaha, Nebraska – Eppley Airfield Parkersburg, West Virginia – Wood County Airport Philadelphia, Pennsylvania – Philadelphia International Airport Phoenix, Arizona – Sky Harbor International Airport Pittsburgh, Pennsylvania – Greater Pittsburgh International Airport Portsmouth, Ohio - Greater Portsmouth Regional Airport Providence, Rhode Island – Theodore Francis Green State Airport Rochester, New York – Greater Rochester International Airport St. Louis, Missouri – Lambert Field Syracuse, New York – Hancock International Airport Toledo, Ohio – Toledo Express Airport Trenton, New Jersey – Mercer County Airport Utica, New York – Oneida County Airport Youngstown, Ohio – Youngstown–Warren Regional Airport Washington, District of Columbia – Washington National Airport Wheeling, West Virginia - Wheeling Ohio County Airport Wilkes Barre, Pennsylvania – Wilkes-Barre/Scranton International Airport Williamsport, Pennsylvania – Williamsport Regional Airport Wilmington, Delaware – New Castle Airport Worcester, Massachusetts – Worcester Regional Airport York, Pennsylvania – Olmstead State Airport Zanesville, Ohio – Zanesville Municipal Airport Canada Montreal, Quebec – Montreal International Airport Toronto, Ontario – Toronto International Airport Allegheny commuter Albany, New