If *A isnt a necessary, DL flys JFK-PRG non-stop so you can do for the way back PRG-JFK-IAD or DCA or even BWI depending where you live and how youre getting to the airport. To BUD I dont know what DL will pull up to avoid a 2 stopper youd need to fly AF or KL out of IAD. Advantage to DL back is you clear C&I @ JFK and walk out from IAD or DCA as if you just flew in from LA.

Could be an OTA using multi-city will come up with that DL connection back and a *A there