Delta, United, and their Alliance partners have flights from Dallas (DFW) to Amsterdam (AMS) for $381-$426. Flights February to mid-May. 7-day minimum stay required. Flight may operate as a SkyTeam/Star Alliance code-share.
Note: Fare allows for a free carry-on bag, but checked bags will cost about +$60 each-way. Seat selection is free on Star Alliance flights, but has a fee on SkyTeam.