Finnair, Delta, British Airways, American Airlines and various other airlines have round-trip flights from Dallas (DFW) to Warsaw, Vienna, or Venice (WAW, VIE, VCE) for $427-$494 with a connection. Flights February, March, October, November, and December. No Saturday departures. 7-day minimum stay required. No Christmas dates available.
A Carry-on bag and also a personal item is allowed for free. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.