Delta has round-trip flights from Dallas (DFW) to Barcelona (BCN) for $454-$469 with a connection. Flights August, September, October, and March.
Note: Carry-on bag is allowed for free on Delta. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Note: We also posted a Madrid deal a few days ago.
Read More Cheap Flights: Dallas to Barcelona $454-$469 r/t – Delta