American Airlines, British Airways, and Iberia have code-share round-trip flights from Dallas (DFW) to Frankfurt or Berlin (FRA, BER) for $505-$542. Nonstop Frankfurt flights are in November, February, and March. Berlin flights have a connection and are between December and March. 7-day minimum stay required. Holiday blackouts apply.
This is an older deal that we mentioned a few months ago. We think it’s a good price range for German round-trips, especially the nonstop route. The 6-month lowest moving average price for these is about $624.