Delta, KLM, and Air France, have round-trip flights from Dallas (DFW/DAL) to Amsterdam (AMS) for $520-$522 with a connection. Flights October to March. Departures on Tuesday, Wednesday, and Sunday.
Note: Carry-on bag is allowed for free on Delta, KLM, and Air France. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Priceline has “Express Deals” available for $465 on most of these dates. The airline and exact flight are hidden until after purchase. Purchases are final. No 24-hour free cancellation. Guaranteed to be on a major airline. Select the deal with 0 to 1 stops and a layover less than 3-hours. We think the hidden carrier is either a Oneworld or Star Alliance carrier because advance seat assignment and checked bags are included in hidden fare.