Nonstop ticket price varies based on "Nonstop flights only" option
Trying to price a ticket from DFW to EWR departing 5/31 and returning 6/1.
If "Nonstop flights only" is selected, price starts at $1313.
If "Nonstop flights only" is NOT selected, price starts at $1230 for the same nonstop flights.
I could replicate this repeatedly.