American Airlines is showing a discounted airfare from Washington, D.C. (DCA) to Venice, Italy for late summer onwards. Just $663 round-trip.
DCA is Ronald Reagan National Airport, which is served conveniently by the Washington Metro. Book for travel as soon as August 23, minimum 7 night stay, depart Sunday through Wednesday.
This is an excellent fare to this highly-popular destination. Southwest Airlines can get you to DCA from other areas of the United States.