AMS-DFW/DAL/MCO/RSW/JAX/PHL, from €417 a/i; K fare.

Around ~5.2cpm for Dallas, but there aren't many runs that are so convenient/available as this.

Quick turnarounds: available almost every Saturday/Sunday during the fall/winter.

Sample dates for DFW/DAL:

21MAR - 22MAR.
29NOV - 30NOV.

If heading for Texas, you can overnight in either DFW or IAH.

PHL and Florida destinations are ~ €20 more.

And, yes, you can route to PHL via IAH to get a few more miles.